diff --git a/Lexer.g4 b/Lexer.g4
index 59d39b13..2f1cceb1 100644
--- a/Lexer.g4
+++ b/Lexer.g4
@@ -17,6 +17,7 @@ ALLOWING: 'allowing';
 UNBOUNDED: 'unbounded';
 OVERDRAFT: 'overdraft';
 ONEOF: 'oneof';
+THROUGH: 'through';
 KEPT: 'kept';
 SAVE: 'save';
 LPARENS: '(';
diff --git a/Numscript.g4 b/Numscript.g4
index 7aa15d61..201758be 100644
--- a/Numscript.g4
+++ b/Numscript.g4
@@ -47,11 +47,12 @@ source:
 	address = valueExpr colorConstraint? ALLOWING UNBOUNDED OVERDRAFT						# srcAccountUnboundedOverdraft
 	| address = valueExpr colorConstraint? ALLOWING OVERDRAFT UP TO maxOvedraft = valueExpr	#
 		srcAccountBoundedOverdraft
-	| valueExpr colorConstraint?		# srcAccount
-	| LBRACE allotmentClauseSrc+ RBRACE	# srcAllotment
-	| LBRACE source* RBRACE				# srcInorder
-	| ONEOF LBRACE source+ RBRACE		# srcOneof
-	| MAX cap = valueExpr FROM source	# srcCapped;
+	| valueExpr colorConstraint?			# srcAccount
+	| LBRACE allotmentClauseSrc+ RBRACE		# srcAllotment
+	| LBRACE source* RBRACE					# srcInorder
+	| ONEOF LBRACE source+ RBRACE			# srcOneof
+	| MAX cap = valueExpr FROM source		# srcCapped
+	| src = source THROUGH proxy = source	# srcThrough;
 allotmentClauseSrc: allotment FROM source;
 
 keptOrDestination:
diff --git a/internal/interpreter/batch_balances_query.go b/internal/interpreter/batch_balances_query.go
index af1c58f3..c82f9fbf 100644
--- a/internal/interpreter/batch_balances_query.go
+++ b/internal/interpreter/batch_balances_query.go
@@ -147,6 +147,10 @@ func (st *programState) findBalancesQueries(source parser.Source) InterpreterErr
 		}
 		return nil
 
+	case *parser.SourceThrough:
+		// TODO also check right side? create failing test with colors
+		return st.findBalancesQueries(source.Source)
+
 	default:
 		utils.NonExhaustiveMatchPanic[error](source)
 		return nil
diff --git a/internal/interpreter/evaluate_expr.go b/internal/interpreter/evaluate_expr.go
index 2fb07289..139c31a6 100644
--- a/internal/interpreter/evaluate_expr.go
+++ b/internal/interpreter/evaluate_expr.go
@@ -140,7 +140,8 @@ func (s *programState) evaluateColor(colorExpr parser.ValueExpr) (*string, Inter
 		return nil, err
 	}
 	if color == nil {
-		return nil, nil
+		c := ""
+		return &c, nil
 	}
 
 	isValidColor := colorRe.Match([]byte(*color))
diff --git a/internal/interpreter/funds_stack.go b/internal/interpreter/funds_stack.go
new file mode 100644
index 00000000..911b6154
--- /dev/null
+++ b/internal/interpreter/funds_stack.go
@@ -0,0 +1,89 @@
+package interpreter
+
+import (
+	"math/big"
+	"slices"
+)
+
+type Sender struct {
+	Name   string
+	Amount *big.Int
+	Color  string
+}
+
+type fundsStack struct {
+	senders []Sender
+}
+
+func newFundsStack(senders []Sender) fundsStack {
+	senders = slices.Clone(senders)
+
+	// TODO do not modify arg
+	// TODO clone big ints so that we can manipulate them
+	slices.Reverse(senders)
+	return fundsStack{
+		senders: senders,
+	}
+}
+
+func (s *fundsStack) compactTop() {
+	for len(s.senders) >= 2 {
+		first := s.senders[len(s.senders)-1]
+		second := s.senders[len(s.senders)-2]
+
+		if second.Amount.Cmp(big.NewInt(0)) == 0 {
+			s.senders = append(s.senders[0:len(s.senders)-2], first)
+			continue
+		}
+
+		if first.Name != second.Name || first.Color != second.Color {
+			return
+		}
+
+		s.senders = append(s.senders[0:len(s.senders)-2], Sender{
+			Name:   first.Name,
+			Color:  first.Color,
+			Amount: new(big.Int).Add(first.Amount, second.Amount),
+		})
+	}
+}
+
+func (s *fundsStack) Pull(requiredAmount *big.Int) []Sender {
+	// clone so that we can manipulate this arg
+	requiredAmount = new(big.Int).Set(requiredAmount)
+
+	// TODO preallocate for perfs
+	var out []Sender
+
+	for requiredAmount.Cmp(big.NewInt(0)) != 0 && len(s.senders) != 0 {
+		s.compactTop()
+
+		available := s.senders[len(s.senders)-1]
+		s.senders = s.senders[:len(s.senders)-1]
+
+		switch available.Amount.Cmp(requiredAmount) {
+		case -1: // not enough:
+			out = append(out, available)
+			requiredAmount.Sub(requiredAmount, available.Amount)
+
+		case 1: // more than enough
+			s.senders = append(s.senders, Sender{
+				Name:   available.Name,
+				Color:  available.Color,
+				Amount: new(big.Int).Sub(available.Amount, requiredAmount),
+			})
+			fallthrough
+
+		case 0: // exactly the same
+			out = append(out, Sender{
+				Name:   available.Name,
+				Color:  available.Color,
+				Amount: new(big.Int).Set(requiredAmount),
+			})
+			return out
+		}
+
+	}
+
+	return out
+}
diff --git a/internal/interpreter/funds_stack_test.go b/internal/interpreter/funds_stack_test.go
new file mode 100644
index 00000000..4572645d
--- /dev/null
+++ b/internal/interpreter/funds_stack_test.go
@@ -0,0 +1,159 @@
+package interpreter
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestEnoughBalance(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "s1", Amount: big.NewInt(100)},
+	})
+
+	out := stack.Pull(big.NewInt(2))
+	require.Equal(t, []Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+	}, out)
+
+}
+
+func TestSimple(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+		{Name: "s2", Amount: big.NewInt(10)},
+	})
+
+	out := stack.Pull(big.NewInt(5))
+	require.Equal(t, []Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+		{Name: "s2", Amount: big.NewInt(3)},
+	}, out)
+
+	out = stack.Pull(big.NewInt(7))
+	require.Equal(t, []Sender{
+		{Name: "s2", Amount: big.NewInt(7)},
+	}, out)
+}
+
+func TestPullZero(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+		{Name: "s2", Amount: big.NewInt(10)},
+	})
+
+	out := stack.Pull(big.NewInt(0))
+	require.Equal(t, []Sender(nil), out)
+}
+
+func TestCompactFunds(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+		{Name: "s1", Amount: big.NewInt(10)},
+	})
+
+	out := stack.Pull(big.NewInt(5))
+	require.Equal(t, []Sender{
+		{Name: "s1", Amount: big.NewInt(5)},
+	}, out)
+}
+
+func TestCompactFunds3Times(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+		{Name: "s1", Amount: big.NewInt(3)},
+		{Name: "s1", Amount: big.NewInt(1)},
+	})
+
+	out := stack.Pull(big.NewInt(6))
+	require.Equal(t, []Sender{
+		{Name: "s1", Amount: big.NewInt(6)},
+	}, out)
+}
+
+func TestCompactFundsWithEmptySender(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+		{Name: "s2", Amount: big.NewInt(0)},
+		{Name: "s1", Amount: big.NewInt(10)},
+	})
+
+	out := stack.Pull(big.NewInt(5))
+	require.Equal(t, []Sender{
+		{Name: "s1", Amount: big.NewInt(5)},
+	}, out)
+}
+
+func TestMissingFunds(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+	})
+
+	out := stack.Pull(big.NewInt(300))
+	require.Equal(t, []Sender{
+		{Name: "s1", Amount: big.NewInt(2)},
+	}, out)
+}
+
+func TestNoZeroLeftovers(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "s1", Amount: big.NewInt(10)},
+		{Name: "s2", Amount: big.NewInt(15)},
+	})
+
+	stack.Pull(big.NewInt(10))
+
+	out := stack.Pull(big.NewInt(15))
+	require.Equal(t, []Sender{
+		{Name: "s2", Amount: big.NewInt(15)},
+	}, out)
+}
+
+func TestReconcileColoredAssetExactMatch(t *testing.T) {
+	stack := newFundsStack([]Sender{
+		{Name: "src", Amount: big.NewInt(10), Color: "X"},
+		{Name: "s2", Amount: big.NewInt(15)},
+	})
+
+	out := stack.Pull(big.NewInt(10))
+	require.Equal(t, []Sender{
+		{Name: "src", Amount: big.NewInt(10), Color: "X"},
+	}, out)
+
+}
+
+func TestReconcileColoredManyDestPerSender(t *testing.T) {
+
+	stack := newFundsStack([]Sender{
+		{"src", big.NewInt(10), "X"},
+	})
+
+	out := stack.Pull(big.NewInt(5))
+	require.Equal(t, []Sender{
+		{Name: "src", Amount: big.NewInt(5), Color: "X"},
+	}, out)
+
+	out = stack.Pull(big.NewInt(5))
+	require.Equal(t, []Sender{
+		{Name: "src", Amount: big.NewInt(5), Color: "X"},
+	}, out)
+
+}
+
+func TestReconcileColoredManySenderColors(t *testing.T) {
+	c1 := ("c1")
+	c2 := ("c2")
+
+	stack := newFundsStack([]Sender{
+		{"src", big.NewInt(1), c1},
+		{"src", big.NewInt(1), c2},
+	})
+
+	out := stack.Pull(big.NewInt(2))
+	require.Equal(t, []Sender{
+		{Name: "src", Amount: big.NewInt(1), Color: c1},
+		{Name: "src", Amount: big.NewInt(1), Color: c2},
+	}, out)
+
+}
diff --git a/internal/interpreter/interpreter.go b/internal/interpreter/interpreter.go
index e4607c3b..eba8d75b 100644
--- a/internal/interpreter/interpreter.go
+++ b/internal/interpreter/interpreter.go
@@ -74,6 +74,13 @@ type InterpreterError interface {
 
 type Metadata = map[string]Value
 
+type Posting struct {
+	Source      string   `json:"source"`
+	Destination string   `json:"destination"`
+	Amount      *big.Int `json:"amount"`
+	Asset       string   `json:"asset"`
+}
+
 type ExecutionResult struct {
 	Postings []Posting `json:"postings"`
 
@@ -233,6 +240,7 @@ func RunProgram(
 		CurrentBalanceQuery: BalanceQuery{},
 		ctx:                 ctx,
 		FeatureFlags:        featureFlags,
+		Postings:            make([]Posting, 0),
 	}
 
 	st.varOriginPosition = true
@@ -257,17 +265,15 @@ func RunProgram(
 		return nil, QueryBalanceError{WrappedError: genericErr}
 	}
 
-	postings := make([]Posting, 0)
 	for _, statement := range program.Statements {
-		statementPostings, err := st.runStatement(statement)
+		err := st.runStatement(statement)
 		if err != nil {
 			return nil, err
 		}
-		postings = append(postings, statementPostings...)
 	}
 
 	res := &ExecutionResult{
-		Postings:         postings,
+		Postings:         st.Postings,
 		Metadata:         st.TxMeta,
 		AccountsMetadata: st.SetAccountsMeta,
 	}
@@ -287,7 +293,10 @@ type programState struct {
 	ParsedVars map[string]Value
 	TxMeta     map[string]Value
 	Senders    []Sender
-	Receivers  []Receiver
+	Postings   []Posting
+
+	// The funds allocated in the left side of a "through" source
+	fundsStack *fundsStack
 
 	Store Store
 
@@ -301,46 +310,69 @@ type programState struct {
 	FeatureFlags map[string]struct{}
 }
 
-func (st *programState) pushSender(name string, monetary *big.Int, color *string) {
+func (st *programState) pushSender(name string, monetary *big.Int, color string) {
 	if monetary.Cmp(big.NewInt(0)) == 0 {
 		return
 	}
-	st.Senders = append(st.Senders, Sender{Name: name, Monetary: monetary, Color: color})
+
+	st.Senders = append(st.Senders, Sender{Name: name, Amount: monetary, Color: color})
+
 }
 
 func (st *programState) pushReceiver(name string, monetary *big.Int) {
 	if monetary.Cmp(big.NewInt(0)) == 0 {
 		return
 	}
-	st.Receivers = append(st.Receivers, Receiver{Name: name, Monetary: monetary})
+
+	senders := st.fundsStack.Pull(monetary)
+
+	if name == KEPT_ADDR {
+		return
+	}
+
+	for _, sender := range senders {
+		postings := Posting{
+			Source:      sender.Name,
+			Destination: name,
+			Asset:       coloredAsset(st.CurrentAsset, &sender.Color),
+			Amount:      sender.Amount,
+		}
+
+		srcBalance := st.CachedBalances.fetchBalance(postings.Source, postings.Asset)
+		srcBalance.Sub(srcBalance, postings.Amount)
+
+		destBalance := st.CachedBalances.fetchBalance(postings.Destination, postings.Asset)
+		destBalance.Add(destBalance, postings.Amount)
+
+		st.Postings = append(st.Postings, postings)
+	}
 }
 
-func (st *programState) runStatement(statement parser.Statement) ([]Posting, InterpreterError) {
+func (st *programState) runStatement(statement parser.Statement) InterpreterError {
 	st.Senders = nil
-	st.Receivers = nil
 
 	switch statement := statement.(type) {
 	case *parser.FnCall:
 		args, err := st.evaluateExpressions(statement.Args)
 		if err != nil {
-			return nil, err
+			return err
 		}
 
 		switch statement.Caller.Name {
 		case analysis.FnSetTxMeta:
 			err := setTxMeta(st, statement.Caller.Range, args)
 			if err != nil {
-				return nil, err
+				return err
 			}
 		case analysis.FnSetAccountMeta:
 			err := setAccountMeta(st, statement.Caller.Range, args)
 			if err != nil {
-				return nil, err
+				return err
 			}
 		default:
-			return nil, UnboundFunctionErr{Name: statement.Caller.Name}
+			return UnboundFunctionErr{Name: statement.Caller.Name}
 		}
-		return nil, nil
+		return nil
 
 	case *parser.SendStatement:
 		return st.runSendStatement(*statement)
@@ -350,35 +382,19 @@ func (st *programState) runStatement(statement parser.Statement) ([]Posting, Int
 
 	default:
 		utils.NonExhaustiveMatchPanic[any](statement)
-		return nil, nil
-	}
-}
-
-func (st *programState) getPostings() ([]Posting, InterpreterError) {
-	postings, err := Reconcile(st.CurrentAsset, st.Senders, st.Receivers)
-	if err != nil {
-		return nil, err
-	}
-
-	for _, posting := range postings {
-		srcBalance := st.CachedBalances.fetchBalance(posting.Source, posting.Asset)
-		srcBalance.Sub(srcBalance, posting.Amount)
-
-		destBalance := st.CachedBalances.fetchBalance(posting.Destination, posting.Asset)
-		destBalance.Add(destBalance, posting.Amount)
+		return nil
 	}
-	return postings, nil
 }
 
-func (st *programState) runSaveStatement(saveStatement parser.SaveStatement) ([]Posting, InterpreterError) {
+func (st *programState) runSaveStatement(saveStatement parser.SaveStatement) InterpreterError {
 	asset, amt, err := st.evaluateSentAmt(saveStatement.SentValue)
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	account, err := evaluateExprAs(st, saveStatement.Amount, expectAccount)
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	balance := st.CachedBalances.fetchBalance(*account, *asset)
@@ -388,7 +404,7 @@ func (st *programState) runSaveStatement(saveStatement parser.SaveStatement) ([]
 	} else {
 		// Do not allow negative saves
 		if amt.Cmp(big.NewInt(0)) == -1 {
-			return nil, NegativeAmountErr{
+			return NegativeAmountErr{
 				Range:  saveStatement.SentValue.GetRange(),
 				Amount: MonetaryInt(*amt),
 			}
@@ -402,55 +418,55 @@ func (st *programState) runSaveStatement(saveStatement parser.SaveStatement) ([]
 		}
 	}
 
-	return nil, nil
+	return nil
 }
 
-func (st *programState) runSendStatement(statement parser.SendStatement) ([]Posting, InterpreterError) {
+func (st *programState) runSendStatement(statement parser.SendStatement) InterpreterError {
 	switch sentValue := statement.SentValue.(type) {
 	case *parser.SentValueAll:
 		asset, err := evaluateExprAs(st, sentValue.Asset, expectAsset)
 		if err != nil {
-			return nil, err
+			return err
 		}
 		st.CurrentAsset = *asset
+		st.fundsStack = nil
 		sentAmt, err := st.sendAll(statement.Source)
 		if err != nil {
-			return nil, err
-		}
-		err = st.receiveFrom(statement.Destination, sentAmt)
-		if err != nil {
-			return nil, err
+			return err
 		}
-		return st.getPostings()
+		fs := newFundsStack(st.Senders)
+		st.fundsStack = &fs
+
+		return st.receiveFrom(statement.Destination, sentAmt)
 
 	case *parser.SentValueLiteral:
 		monetary, err := evaluateExprAs(st, sentValue.Monetary, expectMonetary)
 		if err != nil {
-			return nil, err
+			return err
 		}
 		st.CurrentAsset = string(monetary.Asset)
+		st.fundsStack = nil
 
 		monetaryAmt := (*big.Int)(&monetary.Amount)
 		if monetaryAmt.Cmp(big.NewInt(0)) == -1 {
-			return nil, NegativeAmountErr{Amount: monetary.Amount}
+			return NegativeAmountErr{Amount: monetary.Amount}
 		}
 
 		err = st.trySendingExact(statement.Source, monetaryAmt)
 		if err != nil {
-			return nil, err
+			return err
 		}
 
+		fs := newFundsStack(st.Senders)
+		st.fundsStack = &fs
+
 		// TODO simplify pointers
 		amt := big.Int(monetary.Amount)
-		err = st.receiveFrom(statement.Destination, &amt)
-		if err != nil {
-			return nil, err
-		}
+		return st.receiveFrom(statement.Destination, &amt)
 
-		return st.getPostings()
 	default:
 		utils.NonExhaustiveMatchPanic[any](sentValue)
-		return nil, nil
+		return nil
 	}
 
 }
@@ -483,7 +499,7 @@ func (s *programState) sendAllToAccount(accountLiteral parser.ValueExpr, ovedraf
 
 	// we sent balance+overdraft
 	sentAmt := utils.MaxBigInt(new(big.Int).Add(balance, ovedraft), big.NewInt(0))
-	s.pushSender(*account, sentAmt, color)
+	s.pushSender(*account, sentAmt, *color)
 	return sentAmt, nil
 }
 
@@ -589,6 +605,27 @@ func (s *programState) trySendingToAccount(accountLiteral parser.ValueExpr, amou
 	if overdraft == nil {
 		// unbounded overdraft: we send the required amount
 		actuallySentAmt = new(big.Int).Set(amount)
+	} else if s.fundsStack != nil {
+
+		// TODO test/handle overdraft
+
+		availableSenders := s.fundsStack.Pull(amount)
+
+		for _, sender := range availableSenders {
+			// TODO update cached asset
+
+			s.Postings = append(s.Postings, Posting{
+				Asset:       coloredAsset(s.CurrentAsset, &sender.Color),
+				Source:      sender.Name,
+				Destination: *account,
+				Amount:      sender.Amount,
+			})
+		}
+
+		// TODO what if we didn't pull enough? Would that be possible?
+
+		actuallySentAmt = new(big.Int).Set(amount)
+
 	} else {
 		balance := s.CachedBalances.fetchBalance(*account, coloredAsset(s.CurrentAsset, color))
 
@@ -597,7 +634,7 @@ func (s *programState) trySendingToAccount(accountLiteral parser.ValueExpr, amou
 		actuallySentAmt = utils.MinBigInt(safeSendAmt, amount)
 	}
 
-	s.pushSender(*account, actuallySentAmt, color)
+	s.pushSender(*account, actuallySentAmt, *color)
 	return actuallySentAmt, nil
 }
 
@@ -688,6 +725,24 @@ func (s *programState) trySendingUpTo(source parser.Source, amount *big.Int) (*b
 		}
 		return s.trySendingUpTo(source.From, cappedAmount)
 
+	case *parser.SourceThrough:
+		indexBefore := len(s.Senders)
+		leftAmt, err := s.trySendingUpTo(source.Source, amount)
+		if err != nil {
+			return nil, err
+		}
+
+		fs := newFundsStack(s.Senders[indexBefore:])
+		oldStack := s.fundsStack
+		s.fundsStack = &fs
+		defer func() {
+			s.fundsStack = oldStack
+		}()
+		s.Senders = s.Senders[0:indexBefore]
+
+		// TODO test new amt and new err
+		return s.trySendingUpTo(source.Proxy, leftAmt)
+
 	default:
 		utils.NonExhaustiveMatchPanic[any](source)
 		return nil, nil
diff --git a/internal/interpreter/interpreter_test.go b/internal/interpreter/interpreter_test.go
index e5c15368..3b06e3d6 100644
--- a/internal/interpreter/interpreter_test.go
+++ b/internal/interpreter/interpreter_test.go
@@ -4195,6 +4195,142 @@ func TestGetAmountFunction(t *testing.T) {
 	testWithFeatureFlag(t, tc, flags.ExperimentalGetAmountFunctionFeatureFlag)
 }
 
+func TestThroughSimple(t *testing.T) {
+
+	script := `
+ 		send [COIN 10] (
+			source = @a through @b
+			destination = @dest
+		)
+	`
+
+	tc := NewTestCase()
+	tc.compile(t, script)
+	tc.setBalance("a", "COIN", 999)
+	tc.expected = CaseResult{
+		Postings: []Posting{
+			{Source: "a", Destination: "b", Amount: big.NewInt(10), Asset: "COIN"},
+			{Source: "b", Destination: "dest", Amount: big.NewInt(10), Asset: "COIN"},
+		},
+		Error: nil,
+	}
+
+	test(t, tc)
+}
+
+func TestThroughNestedLeftSide(t *testing.T) {
+
+	script := `
+ 		send [COIN 10] (
+			source = {@a through @b} through @c
+			destination = @dest
+		)
+	`
+
+	tc := NewTestCase()
+	tc.compile(t, script)
+	tc.setBalance("a", "COIN", 999)
+	tc.expected = CaseResult{
+		Postings: []Posting{
+			{Source: "a", Destination: "b", Amount: big.NewInt(10), Asset: "COIN"},
+			{Source: "b", Destination: "c", Amount: big.NewInt(10), Asset: "COIN"},
+			{Source: "c", Destination: "dest", Amount: big.NewInt(10), Asset: "COIN"},
+		},
+		Error: nil,
+	}
+
+	test(t, tc)
+}
+
+func TestThroughNestedRightSide(t *testing.T) {
+
+	script := `
+ 		send [COIN 10] (
+			source = @a through {@b through @c}
+			destination = @dest
+		)
+	`
+
+	tc := NewTestCase()
+	tc.compile(t, script)
+	tc.setBalance("a", "COIN", 999)
+	tc.expected = CaseResult{
+		Postings: []Posting{
+			{Source: "a", Destination: "b", Amount: big.NewInt(10), Asset: "COIN"},
+			{Source: "b", Destination: "c", Amount: big.NewInt(10), Asset: "COIN"},
+			{Source: "c", Destination: "dest", Amount: big.NewInt(10), Asset: "COIN"},
+		},
+		Error: nil,
+	}
+
+	test(t, tc)
+}
+
+func TestThroughWithinInorder(t *testing.T) {
+	script := `
+ 		send [COIN 10] (
+			source = {
+				max [COIN 2] from @a allowing unbounded overdraft
+				@b through @proxy // balance=1
+				@world //left=7
+			}
+			destination = @dest
+		)
+	`
+
+	tc := NewTestCase()
+	tc.compile(t, script)
+	tc.setBalance("b", "COIN", 1)
+	tc.expected = CaseResult{
+		Postings: []Posting{
+			// TODO are we ok with this being the first one? is it always correct?
+			{Source: "b", Destination: "proxy", Amount: big.NewInt(1), Asset: "COIN"},
+
+			{Source: "a", Destination: "dest", Amount: big.NewInt(2), Asset: "COIN"},
+			{Source: "proxy", Destination: "dest", Amount: big.NewInt(1), Asset: "COIN"},
+			{Source: "world", Destination: "dest", Amount: big.NewInt(7), Asset: "COIN"},
+		},
+		Error: nil,
+	}
+
+	test(t, tc)
+}
+
+func TestThroughComplex(t *testing.T) {
+	script := `
+ 	send [USD/2 10] (
+		source = {
+			@a1 // balance: 5
+			@a2 // balance: 100
+		} through {
+			2/3 from @p1 // [USD/2 7]
+			1/3 from @p2 // [USD/2 3]
+		}
+		destination = @dest
+	)
+	`
+
+	tc := NewTestCase()
+	tc.compile(t, script)
+	tc.setBalance("a1", "USD/2", 5)
+	tc.setBalance("a2", "USD/2", 100)
+
+	tc.expected = CaseResult{
+		Postings: []Posting{
+			{Source: "a1", Destination: "p1", Amount: big.NewInt(5), Asset: "USD/2"},
+			{Source: "a2", Destination: "p1", Amount: big.NewInt(2), Asset: "USD/2"},
+
+			{Source: "a2", Destination: "p2", Amount: big.NewInt(3), Asset: "USD/2"},
+
+			{Source: "p1", Destination: "dest", Amount: big.NewInt(7), Asset: "USD/2"},
+			{Source: "p2", Destination: "dest", Amount: big.NewInt(3), Asset: "USD/2"},
+		},
+		Error: nil,
+	}
+
+	test(t, tc)
+}
+
 func TestColorSend(t *testing.T) {
 	script := `
  		send [COIN 100] (
diff --git a/internal/interpreter/reconciler.go b/internal/interpreter/reconciler.go
deleted file mode 100644
index bdd7567d..00000000
--- a/internal/interpreter/reconciler.go
+++ /dev/null
@@ -1,129 +0,0 @@
-package interpreter
-
-import (
-	"fmt"
-	"math/big"
-	"slices"
-)
-
-type Posting struct {
-	Source      string   `json:"source"`
-	Destination string   `json:"destination"`
-	Amount      *big.Int `json:"amount"`
-	Asset       string   `json:"asset"`
-}
-
-type ReconcileError struct {
-	Receiver  Receiver
-	Receivers []Receiver
-}
-
-func (e ReconcileError) Error() string {
-	return fmt.Sprintf("Error reconciling senders and getters (receiver = %#v ; receivers = %v)", e.Receiver, e.Receivers)
-}
-
-type Sender struct {
-	Name     string
-	Monetary *big.Int
-	Color    *string
-}
-
-type Receiver struct {
-	Name     string
-	Monetary *big.Int
-}
-
-func Reconcile(asset string, senders []Sender, receivers []Receiver) ([]Posting, InterpreterError) {
-
-	// We reverse senders and receivers once so that we can
-	// treat them as stack and push/pop in O(1)
-	slices.Reverse(senders)
-	slices.Reverse(receivers)
-	var postings []Posting
-
-	for {
-		receiver, empty := popStack(&receivers)
-		if empty {
-			break
-		}
-
-		// Ugly workaround
-		if receiver.Name == KEPT_ADDR {
-			sender, empty := popStack(&senders)
-			if !empty {
-				var newMon big.Int
-				newMon.Sub(sender.Monetary, receiver.Monetary)
-				senders = append(senders, Sender{
-					Name:     sender.Name,
-					Monetary: &newMon,
-				})
-			}
-			continue
-		}
-
-		sender, empty := popStack(&senders)
-		if empty {
-			isReceivedAmtZero := receiver.Monetary.Cmp(big.NewInt(0)) == 0
-			if isReceivedAmtZero {
-				return postings, nil
-			}
-
-			return postings, nil
-		}
-
-		snd := (*big.Int)(sender.Monetary)
-
-		var postingAmount big.Int
-		switch snd.Cmp(receiver.Monetary) {
-		case 0: /* sender.Monetary == receiver.Monetary */
-			postingAmount = *sender.Monetary
-		case -1: /* sender.Monetary < receiver.Monetary */
-			receivers = append(receivers, Receiver{
-				Name:     receiver.Name,
-				Monetary: new(big.Int).Sub(receiver.Monetary, sender.Monetary),
-			})
-			postingAmount = *sender.Monetary
-		case 1: /* sender.Monetary > receiver.Monetary */
-			senders = append(senders, Sender{
-				Name:     sender.Name,
-				Monetary: new(big.Int).Sub(sender.Monetary, receiver.Monetary),
-				Color:    sender.Color,
-			})
-			postingAmount = *receiver.Monetary
-		}
-
-		var postingToMerge *Posting
-		if len(postings) != 0 {
-			posting := &postings[len(postings)-1]
-			if posting.Source == sender.Name && posting.Destination == receiver.Name {
-				postingToMerge = posting
-			}
-		}
-
-		if postingToMerge == nil || postingToMerge.Asset != coloredAsset(asset, sender.Color) {
-			postings = append(postings, Posting{
-				Source:      sender.Name,
-				Destination: receiver.Name,
-				Amount:      &postingAmount,
-				Asset:       coloredAsset(asset, sender.Color),
-			})
-		} else {
-			// postingToMerge.Amount += postingAmount
-			postingToMerge.Amount.Add(postingToMerge.Amount, &postingAmount)
-		}
-	}
-
-	return postings, nil
-}
-
-func popStack[T any](stack *[]T) (T, bool) {
-	l := len(*stack)
-	if l == 0 {
-		var t T
-		return t, true
-	}
-
-	popped := (*stack)[l-1]
-	*stack = (*stack)[:l-1]
-	return popped, false
-}
diff --git a/internal/interpreter/reconciler_test.go b/internal/interpreter/reconciler_test.go
deleted file mode 100644
index 505b4b2e..00000000
--- a/internal/interpreter/reconciler_test.go
+++ /dev/null
@@ -1,218 +0,0 @@
-package interpreter
-
-import (
-	"math/big"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-type ReconcileTestCase struct {
-	Currency string
-
-	Senders     []Sender
-	Receivers   []Receiver
-	Expected    []Posting
-	ExpectedErr error
-}
-
-func runReconcileTestCase(t *testing.T, tc ReconcileTestCase) {
-	t.Parallel()
-	if tc.Currency == "" {
-		tc.Currency = "COIN"
-	}
-
-	got, err := Reconcile(tc.Currency, tc.Senders, tc.Receivers)
-
-	require.Equal(t, tc.ExpectedErr, err)
-	assert.Equal(t, tc.Expected, got)
-}
-
-func TestReconcileEmpty(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{})
-}
-
-func TestReconcileSingletonExactMatch(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency:  "COIN",
-		Senders:   []Sender{{"src", big.NewInt(10), nil}},
-		Receivers: []Receiver{{"dest", big.NewInt(10)}},
-		Expected:  []Posting{{"src", "dest", big.NewInt(10), "COIN"}},
-	})
-}
-
-func TestReconcileZero(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency:  "COIN",
-		Senders:   []Sender{{"src", big.NewInt(0), nil}},
-		Receivers: []Receiver{{"dest", big.NewInt(0)}},
-		Expected: []Posting{
-			{"src", "dest", big.NewInt(0), "COIN"},
-		},
-		ExpectedErr: nil,
-	})
-}
-
-func TestNoReceiversLeft(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Senders: []Sender{{
-			"src",
-			big.NewInt(10),
-			nil,
-		}},
-	})
-}
-
-func TestReconcileSendersRemainder(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "EUR",
-		Senders:  []Sender{{"src", big.NewInt(100), nil}},
-		Receivers: []Receiver{
-			{
-				"d1",
-				big.NewInt(70),
-			},
-			{
-				"d2",
-				big.NewInt(30),
-			}},
-		Expected: []Posting{
-			{"src", "d1", big.NewInt(70), "EUR"},
-			{"src", "d2", big.NewInt(30), "EUR"},
-		},
-	})
-}
-
-func TestReconcileWhenSendersAreSplit(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "EUR",
-		Senders: []Sender{
-			{"s1", big.NewInt(20), nil},
-			{"s2", big.NewInt(30), nil},
-		},
-		Receivers: []Receiver{{"d", big.NewInt(50)}},
-		Expected: []Posting{
-			{"s1", "d", big.NewInt(20), "EUR"},
-			{"s2", "d", big.NewInt(30), "EUR"},
-		},
-	})
-}
-
-func TestMany(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "EUR",
-		Senders: []Sender{
-			{"s1", big.NewInt(80 + 20), nil},
-			{"s2", big.NewInt(1000), nil},
-		},
-		Receivers: []Receiver{
-			{"d1", big.NewInt(80)},
-			{"d2", big.NewInt(20 + 123)},
-		},
-		Expected: []Posting{
-			{"s1", "d1", big.NewInt(80), "EUR"},
-			{"s1", "d2", big.NewInt(20), "EUR"},
-			{"s2", "d2", big.NewInt(123), "EUR"},
-		},
-	})
-}
-
-func TestReconcileManySendersManyReceivers(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "EUR",
-		Senders: []Sender{
-			{"s1", big.NewInt(80 + 20), nil},
-			{"s2", big.NewInt(1000), nil},
-		},
-		Receivers: []Receiver{
-			{"d1", big.NewInt(80)},
-			{"d2", big.NewInt(20 + 123)},
-		},
-		Expected: []Posting{
-			{"s1", "d1", big.NewInt(80), "EUR"},
-			{"s1", "d2", big.NewInt(20), "EUR"},
-			{"s2", "d2", big.NewInt(123), "EUR"},
-		},
-	})
-}
-
-func TestReconcileOverlapping(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "EUR",
-		Senders: []Sender{
-			{"src1", big.NewInt(1), nil},
-			{"src2", big.NewInt(10), nil},
-			{"src2", big.NewInt(20), nil},
-		},
-		Receivers: []Receiver{{"d", big.NewInt(31)}},
-		Expected: []Posting{
-			{"src1", "d", big.NewInt(1), "EUR"},
-			{"src2", "d", big.NewInt(30), "EUR"},
-		},
-	})
-}
-
-func TestReconcileKept(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "GEM",
-		Senders: []Sender{
-			{"src", big.NewInt(100), nil},
-		},
-		Receivers: []Receiver{
-			{"dest", big.NewInt(50)},
-			{"<kept>", big.NewInt(50)}},
-		Expected: []Posting{
-			{"src", "dest", big.NewInt(50), "GEM"},
-		},
-	})
-}
-
-func TestReconcileColoredAssetExactMatch(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "COIN",
-		Senders: []Sender{
-			{"src", big.NewInt(10), pointer("x")},
-		},
-		Receivers: []Receiver{{"dest", big.NewInt(10)}},
-		Expected:  []Posting{{"src", "dest", big.NewInt(10), "COIN_x"}},
-	})
-}
-
-func TestReconcileColoredManyDestPerSender(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "COIN",
-		Senders: []Sender{
-			{"src", big.NewInt(10), pointer("x")},
-		},
-		Receivers: []Receiver{
-			{"d1", big.NewInt(5)},
-			{"d2", big.NewInt(5)},
-		},
-		Expected: []Posting{
-			{"src", "d1", big.NewInt(5), "COIN_x"},
-			{"src", "d2", big.NewInt(5), "COIN_x"},
-		},
-	})
-}
-
-func TestReconcileColoredManySenderColors(t *testing.T) {
-	runReconcileTestCase(t, ReconcileTestCase{
-		Currency: "COIN",
-		Senders: []Sender{
-			{"src", big.NewInt(1), pointer("c1")},
-			{"src", big.NewInt(1), pointer("c2")},
-		},
-		Receivers: []Receiver{
-			{"dest", big.NewInt(2)},
-		},
-		Expected: []Posting{
-			{"src", "dest", big.NewInt(1), "COIN_c1"},
-			{"src", "dest", big.NewInt(1), "COIN_c2"},
-		},
-	})
-}
-
-func pointer[T any](x T) *T {
-	return &x
-}
diff --git a/internal/parser/__snapshots__/parser_test.snap b/internal/parser/__snapshots__/parser_test.snap
index 13841727..235836ac 100755
--- a/internal/parser/__snapshots__/parser_test.snap
+++ b/internal/parser/__snapshots__/parser_test.snap
@@ -3222,6 +3222,75 @@ parser.Program{
 }
 ---
 
+[TestThroughSimple - 1]
+parser.Program{
+    Vars:       (*parser.VarDeclarations)(nil),
+    Statements: {
+        &parser.SendStatement{
+            Range: parser.Range{
+                Start: parser.Position{Character:0, Line:1},
+                End:   parser.Position{Character:1, Line:4},
+            },
+            SentValue: &parser.SentValueLiteral{
+                Range: parser.Range{
+                    Start: parser.Position{Character:5, Line:1},
+                    End:   parser.Position{Character:9, Line:1},
+                },
+                Monetary: &parser.Variable{
+                    Range: parser.Range{
+                        Start: parser.Position{Character:5, Line:1},
+                        End:   parser.Position{Character:9, Line:1},
+                    },
+                    Name: "amt",
+                },
+            },
+            Source: &parser.SourceThrough{
+                Range: parser.Range{
+                    Start: parser.Position{Character:10, Line:2},
+                    End:   parser.Position{Character:23, Line:2},
+                },
+                Source: &parser.SourceAccount{
+                    Color:     nil,
+                    ValueExpr: &parser.AccountInterpLiteral{
+                        Range: parser.Range{
+                            Start: parser.Position{Character:10, Line:2},
+                            End:   parser.Position{Character:12, Line:2},
+                        },
+                        Parts: {
+                            parser.AccountTextPart{Name:"a"},
+                        },
+                    },
+                },
+                Proxy: &parser.SourceAccount{
+                    Color:     nil,
+                    ValueExpr: &parser.AccountInterpLiteral{
+                        Range: parser.Range{
+                            Start: parser.Position{Character:21, Line:2},
+                            End:   parser.Position{Character:23, Line:2},
+                        },
+                        Parts: {
+                            parser.AccountTextPart{Name:"b"},
+                        },
+                    },
+                },
+            },
+            Destination: &parser.DestinationAccount{
+                ValueExpr: &parser.AccountInterpLiteral{
+                    Range: parser.Range{
+                        Start: parser.Position{Character:15, Line:3},
+                        End:   parser.Position{Character:20, Line:3},
+                    },
+                    Parts: {
+                        parser.AccountTextPart{Name:"dest"},
+                    },
+                },
+            },
+        },
+    },
+    Comments: nil,
+}
+---
+
 [TestColorRestriction - 1]
 parser.Program{
     Vars:       (*parser.VarDeclarations)(nil),
diff --git a/internal/parser/antlrParser/Lexer.interp b/internal/parser/antlrParser/Lexer.interp
index b56a2642..bb0a33a0 100644
--- a/internal/parser/antlrParser/Lexer.interp
+++ b/internal/parser/antlrParser/Lexer.interp
@@ -17,6 +17,7 @@ null
 'unbounded'
 'overdraft'
 'oneof'
+'through'
 'kept'
 'save'
 '('
@@ -62,6 +63,7 @@ ALLOWING
 UNBOUNDED
 OVERDRAFT
 ONEOF
+THROUGH
 KEPT
 SAVE
 LPARENS
@@ -106,6 +108,7 @@ ALLOWING
 UNBOUNDED
 OVERDRAFT
 ONEOF
+THROUGH
 KEPT
 SAVE
 LPARENS
@@ -142,4 +145,4 @@ DEFAULT_MODE
 ACCOUNT_MODE
 
 atn:
-[4, 0, 42, 357, 6, -1, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 2, 20, 7, 20, 2, 21, 7, 21, 2, 22, 7, 22, 2, 23, 7, 23, 2, 24, 7, 24, 2, 25, 7, 25, 2, 26, 7, 26, 2, 27, 7, 27, 2, 28, 7, 28, 2, 29, 7, 29, 2, 30, 7, 30, 2, 31, 7, 31, 2, 32, 7, 32, 2, 33, 7, 33, 2, 34, 7, 34, 2, 35, 7, 35, 2, 36, 7, 36, 2, 37, 7, 37, 2, 38, 7, 38, 2, 39, 7, 39, 2, 40, 7, 40, 2, 41, 7, 41, 2, 42, 7, 42, 1, 0, 4, 0, 90, 8, 0, 11, 0, 12, 0, 91, 1, 0, 1, 0, 1, 1, 4, 1, 97, 8, 1, 11, 1, 12, 1, 98, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 106, 8, 2, 10, 2, 12, 2, 109, 9, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 3, 1, 3, 1, 3, 5, 3, 120, 8, 3, 10, 3, 12, 3, 123, 9, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 17, 1, 17, 1, 17, 1, 17, 1, 17, 1, 18, 1, 18, 1, 18, 1, 18, 1, 18, 1, 19, 1, 19, 1, 20, 1, 20, 1, 21, 1, 21, 1, 22, 1, 22, 1, 23, 1, 23, 1, 24, 1, 24, 1, 25, 1, 25, 1, 26, 1, 26, 1, 27, 1, 27, 1, 28, 1, 28, 1, 29, 1, 29, 1, 30, 1, 30, 1, 31, 1, 31, 1, 32, 4, 32, 255, 8, 32, 11, 32, 12, 32, 256, 1, 32, 1, 32, 4, 32, 261, 8, 32, 11, 32, 12, 32, 262, 3, 32, 265, 8, 32, 1, 32, 1, 32, 1, 33, 1, 33, 1, 33, 1, 33, 5, 33, 273, 8, 33, 10, 33, 12, 33, 276, 9, 33, 1, 33, 1, 33, 1, 34, 4, 34, 281, 8, 34, 11, 34, 12, 34, 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74, 37, 76, 38, 78, 39, 80, 40, 82, 0, 84, 41, 86, 42, 88, 43, 2, 0, 1, 10, 3, 0, 9, 10, 13, 13, 32, 32, 2, 0, 10, 10, 13, 13, 1, 0, 48, 57, 3, 0, 10, 10, 13, 13, 34, 34, 1, 0, 97, 122, 2, 0, 95, 95, 97, 122, 1, 0, 65, 90, 2, 0, 48, 57, 65, 90, 3, 0, 48, 57, 95, 95, 97, 122, 5, 0, 45, 45, 48, 57, 65, 90, 95, 95, 97, 122, 386, 0, 2, 1, 0, 0, 0, 0, 4, 1, 0, 0, 0, 0, 6, 1, 0, 0, 0, 0, 8, 1, 0, 0, 0, 0, 10, 1, 0, 0, 0, 0, 12, 1, 0, 0, 0, 0, 14, 1, 0, 0, 0, 0, 16, 1, 0, 0, 0, 0, 18, 1, 0, 0, 0, 0, 20, 1, 0, 0, 0, 0, 22, 1, 0, 0, 0, 0, 24, 1, 0, 0, 0, 0, 26, 1, 0, 0, 0, 0, 28, 1, 0, 0, 0, 0, 30, 1, 0, 0, 0, 0, 32, 1, 0, 0, 0, 0, 34, 1, 0, 0, 0, 0, 36, 1, 0, 0, 0, 0, 38, 1, 0, 0, 0, 0, 40, 1, 0, 0, 0, 0, 42, 1, 0, 0, 0, 0, 44, 1, 0, 0, 0, 0, 46, 1, 0, 0, 0, 0, 48, 1, 0, 0, 0, 0, 50, 1, 0, 0, 0, 0, 52, 1, 0, 0, 0, 0, 54, 1, 0, 0, 0, 0, 56, 1, 0, 0, 0, 0, 58, 1, 0, 0, 0, 0, 60, 1, 0, 0, 0, 0, 62, 1, 0, 0, 0, 0, 64, 1, 0, 0, 0, 0, 66, 1, 0, 0, 0, 0, 68, 1, 0, 0, 0, 0, 70, 1, 0, 0, 0, 0, 72, 1, 0, 0, 0, 0, 74, 1, 0, 0, 0, 0, 76, 1, 0, 0, 0, 0, 78, 1, 0, 0, 0, 0, 80, 1, 0, 0, 0, 0, 88, 1, 0, 0, 0, 1, 84, 1, 0, 0, 0, 1, 86, 1, 0, 0, 0, 2, 91, 1, 0, 0, 0, 4, 98, 1, 0, 0, 0, 6, 102, 1, 0, 0, 0, 8, 117, 1, 0, 0, 0, 10, 130, 1, 0, 0, 0, 12, 135, 1, 0, 0, 0, 14, 139, 1, 0, 0, 0, 16, 146, 1, 0, 0, 0, 18, 158, 1, 0, 0, 0, 20, 163, 1, 0, 0, 0, 22, 168, 1, 0, 0, 0, 24, 171, 1, 0, 0, 0, 26, 174, 1, 0, 0, 0, 28, 184, 1, 0, 0, 0, 30, 193, 1, 0, 0, 0, 32, 203, 1, 0, 0, 0, 34, 213, 1, 0, 0, 0, 36, 219, 1, 0, 0, 0, 38, 227, 1, 0, 0, 0, 40, 232, 1, 0, 0, 0, 42, 237, 1, 0, 0, 0, 44, 239, 1, 0, 0, 0, 46, 241, 1, 0, 0, 0, 48, 243, 1, 0, 0, 0, 50, 245, 1, 0, 0, 0, 52, 247, 1, 0, 0, 0, 54, 249, 1, 0, 0, 0, 56, 251, 1, 0, 0, 0, 58, 253, 1, 0, 0, 0, 60, 255, 1, 0, 0, 0, 62, 257, 1, 0, 0, 0, 64, 259, 1, 0, 0, 0, 66, 261, 1, 0, 0, 0, 68, 264, 1, 0, 0, 0, 70, 278, 1, 0, 0, 0, 72, 290, 1, 0, 0, 0, 74, 301, 1, 0, 0, 0, 76, 319, 1, 0, 0, 0, 78, 334, 1, 0, 0, 0, 80, 338, 1, 0, 0, 0, 82, 342, 1, 0, 0, 0, 84, 355, 1, 0, 0, 0, 86, 361, 1, 0, 0, 0, 88, 365, 1, 0, 0, 0, 90, 92, 7, 0, 0, 0, 91, 90, 1, 0, 0, 0, 92, 93, 1, 0, 0, 0, 93, 91, 1, 0, 0, 0, 93, 94, 1, 0, 0, 0, 94, 95, 1, 0, 0, 0, 95, 96, 6, 0, 0, 0, 96, 3, 1, 0, 0, 0, 97, 99, 7, 1, 0, 0, 98, 97, 1, 0, 0, 0, 99, 100, 1, 0, 0, 0, 100, 98, 1, 0, 0, 0, 100, 101, 1, 0, 0, 0, 101, 5, 1, 0, 0, 0, 102, 103, 5, 47, 0, 0, 103, 104, 5, 42, 0, 0, 104, 109, 1, 0, 0, 0, 105, 108, 3, 6, 2, 0, 106, 108, 9, 0, 0, 0, 107, 105, 1, 0, 0, 0, 107, 106, 1, 0, 0, 0, 108, 111, 1, 0, 0, 0, 109, 110, 1, 0, 0, 0, 109, 107, 1, 0, 0, 0, 110, 112, 1, 0, 0, 0, 111, 109, 1, 0, 0, 0, 112, 113, 5, 42, 0, 0, 113, 114, 5, 47, 0, 0, 114, 115, 1, 0, 0, 0, 115, 116, 6, 2, 0, 0, 116, 7, 1, 0, 0, 0, 117, 118, 5, 47, 0, 0, 118, 119, 5, 47, 0, 0, 119, 123, 1, 0, 0, 0, 120, 122, 9, 0, 0, 0, 121, 120, 1, 0, 0, 0, 122, 125, 1, 0, 0, 0, 123, 124, 1, 0, 0, 0, 123, 121, 1, 0, 0, 0, 124, 126, 1, 0, 0, 0, 125, 123, 1, 0, 0, 0, 126, 127, 3, 4, 1, 0, 127, 128, 1, 0, 0, 0, 128, 129, 6, 3, 1, 0, 129, 9, 1, 0, 0, 0, 130, 131, 5, 118, 0, 0, 131, 132, 5, 97, 0, 0, 132, 133, 5, 114, 0, 0, 133, 134, 5, 115, 0, 0, 134, 11, 1, 0, 0, 0, 135, 136, 5, 109, 0, 0, 136, 137, 5, 97, 0, 0, 137, 138, 5, 120, 0, 0, 138, 13, 1, 0, 0, 0, 139, 140, 5, 115, 0, 0, 140, 141, 5, 111, 0, 0, 141, 142, 5, 117, 0, 0, 142, 143, 5, 114, 0, 0, 143, 144, 5, 99, 0, 0, 144, 145, 5, 101, 0, 0, 145, 15, 1, 0, 0, 0, 146, 147, 5, 100, 0, 0, 147, 148, 5, 101, 0, 0, 148, 149, 5, 115, 0, 0, 149, 150, 5, 116, 0, 0, 150, 151, 5, 105, 0, 0, 151, 152, 5, 110, 0, 0, 152, 153, 5, 97, 0, 0, 153, 154, 5, 116, 0, 0, 154, 155, 5, 105, 0, 0, 155, 156, 5, 111, 0, 0, 156, 157, 5, 110, 0, 0, 157, 17, 1, 0, 0, 0, 158, 159, 5, 115, 0, 0, 159, 160, 5, 101, 0, 0, 160, 161, 5, 110, 0, 0, 161, 162, 5, 100, 0, 0, 162, 19, 1, 0, 0, 0, 163, 164, 5, 102, 0, 0, 164, 165, 5, 114, 0, 0, 165, 166, 5, 111, 0, 0, 166, 167, 5, 109, 0, 0, 167, 21, 1, 0, 0, 0, 168, 169, 5, 117, 0, 0, 169, 170, 5, 112, 0, 0, 170, 23, 1, 0, 0, 0, 171, 172, 5, 116, 0, 0, 172, 173, 5, 111, 0, 0, 173, 25, 1, 0, 0, 0, 174, 175, 5, 114, 0, 0, 175, 176, 5, 101, 0, 0, 176, 177, 5, 109, 0, 0, 177, 178, 5, 97, 0, 0, 178, 179, 5, 105, 0, 0, 179, 180, 5, 110, 0, 0, 180, 181, 5, 105, 0, 0, 181, 182, 5, 110, 0, 0, 182, 183, 5, 103, 0, 0, 183, 27, 1, 0, 0, 0, 184, 185, 5, 97, 0, 0, 185, 186, 5, 108, 0, 0, 186, 187, 5, 108, 0, 0, 187, 188, 5, 111, 0, 0, 188, 189, 5, 119, 0, 0, 189, 190, 5, 105, 0, 0, 190, 191, 5, 110, 0, 0, 191, 192, 5, 103, 0, 0, 192, 29, 1, 0, 0, 0, 193, 194, 5, 117, 0, 0, 194, 195, 5, 110, 0, 0, 195, 196, 5, 98, 0, 0, 196, 197, 5, 111, 0, 0, 197, 198, 5, 117, 0, 0, 198, 199, 5, 110, 0, 0, 199, 200, 5, 100, 0, 0, 200, 201, 5, 101, 0, 0, 201, 202, 5, 100, 0, 0, 202, 31, 1, 0, 0, 0, 203, 204, 5, 111, 0, 0, 204, 205, 5, 118, 0, 0, 205, 206, 5, 101, 0, 0, 206, 207, 5, 114, 0, 0, 207, 208, 5, 100, 0, 0, 208, 209, 5, 114, 0, 0, 209, 210, 5, 97, 0, 0, 210, 211, 5, 102, 0, 0, 211, 212, 5, 116, 0, 0, 212, 33, 1, 0, 0, 0, 213, 214, 5, 111, 0, 0, 214, 215, 5, 110, 0, 0, 215, 216, 5, 101, 0, 0, 216, 217, 5, 111, 0, 0, 217, 218, 5, 102, 0, 0, 218, 35, 1, 0, 0, 0, 219, 220, 5, 116, 0, 0, 220, 221, 5, 104, 0, 0, 221, 222, 5, 114, 0, 0, 222, 223, 5, 111, 0, 0, 223, 224, 5, 117, 0, 0, 224, 225, 5, 103, 0, 0, 225, 226, 5, 104, 0, 0, 226, 37, 1, 0, 0, 0, 227, 228, 5, 107, 0, 0, 228, 229, 5, 101, 0, 0, 229, 230, 5, 112, 0, 0, 230, 231, 5, 116, 0, 0, 231, 39, 1, 0, 0, 0, 232, 233, 5, 115, 0, 0, 233, 234, 5, 97, 0, 0, 234, 235, 5, 118, 0, 0, 235, 236, 5, 101, 0, 0, 236, 41, 1, 0, 0, 0, 237, 238, 5, 40, 0, 0, 238, 43, 1, 0, 0, 0, 239, 240, 5, 41, 0, 0, 240, 45, 1, 0, 0, 0, 241, 242, 5, 91, 0, 0, 242, 47, 1, 0, 0, 0, 243, 244, 5, 93, 0, 0, 244, 49, 1, 0, 0, 0, 245, 246, 5, 123, 0, 0, 246, 51, 1, 0, 0, 0, 247, 248, 5, 125, 0, 0, 248, 53, 1, 0, 0, 0, 249, 250, 5, 44, 0, 0, 250, 55, 1, 0, 0, 0, 251, 252, 5, 61, 0, 0, 252, 57, 1, 0, 0, 0, 253, 254, 5, 42, 0, 0, 254, 59, 1, 0, 0, 0, 255, 256, 5, 43, 0, 0, 256, 61, 1, 0, 0, 0, 257, 258, 5, 45, 0, 0, 258, 63, 1, 0, 0, 0, 259, 260, 5, 47, 0, 0, 260, 65, 1, 0, 0, 0, 261, 262, 5, 92, 0, 0, 262, 67, 1, 0, 0, 0, 263, 265, 7, 2, 0, 0, 264, 263, 1, 0, 0, 0, 265, 266, 1, 0, 0, 0, 266, 264, 1, 0, 0, 0, 266, 267, 1, 0, 0, 0, 267, 274, 1, 0, 0, 0, 268, 270, 5, 46, 0, 0, 269, 271, 7, 2, 0, 0, 270, 269, 1, 0, 0, 0, 271, 272, 1, 0, 0, 0, 272, 270, 1, 0, 0, 0, 272, 273, 1, 0, 0, 0, 273, 275, 1, 0, 0, 0, 274, 268, 1, 0, 0, 0, 274, 275, 1, 0, 0, 0, 275, 276, 1, 0, 0, 0, 276, 277, 5, 37, 0, 0, 277, 69, 1, 0, 0, 0, 278, 284, 5, 34, 0, 0, 279, 280, 5, 92, 0, 0, 280, 283, 5, 34, 0, 0, 281, 283, 8, 3, 0, 0, 282, 279, 1, 0, 0, 0, 282, 281, 1, 0, 0, 0, 283, 286, 1, 0, 0, 0, 284, 282, 1, 0, 0, 0, 284, 285, 1, 0, 0, 0, 285, 287, 1, 0, 0, 0, 286, 284, 1, 0, 0, 0, 287, 288, 5, 34, 0, 0, 288, 71, 1, 0, 0, 0, 289, 291, 7, 4, 0, 0, 290, 289, 1, 0, 0, 0, 291, 292, 1, 0, 0, 0, 292, 290, 1, 0, 0, 0, 292, 293, 1, 0, 0, 0, 293, 297, 1, 0, 0, 0, 294, 296, 7, 5, 0, 0, 295, 294, 1, 0, 0, 0, 296, 299, 1, 0, 0, 0, 297, 295, 1, 0, 0, 0, 297, 298, 1, 0, 0, 0, 298, 73, 1, 0, 0, 0, 299, 297, 1, 0, 0, 0, 300, 302, 3, 62, 30, 0, 301, 300, 1, 0, 0, 0, 301, 302, 1, 0, 0, 0, 302, 304, 1, 0, 0, 0, 303, 305, 7, 2, 0, 0, 304, 303, 1, 0, 0, 0, 305, 306, 1, 0, 0, 0, 306, 304, 1, 0, 0, 0, 306, 307, 1, 0, 0, 0, 307, 316, 1, 0, 0, 0, 308, 310, 5, 95, 0, 0, 309, 311, 7, 2, 0, 0, 310, 309, 1, 0, 0, 0, 311, 312, 1, 0, 0, 0, 312, 310, 1, 0, 0, 0, 312, 313, 1, 0, 0, 0, 313, 315, 1, 0, 0, 0, 314, 308, 1, 0, 0, 0, 315, 318, 1, 0, 0, 0, 316, 314, 1, 0, 0, 0, 316, 317, 1, 0, 0, 0, 317, 75, 1, 0, 0, 0, 318, 316, 1, 0, 0, 0, 319, 323, 7, 6, 0, 0, 320, 322, 7, 7, 0, 0, 321, 320, 1, 0, 0, 0, 322, 325, 1, 0, 0, 0, 323, 321, 1, 0, 0, 0, 323, 324, 1, 0, 0, 0, 324, 332, 1, 0, 0, 0, 325, 323, 1, 0, 0, 0, 326, 328, 5, 47, 0, 0, 327, 329, 7, 2, 0, 0, 328, 327, 1, 0, 0, 0, 329, 330, 1, 0, 0, 0, 330, 328, 1, 0, 0, 0, 330, 331, 1, 0, 0, 0, 331, 333, 1, 0, 0, 0, 332, 326, 1, 0, 0, 0, 332, 333, 1, 0, 0, 0, 333, 77, 1, 0, 0, 0, 334, 335, 5, 64, 0, 0, 335, 336, 1, 0, 0, 0, 336, 337, 6, 38, 2, 0, 337, 79, 1, 0, 0, 0, 338, 339, 5, 58, 0, 0, 339, 340, 1, 0, 0, 0, 340, 341, 6, 39, 2, 0, 341, 81, 1, 0, 0, 0, 342, 344, 5, 36, 0, 0, 343, 345, 7, 5, 0, 0, 344, 343, 1, 0, 0, 0, 345, 346, 1, 0, 0, 0, 346, 344, 1, 0, 0, 0, 346, 347, 1, 0, 0, 0, 347, 351, 1, 0, 0, 0, 348, 350, 7, 8, 0, 0, 349, 348, 1, 0, 0, 0, 350, 353, 1, 0, 0, 0, 351, 349, 1, 0, 0, 0, 351, 352, 1, 0, 0, 0, 352, 83, 1, 0, 0, 0, 353, 351, 1, 0, 0, 0, 354, 356, 7, 9, 0, 0, 355, 354, 1, 0, 0, 0, 356, 357, 1, 0, 0, 0, 357, 355, 1, 0, 0, 0, 357, 358, 1, 0, 0, 0, 358, 359, 1, 0, 0, 0, 359, 360, 6, 41, 3, 0, 360, 85, 1, 0, 0, 0, 361, 362, 3, 82, 40, 0, 362, 363, 1, 0, 0, 0, 363, 364, 6, 42, 3, 0, 364, 87, 1, 0, 0, 0, 365, 366, 3, 82, 40, 0, 366, 89, 1, 0, 0, 0, 24, 0, 1, 93, 100, 107, 109, 123, 266, 272, 274, 282, 284, 292, 297, 301, 306, 312, 316, 323, 330, 332, 346, 351, 357, 4, 6, 0, 0, 0, 1, 0, 5, 1, 0, 4, 0, 0]
\ No newline at end of file
diff --git a/internal/parser/antlrParser/Lexer.tokens b/internal/parser/antlrParser/Lexer.tokens
index 5fea9de1..562f5ca4 100644
--- a/internal/parser/antlrParser/Lexer.tokens
+++ b/internal/parser/antlrParser/Lexer.tokens
@@ -15,31 +15,32 @@ ALLOWING=14
 UNBOUNDED=15
 OVERDRAFT=16
 ONEOF=17
-KEPT=18
-SAVE=19
-LPARENS=20
-RPARENS=21
-LBRACKET=22
-RBRACKET=23
-LBRACE=24
-RBRACE=25
-COMMA=26
-EQ=27
-STAR=28
-PLUS=29
-MINUS=30
-DIV=31
-RESTRICT=32
-PERCENTAGE_PORTION_LITERAL=33
-STRING=34
-IDENTIFIER=35
-NUMBER=36
-ASSET=37
-ACCOUNT_START=38
-COLON=39
-ACCOUNT_TEXT=40
-VARIABLE_NAME_ACC=41
-VARIABLE_NAME=42
+THROUGH=18
+KEPT=19
+SAVE=20
+LPARENS=21
+RPARENS=22
+LBRACKET=23
+RBRACKET=24
+LBRACE=25
+RBRACE=26
+COMMA=27
+EQ=28
+STAR=29
+PLUS=30
+MINUS=31
+DIV=32
+RESTRICT=33
+PERCENTAGE_PORTION_LITERAL=34
+STRING=35
+IDENTIFIER=36
+NUMBER=37
+ASSET=38
+ACCOUNT_START=39
+COLON=40
+ACCOUNT_TEXT=41
+VARIABLE_NAME_ACC=42
+VARIABLE_NAME=43
 'vars'=5
 'max'=6
 'source'=7
@@ -53,20 +54,21 @@ VARIABLE_NAME=42
 'unbounded'=15
 'overdraft'=16
 'oneof'=17
-'kept'=18
-'save'=19
-'('=20
-')'=21
-'['=22
-']'=23
-'{'=24
-'}'=25
-','=26
-'='=27
-'*'=28
-'+'=29
-'-'=30
-'/'=31
-'\\'=32
-'@'=38
-':'=39
+'through'=18
+'kept'=19
+'save'=20
+'('=21
+')'=22
+'['=23
+']'=24
+'{'=25
+'}'=26
+','=27
+'='=28
+'*'=29
+'+'=30
+'-'=31
+'/'=32
+'\\'=33
+'@'=39
+':'=40
diff --git a/internal/parser/antlrParser/Numscript.interp b/internal/parser/antlrParser/Numscript.interp
index 2d4b94b0..11fa574c 100644
--- a/internal/parser/antlrParser/Numscript.interp
+++ b/internal/parser/antlrParser/Numscript.interp
@@ -17,6 +17,7 @@ null
 'unbounded'
 'overdraft'
 'oneof'
+'through'
 'kept'
 'save'
 '('
@@ -62,6 +63,7 @@ ALLOWING
 UNBOUNDED
 OVERDRAFT
 ONEOF
+THROUGH
 KEPT
 SAVE
 LPARENS
@@ -112,4 +114,4 @@ statement
 
 
 atn:
-[4, 1, 42, 267, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 3, 1, 48, 8, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 58, 8, 2, 10, 2, 12, 2, 61, 9, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 71, 8, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 79, 8, 2, 10, 2, 12, 2, 82, 9, 2, 1, 3, 1, 3, 1, 3, 5, 3, 87, 8, 3, 10, 3, 12, 3, 90, 9, 3, 1, 4, 1, 4, 1, 4, 3, 4, 95, 8, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 3, 6, 105, 8, 6, 1, 7, 1, 7, 1, 7, 5, 7, 110, 8, 7, 10, 7, 12, 7, 113, 9, 7, 1, 7, 1, 7, 1, 8, 3, 8, 118, 8, 8, 1, 8, 5, 8, 121, 8, 8, 10, 8, 12, 8, 124, 9, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 3, 10, 135, 8, 10, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 3, 12, 142, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 150, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 160, 8, 12, 1, 12, 1, 12, 4, 12, 164, 8, 12, 11, 12, 12, 12, 165, 1, 12, 1, 12, 1, 12, 1, 12, 5, 12, 172, 8, 12, 10, 12, 12, 12, 175, 9, 12, 1, 12, 1, 12, 1, 12, 1, 12, 4, 12, 181, 8, 12, 11, 12, 12, 12, 182, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 192, 8, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 3, 14, 201, 8, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 4, 16, 210, 8, 16, 11, 16, 12, 16, 211, 1, 16, 1, 16, 1, 16, 1, 16, 5, 16, 218, 8, 16, 10, 16, 12, 16, 221, 9, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 5, 16, 230, 8, 16, 10, 16, 12, 16, 233, 9, 16, 1, 16, 1, 16, 1, 16, 1, 16, 3, 16, 239, 8, 16, 1, 17, 1, 17, 1, 17, 1, 18, 1, 18, 3, 18, 246, 8, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 3, 19, 265, 8, 19, 1, 19, 0, 1, 4, 20, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 0, 2, 1, 0, 29, 30, 2, 0, 16, 16, 35, 35, 287, 0, 40, 1, 0, 0, 0, 2, 47, 1, 0, 0, 0, 4, 70, 1, 0, 0, 0, 6, 83, 1, 0, 0, 0, 8, 91, 1, 0, 0, 0, 10, 98, 1, 0, 0, 0, 12, 101, 1, 0, 0, 0, 14, 106, 1, 0, 0, 0, 16, 117, 1, 0, 0, 0, 18, 127, 1, 0, 0, 0, 20, 134, 1, 0, 0, 0, 22, 136, 1, 0, 0, 0, 24, 191, 1, 0, 0, 0, 26, 193, 1, 0, 0, 0, 28, 200, 1, 0, 0, 0, 30, 202, 1, 0, 0, 0, 32, 238, 1, 0, 0, 0, 34, 240, 1, 0, 0, 0, 36, 245, 1, 0, 0, 0, 38, 264, 1, 0, 0, 0, 40, 41, 5, 22, 0, 0, 41, 42, 3, 4, 2, 0, 42, 43, 3, 4, 2, 0, 43, 44, 5, 23, 0, 0, 44, 1, 1, 0, 0, 0, 45, 48, 5, 40, 0, 0, 46, 48, 5, 41, 0, 0, 47, 45, 1, 0, 0, 0, 47, 46, 1, 0, 0, 0, 48, 3, 1, 0, 0, 0, 49, 50, 6, 2, -1, 0, 50, 71, 5, 42, 0, 0, 51, 71, 5, 37, 0, 0, 52, 71, 5, 34, 0, 0, 53, 54, 5, 38, 0, 0, 54, 59, 3, 2, 1, 0, 55, 56, 5, 39, 0, 0, 56, 58, 3, 2, 1, 0, 57, 55, 1, 0, 0, 0, 58, 61, 1, 0, 0, 0, 59, 57, 1, 0, 0, 0, 59, 60, 1, 0, 0, 0, 60, 71, 1, 0, 0, 0, 61, 59, 1, 0, 0, 0, 62, 71, 5, 36, 0, 0, 63, 71, 5, 33, 0, 0, 64, 71, 3, 0, 0, 0, 65, 66, 5, 20, 0, 0, 66, 67, 3, 4, 2, 0, 67, 68, 5, 21, 0, 0, 68, 71, 1, 0, 0, 0, 69, 71, 3, 8, 4, 0, 70, 49, 1, 0, 0, 0, 70, 51, 1, 0, 0, 0, 70, 52, 1, 0, 0, 0, 70, 53, 1, 0, 0, 0, 70, 62, 1, 0, 0, 0, 70, 63, 1, 0, 0, 0, 70, 64, 1, 0, 0, 0, 70, 65, 1, 0, 0, 0, 70, 69, 1, 0, 0, 0, 71, 80, 1, 0, 0, 0, 72, 73, 10, 4, 0, 0, 73, 74, 5, 31, 0, 0, 74, 79, 3, 4, 2, 5, 75, 76, 10, 3, 0, 0, 76, 77, 7, 0, 0, 0, 77, 79, 3, 4, 2, 4, 78, 72, 1, 0, 0, 0, 78, 75, 1, 0, 0, 0, 79, 82, 1, 0, 0, 0, 80, 78, 1, 0, 0, 0, 80, 81, 1, 0, 0, 0, 81, 5, 1, 0, 0, 0, 82, 80, 1, 0, 0, 0, 83, 88, 3, 4, 2, 0, 84, 85, 5, 26, 0, 0, 85, 87, 3, 4, 2, 0, 86, 84, 1, 0, 0, 0, 87, 90, 1, 0, 0, 0, 88, 86, 1, 0, 0, 0, 88, 89, 1, 0, 0, 0, 89, 7, 1, 0, 0, 0, 90, 88, 1, 0, 0, 0, 91, 92, 7, 1, 0, 0, 92, 94, 5, 20, 0, 0, 93, 95, 3, 6, 3, 0, 94, 93, 1, 0, 0, 0, 94, 95, 1, 0, 0, 0, 95, 96, 1, 0, 0, 0, 96, 97, 5, 21, 0, 0, 97, 9, 1, 0, 0, 0, 98, 99, 5, 27, 0, 0, 99, 100, 3, 4, 2, 0, 100, 11, 1, 0, 0, 0, 101, 102, 5, 35, 0, 0, 102, 104, 5, 42, 0, 0, 103, 105, 3, 10, 5, 0, 104, 103, 1, 0, 0, 0, 104, 105, 1, 0, 0, 0, 105, 13, 1, 0, 0, 0, 106, 107, 5, 5, 0, 0, 107, 111, 5, 24, 0, 0, 108, 110, 3, 12, 6, 0, 109, 108, 1, 0, 0, 0, 110, 113, 1, 0, 0, 0, 111, 109, 1, 0, 0, 0, 111, 112, 1, 0, 0, 0, 112, 114, 1, 0, 0, 0, 113, 111, 1, 0, 0, 0, 114, 115, 5, 25, 0, 0, 115, 15, 1, 0, 0, 0, 116, 118, 3, 14, 7, 0, 117, 116, 1, 0, 0, 0, 117, 118, 1, 0, 0, 0, 118, 122, 1, 0, 0, 0, 119, 121, 3, 38, 19, 0, 120, 119, 1, 0, 0, 0, 121, 124, 1, 0, 0, 0, 122, 120, 1, 0, 0, 0, 122, 123, 1, 0, 0, 0, 123, 125, 1, 0, 0, 0, 124, 122, 1, 0, 0, 0, 125, 126, 5, 0, 0, 1, 126, 17, 1, 0, 0, 0, 127, 128, 5, 22, 0, 0, 128, 129, 3, 4, 2, 0, 129, 130, 5, 28, 0, 0, 130, 131, 5, 23, 0, 0, 131, 19, 1, 0, 0, 0, 132, 135, 3, 4, 2, 0, 133, 135, 5, 13, 0, 0, 134, 132, 1, 0, 0, 0, 134, 133, 1, 0, 0, 0, 135, 21, 1, 0, 0, 0, 136, 137, 5, 32, 0, 0, 137, 138, 3, 4, 2, 0, 138, 23, 1, 0, 0, 0, 139, 141, 3, 4, 2, 0, 140, 142, 3, 22, 11, 0, 141, 140, 1, 0, 0, 0, 141, 142, 1, 0, 0, 0, 142, 143, 1, 0, 0, 0, 143, 144, 5, 14, 0, 0, 144, 145, 5, 15, 0, 0, 145, 146, 5, 16, 0, 0, 146, 192, 1, 0, 0, 0, 147, 149, 3, 4, 2, 0, 148, 150, 3, 22, 11, 0, 149, 148, 1, 0, 0, 0, 149, 150, 1, 0, 0, 0, 150, 151, 1, 0, 0, 0, 151, 152, 5, 14, 0, 0, 152, 153, 5, 16, 0, 0, 153, 154, 5, 11, 0, 0, 154, 155, 5, 12, 0, 0, 155, 156, 3, 4, 2, 0, 156, 192, 1, 0, 0, 0, 157, 159, 3, 4, 2, 0, 158, 160, 3, 22, 11, 0, 159, 158, 1, 0, 0, 0, 159, 160, 1, 0, 0, 0, 160, 192, 1, 0, 0, 0, 161, 163, 5, 24, 0, 0, 162, 164, 3, 26, 13, 0, 163, 162, 1, 0, 0, 0, 164, 165, 1, 0, 0, 0, 165, 163, 1, 0, 0, 0, 165, 166, 1, 0, 0, 0, 166, 167, 1, 0, 0, 0, 167, 168, 5, 25, 0, 0, 168, 192, 1, 0, 0, 0, 169, 173, 5, 24, 0, 0, 170, 172, 3, 24, 12, 0, 171, 170, 1, 0, 0, 0, 172, 175, 1, 0, 0, 0, 173, 171, 1, 0, 0, 0, 173, 174, 1, 0, 0, 0, 174, 176, 1, 0, 0, 0, 175, 173, 1, 0, 0, 0, 176, 192, 5, 25, 0, 0, 177, 178, 5, 17, 0, 0, 178, 180, 5, 24, 0, 0, 179, 181, 3, 24, 12, 0, 180, 179, 1, 0, 0, 0, 181, 182, 1, 0, 0, 0, 182, 180, 1, 0, 0, 0, 182, 183, 1, 0, 0, 0, 183, 184, 1, 0, 0, 0, 184, 185, 5, 25, 0, 0, 185, 192, 1, 0, 0, 0, 186, 187, 5, 6, 0, 0, 187, 188, 3, 4, 2, 0, 188, 189, 5, 10, 0, 0, 189, 190, 3, 24, 12, 0, 190, 192, 1, 0, 0, 0, 191, 139, 1, 0, 0, 0, 191, 147, 1, 0, 0, 0, 191, 157, 1, 0, 0, 0, 191, 161, 1, 0, 0, 0, 191, 169, 1, 0, 0, 0, 191, 177, 1, 0, 0, 0, 191, 186, 1, 0, 0, 0, 192, 25, 1, 0, 0, 0, 193, 194, 3, 20, 10, 0, 194, 195, 5, 10, 0, 0, 195, 196, 3, 24, 12, 0, 196, 27, 1, 0, 0, 0, 197, 198, 5, 12, 0, 0, 198, 201, 3, 32, 16, 0, 199, 201, 5, 18, 0, 0, 200, 197, 1, 0, 0, 0, 200, 199, 1, 0, 0, 0, 201, 29, 1, 0, 0, 0, 202, 203, 5, 6, 0, 0, 203, 204, 3, 4, 2, 0, 204, 205, 3, 28, 14, 0, 205, 31, 1, 0, 0, 0, 206, 239, 3, 4, 2, 0, 207, 209, 5, 24, 0, 0, 208, 210, 3, 34, 17, 0, 209, 208, 1, 0, 0, 0, 210, 211, 1, 0, 0, 0, 211, 209, 1, 0, 0, 0, 211, 212, 1, 0, 0, 0, 212, 213, 1, 0, 0, 0, 213, 214, 5, 25, 0, 0, 214, 239, 1, 0, 0, 0, 215, 219, 5, 24, 0, 0, 216, 218, 3, 30, 15, 0, 217, 216, 1, 0, 0, 0, 218, 221, 1, 0, 0, 0, 219, 217, 1, 0, 0, 0, 219, 220, 1, 0, 0, 0, 220, 222, 1, 0, 0, 0, 221, 219, 1, 0, 0, 0, 222, 223, 5, 13, 0, 0, 223, 224, 3, 28, 14, 0, 224, 225, 5, 25, 0, 0, 225, 239, 1, 0, 0, 0, 226, 227, 5, 17, 0, 0, 227, 231, 5, 24, 0, 0, 228, 230, 3, 30, 15, 0, 229, 228, 1, 0, 0, 0, 230, 233, 1, 0, 0, 0, 231, 229, 1, 0, 0, 0, 231, 232, 1, 0, 0, 0, 232, 234, 1, 0, 0, 0, 233, 231, 1, 0, 0, 0, 234, 235, 5, 13, 0, 0, 235, 236, 3, 28, 14, 0, 236, 237, 5, 25, 0, 0, 237, 239, 1, 0, 0, 0, 238, 206, 1, 0, 0, 0, 238, 207, 1, 0, 0, 0, 238, 215, 1, 0, 0, 0, 238, 226, 1, 0, 0, 0, 239, 33, 1, 0, 0, 0, 240, 241, 3, 20, 10, 0, 241, 242, 3, 28, 14, 0, 242, 35, 1, 0, 0, 0, 243, 246, 3, 4, 2, 0, 244, 246, 3, 18, 9, 0, 245, 243, 1, 0, 0, 0, 245, 244, 1, 0, 0, 0, 246, 37, 1, 0, 0, 0, 247, 248, 5, 9, 0, 0, 248, 249, 3, 36, 18, 0, 249, 250, 5, 20, 0, 0, 250, 251, 5, 7, 0, 0, 251, 252, 5, 27, 0, 0, 252, 253, 3, 24, 12, 0, 253, 254, 5, 8, 0, 0, 254, 255, 5, 27, 0, 0, 255, 256, 3, 32, 16, 0, 256, 257, 5, 21, 0, 0, 257, 265, 1, 0, 0, 0, 258, 259, 5, 19, 0, 0, 259, 260, 3, 36, 18, 0, 260, 261, 5, 10, 0, 0, 261, 262, 3, 4, 2, 0, 262, 265, 1, 0, 0, 0, 263, 265, 3, 8, 4, 0, 264, 247, 1, 0, 0, 0, 264, 258, 1, 0, 0, 0, 264, 263, 1, 0, 0, 0, 265, 39, 1, 0, 0, 0, 26, 47, 59, 70, 78, 80, 88, 94, 104, 111, 117, 122, 134, 141, 149, 159, 165, 173, 182, 191, 200, 211, 219, 231, 238, 245, 264]
\ No newline at end of file
+[4, 1, 43, 276, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 3, 1, 48, 8, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 58, 8, 2, 10, 2, 12, 2, 61, 9, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 71, 8, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 79, 8, 2, 10, 2, 12, 2, 82, 9, 2, 1, 3, 1, 3, 1, 3, 5, 3, 87, 8, 3, 10, 3, 12, 3, 90, 9, 3, 1, 4, 1, 4, 1, 4, 3, 4, 95, 8, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 3, 6, 105, 8, 6, 1, 7, 1, 7, 1, 7, 5, 7, 110, 8, 7, 10, 7, 12, 7, 113, 9, 7, 1, 7, 1, 7, 1, 8, 3, 8, 118, 8, 8, 1, 8, 5, 8, 121, 8, 8, 10, 8, 12, 8, 124, 9, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 3, 10, 135, 8, 10, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 3, 12, 143, 8, 12, 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0, 0, 96, 97, 5, 22, 0, 0, 97, 9, 1, 0, 0, 0, 98, 99, 5, 28, 0, 0, 99, 100, 3, 4, 2, 0, 100, 11, 1, 0, 0, 0, 101, 102, 5, 36, 0, 0, 102, 104, 5, 43, 0, 0, 103, 105, 3, 10, 5, 0, 104, 103, 1, 0, 0, 0, 104, 105, 1, 0, 0, 0, 105, 13, 1, 0, 0, 0, 106, 107, 5, 5, 0, 0, 107, 111, 5, 25, 0, 0, 108, 110, 3, 12, 6, 0, 109, 108, 1, 0, 0, 0, 110, 113, 1, 0, 0, 0, 111, 109, 1, 0, 0, 0, 111, 112, 1, 0, 0, 0, 112, 114, 1, 0, 0, 0, 113, 111, 1, 0, 0, 0, 114, 115, 5, 26, 0, 0, 115, 15, 1, 0, 0, 0, 116, 118, 3, 14, 7, 0, 117, 116, 1, 0, 0, 0, 117, 118, 1, 0, 0, 0, 118, 122, 1, 0, 0, 0, 119, 121, 3, 38, 19, 0, 120, 119, 1, 0, 0, 0, 121, 124, 1, 0, 0, 0, 122, 120, 1, 0, 0, 0, 122, 123, 1, 0, 0, 0, 123, 125, 1, 0, 0, 0, 124, 122, 1, 0, 0, 0, 125, 126, 5, 0, 0, 1, 126, 17, 1, 0, 0, 0, 127, 128, 5, 23, 0, 0, 128, 129, 3, 4, 2, 0, 129, 130, 5, 29, 0, 0, 130, 131, 5, 24, 0, 0, 131, 19, 1, 0, 0, 0, 132, 135, 3, 4, 2, 0, 133, 135, 5, 13, 0, 0, 134, 132, 1, 0, 0, 0, 134, 133, 1, 0, 0, 0, 135, 21, 1, 0, 0, 0, 136, 137, 5, 33, 0, 0, 137, 138, 3, 4, 2, 0, 138, 23, 1, 0, 0, 0, 139, 140, 6, 12, -1, 0, 140, 142, 3, 4, 2, 0, 141, 143, 3, 22, 11, 0, 142, 141, 1, 0, 0, 0, 142, 143, 1, 0, 0, 0, 143, 144, 1, 0, 0, 0, 144, 145, 5, 14, 0, 0, 145, 146, 5, 15, 0, 0, 146, 147, 5, 16, 0, 0, 147, 193, 1, 0, 0, 0, 148, 150, 3, 4, 2, 0, 149, 151, 3, 22, 11, 0, 150, 149, 1, 0, 0, 0, 150, 151, 1, 0, 0, 0, 151, 152, 1, 0, 0, 0, 152, 153, 5, 14, 0, 0, 153, 154, 5, 16, 0, 0, 154, 155, 5, 11, 0, 0, 155, 156, 5, 12, 0, 0, 156, 157, 3, 4, 2, 0, 157, 193, 1, 0, 0, 0, 158, 160, 3, 4, 2, 0, 159, 161, 3, 22, 11, 0, 160, 159, 1, 0, 0, 0, 160, 161, 1, 0, 0, 0, 161, 193, 1, 0, 0, 0, 162, 164, 5, 25, 0, 0, 163, 165, 3, 26, 13, 0, 164, 163, 1, 0, 0, 0, 165, 166, 1, 0, 0, 0, 166, 164, 1, 0, 0, 0, 166, 167, 1, 0, 0, 0, 167, 168, 1, 0, 0, 0, 168, 169, 5, 26, 0, 0, 169, 193, 1, 0, 0, 0, 170, 174, 5, 25, 0, 0, 171, 173, 3, 24, 12, 0, 172, 171, 1, 0, 0, 0, 173, 176, 1, 0, 0, 0, 174, 172, 1, 0, 0, 0, 174, 175, 1, 0, 0, 0, 175, 177, 1, 0, 0, 0, 176, 174, 1, 0, 0, 0, 177, 193, 5, 26, 0, 0, 178, 179, 5, 17, 0, 0, 179, 181, 5, 25, 0, 0, 180, 182, 3, 24, 12, 0, 181, 180, 1, 0, 0, 0, 182, 183, 1, 0, 0, 0, 183, 181, 1, 0, 0, 0, 183, 184, 1, 0, 0, 0, 184, 185, 1, 0, 0, 0, 185, 186, 5, 26, 0, 0, 186, 193, 1, 0, 0, 0, 187, 188, 5, 6, 0, 0, 188, 189, 3, 4, 2, 0, 189, 190, 5, 10, 0, 0, 190, 191, 3, 24, 12, 2, 191, 193, 1, 0, 0, 0, 192, 139, 1, 0, 0, 0, 192, 148, 1, 0, 0, 0, 192, 158, 1, 0, 0, 0, 192, 162, 1, 0, 0, 0, 192, 170, 1, 0, 0, 0, 192, 178, 1, 0, 0, 0, 192, 187, 1, 0, 0, 0, 193, 199, 1, 0, 0, 0, 194, 195, 10, 1, 0, 0, 195, 196, 5, 18, 0, 0, 196, 198, 3, 24, 12, 2, 197, 194, 1, 0, 0, 0, 198, 201, 1, 0, 0, 0, 199, 197, 1, 0, 0, 0, 199, 200, 1, 0, 0, 0, 200, 25, 1, 0, 0, 0, 201, 199, 1, 0, 0, 0, 202, 203, 3, 20, 10, 0, 203, 204, 5, 10, 0, 0, 204, 205, 3, 24, 12, 0, 205, 27, 1, 0, 0, 0, 206, 207, 5, 12, 0, 0, 207, 210, 3, 32, 16, 0, 208, 210, 5, 19, 0, 0, 209, 206, 1, 0, 0, 0, 209, 208, 1, 0, 0, 0, 210, 29, 1, 0, 0, 0, 211, 212, 5, 6, 0, 0, 212, 213, 3, 4, 2, 0, 213, 214, 3, 28, 14, 0, 214, 31, 1, 0, 0, 0, 215, 248, 3, 4, 2, 0, 216, 218, 5, 25, 0, 0, 217, 219, 3, 34, 17, 0, 218, 217, 1, 0, 0, 0, 219, 220, 1, 0, 0, 0, 220, 218, 1, 0, 0, 0, 220, 221, 1, 0, 0, 0, 221, 222, 1, 0, 0, 0, 222, 223, 5, 26, 0, 0, 223, 248, 1, 0, 0, 0, 224, 228, 5, 25, 0, 0, 225, 227, 3, 30, 15, 0, 226, 225, 1, 0, 0, 0, 227, 230, 1, 0, 0, 0, 228, 226, 1, 0, 0, 0, 228, 229, 1, 0, 0, 0, 229, 231, 1, 0, 0, 0, 230, 228, 1, 0, 0, 0, 231, 232, 5, 13, 0, 0, 232, 233, 3, 28, 14, 0, 233, 234, 5, 26, 0, 0, 234, 248, 1, 0, 0, 0, 235, 236, 5, 17, 0, 0, 236, 240, 5, 25, 0, 0, 237, 239, 3, 30, 15, 0, 238, 237, 1, 0, 0, 0, 239, 242, 1, 0, 0, 0, 240, 238, 1, 0, 0, 0, 240, 241, 1, 0, 0, 0, 241, 243, 1, 0, 0, 0, 242, 240, 1, 0, 0, 0, 243, 244, 5, 13, 0, 0, 244, 245, 3, 28, 14, 0, 245, 246, 5, 26, 0, 0, 246, 248, 1, 0, 0, 0, 247, 215, 1, 0, 0, 0, 247, 216, 1, 0, 0, 0, 247, 224, 1, 0, 0, 0, 247, 235, 1, 0, 0, 0, 248, 33, 1, 0, 0, 0, 249, 250, 3, 20, 10, 0, 250, 251, 3, 28, 14, 0, 251, 35, 1, 0, 0, 0, 252, 255, 3, 4, 2, 0, 253, 255, 3, 18, 9, 0, 254, 252, 1, 0, 0, 0, 254, 253, 1, 0, 0, 0, 255, 37, 1, 0, 0, 0, 256, 257, 5, 9, 0, 0, 257, 258, 3, 36, 18, 0, 258, 259, 5, 21, 0, 0, 259, 260, 5, 7, 0, 0, 260, 261, 5, 28, 0, 0, 261, 262, 3, 24, 12, 0, 262, 263, 5, 8, 0, 0, 263, 264, 5, 28, 0, 0, 264, 265, 3, 32, 16, 0, 265, 266, 5, 22, 0, 0, 266, 274, 1, 0, 0, 0, 267, 268, 5, 20, 0, 0, 268, 269, 3, 36, 18, 0, 269, 270, 5, 10, 0, 0, 270, 271, 3, 4, 2, 0, 271, 274, 1, 0, 0, 0, 272, 274, 3, 8, 4, 0, 273, 256, 1, 0, 0, 0, 273, 267, 1, 0, 0, 0, 273, 272, 1, 0, 0, 0, 274, 39, 1, 0, 0, 0, 27, 47, 59, 70, 78, 80, 88, 94, 104, 111, 117, 122, 134, 142, 150, 160, 166, 174, 183, 192, 199, 209, 220, 228, 240, 247, 254, 273]
\ No newline at end of file
diff --git a/internal/parser/antlrParser/Numscript.tokens b/internal/parser/antlrParser/Numscript.tokens
index 5fea9de1..562f5ca4 100644
--- a/internal/parser/antlrParser/Numscript.tokens
+++ b/internal/parser/antlrParser/Numscript.tokens
@@ -15,31 +15,32 @@ ALLOWING=14
 UNBOUNDED=15
 OVERDRAFT=16
 ONEOF=17
-KEPT=18
-SAVE=19
-LPARENS=20
-RPARENS=21
-LBRACKET=22
-RBRACKET=23
-LBRACE=24
-RBRACE=25
-COMMA=26
-EQ=27
-STAR=28
-PLUS=29
-MINUS=30
-DIV=31
-RESTRICT=32
-PERCENTAGE_PORTION_LITERAL=33
-STRING=34
-IDENTIFIER=35
-NUMBER=36
-ASSET=37
-ACCOUNT_START=38
-COLON=39
-ACCOUNT_TEXT=40
-VARIABLE_NAME_ACC=41
-VARIABLE_NAME=42
+THROUGH=18
+KEPT=19
+SAVE=20
+LPARENS=21
+RPARENS=22
+LBRACKET=23
+RBRACKET=24
+LBRACE=25
+RBRACE=26
+COMMA=27
+EQ=28
+STAR=29
+PLUS=30
+MINUS=31
+DIV=32
+RESTRICT=33
+PERCENTAGE_PORTION_LITERAL=34
+STRING=35
+IDENTIFIER=36
+NUMBER=37
+ASSET=38
+ACCOUNT_START=39
+COLON=40
+ACCOUNT_TEXT=41
+VARIABLE_NAME_ACC=42
+VARIABLE_NAME=43
 'vars'=5
 'max'=6
 'source'=7
@@ -53,20 +54,21 @@ VARIABLE_NAME=42
 'unbounded'=15
 'overdraft'=16
 'oneof'=17
-'kept'=18
-'save'=19
-'('=20
-')'=21
-'['=22
-']'=23
-'{'=24
-'}'=25
-','=26
-'='=27
-'*'=28
-'+'=29
-'-'=30
-'/'=31
-'\\'=32
-'@'=38
-':'=39
+'through'=18
+'kept'=19
+'save'=20
+'('=21
+')'=22
+'['=23
+']'=24
+'{'=25
+'}'=26
+','=27
+'='=28
+'*'=29
+'+'=30
+'-'=31
+'/'=32
+'\\'=33
+'@'=39
+':'=40
diff --git a/internal/parser/antlrParser/lexer.go b/internal/parser/antlrParser/lexer.go
index 9e7fd19a..b6793832 100644
--- a/internal/parser/antlrParser/lexer.go
+++ b/internal/parser/antlrParser/lexer.go
@@ -45,31 +45,31 @@ func lexerLexerInit() {
 	staticData.LiteralNames = []string{
 		"", "", "", "", "", "'vars'", "'max'", "'source'", "'destination'",
 		"'send'", "'from'", "'up'", "'to'", "'remaining'", "'allowing'", "'unbounded'",
-		"'overdraft'", "'oneof'", "'kept'", "'save'", "'('", "')'", "'['", "']'",
-		"'{'", "'}'", "','", "'='", "'*'", "'+'", "'-'", "'/'", "'\\'", "",
-		"", "", "", "", "'@'", "':'",
+		"'overdraft'", "'oneof'", "'through'", "'kept'", "'save'", "'('", "')'",
+		"'['", "']'", "'{'", "'}'", "','", "'='", "'*'", "'+'", "'-'", "'/'",
+		"'\\'", "", "", "", "", "", "'@'", "':'",
 	}
 	staticData.SymbolicNames = []string{
 		"", "WS", "NEWLINE", "MULTILINE_COMMENT", "LINE_COMMENT", "VARS", "MAX",
 		"SOURCE", "DESTINATION", "SEND", "FROM", "UP", "TO", "REMAINING", "ALLOWING",
-		"UNBOUNDED", "OVERDRAFT", "ONEOF", "KEPT", "SAVE", "LPARENS", "RPARENS",
-		"LBRACKET", "RBRACKET", "LBRACE", "RBRACE", "COMMA", "EQ", "STAR", "PLUS",
-		"MINUS", "DIV", "RESTRICT", "PERCENTAGE_PORTION_LITERAL", "STRING",
-		"IDENTIFIER", "NUMBER", "ASSET", "ACCOUNT_START", "COLON", "ACCOUNT_TEXT",
-		"VARIABLE_NAME_ACC", "VARIABLE_NAME",
+		"UNBOUNDED", "OVERDRAFT", "ONEOF", "THROUGH", "KEPT", "SAVE", "LPARENS",
+		"RPARENS", "LBRACKET", "RBRACKET", "LBRACE", "RBRACE", "COMMA", "EQ",
+		"STAR", "PLUS", "MINUS", "DIV", "RESTRICT", "PERCENTAGE_PORTION_LITERAL",
+		"STRING", "IDENTIFIER", "NUMBER", "ASSET", "ACCOUNT_START", "COLON",
+		"ACCOUNT_TEXT", "VARIABLE_NAME_ACC", "VARIABLE_NAME",
 	}
 	staticData.RuleNames = []string{
 		"WS", "NEWLINE", "MULTILINE_COMMENT", "LINE_COMMENT", "VARS", "MAX",
 		"SOURCE", "DESTINATION", "SEND", "FROM", "UP", "TO", "REMAINING", "ALLOWING",
-		"UNBOUNDED", "OVERDRAFT", "ONEOF", "KEPT", "SAVE", "LPARENS", "RPARENS",
-		"LBRACKET", "RBRACKET", "LBRACE", "RBRACE", "COMMA", "EQ", "STAR", "PLUS",
-		"MINUS", "DIV", "RESTRICT", "PERCENTAGE_PORTION_LITERAL", "STRING",
-		"IDENTIFIER", "NUMBER", "ASSET", "ACCOUNT_START", "COLON", "VARIABLE_NAME_FRAGMENT",
-		"ACCOUNT_TEXT", "VARIABLE_NAME_ACC", "VARIABLE_NAME",
+		"UNBOUNDED", "OVERDRAFT", "ONEOF", "THROUGH", "KEPT", "SAVE", "LPARENS",
+		"RPARENS", "LBRACKET", "RBRACKET", "LBRACE", "RBRACE", "COMMA", "EQ",
+		"STAR", "PLUS", "MINUS", "DIV", "RESTRICT", "PERCENTAGE_PORTION_LITERAL",
+		"STRING", "IDENTIFIER", "NUMBER", "ASSET", "ACCOUNT_START", "COLON",
+		"VARIABLE_NAME_FRAGMENT", "ACCOUNT_TEXT", "VARIABLE_NAME_ACC", "VARIABLE_NAME",
 	}
 	staticData.PredictionContextCache = antlr.NewPredictionContextCache()
 	staticData.serializedATN = []int32{
-		4, 0, 42, 357, 6, -1, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3,
+		4, 0, 43, 367, 6, -1, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3,
 		7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9,
 		7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7,
 		14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19,
@@ -77,159 +77,163 @@ func lexerLexerInit() {
 		25, 7, 25, 2, 26, 7, 26, 2, 27, 7, 27, 2, 28, 7, 28, 2, 29, 7, 29, 2, 30,
 		7, 30, 2, 31, 7, 31, 2, 32, 7, 32, 2, 33, 7, 33, 2, 34, 7, 34, 2, 35, 7,
 		35, 2, 36, 7, 36, 2, 37, 7, 37, 2, 38, 7, 38, 2, 39, 7, 39, 2, 40, 7, 40,
-		2, 41, 7, 41, 2, 42, 7, 42, 1, 0, 4, 0, 90, 8, 0, 11, 0, 12, 0, 91, 1,
-		0, 1, 0, 1, 1, 4, 1, 97, 8, 1, 11, 1, 12, 1, 98, 1, 2, 1, 2, 1, 2, 1, 2,
-		1, 2, 5, 2, 106, 8, 2, 10, 2, 12, 2, 109, 9, 2, 1, 2, 1, 2, 1, 2, 1, 2,
-		1, 2, 1, 3, 1, 3, 1, 3, 1, 3, 5, 3, 120, 8, 3, 10, 3, 12, 3, 123, 9, 3,
-		1, 3, 1, 3, 1, 3, 1, 3, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5,
-		1, 5, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 7,
-		1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 8,
-		1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 11, 1, 11,
-		1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1,
-		12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14,
-		1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 15, 1,
-		15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16,
-		1, 16, 1, 16, 1, 16, 1, 16, 1, 17, 1, 17, 1, 17, 1, 17, 1, 17, 1, 18, 1,
-		18, 1, 18, 1, 18, 1, 18, 1, 19, 1, 19, 1, 20, 1, 20, 1, 21, 1, 21, 1, 22,
-		1, 22, 1, 23, 1, 23, 1, 24, 1, 24, 1, 25, 1, 25, 1, 26, 1, 26, 1, 27, 1,
-		27, 1, 28, 1, 28, 1, 29, 1, 29, 1, 30, 1, 30, 1, 31, 1, 31, 1, 32, 4, 32,
-		255, 8, 32, 11, 32, 12, 32, 256, 1, 32, 1, 32, 4, 32, 261, 8, 32, 11, 32,
-		12, 32, 262, 3, 32, 265, 8, 32, 1, 32, 1, 32, 1, 33, 1, 33, 1, 33, 1, 33,
-		5, 33, 273, 8, 33, 10, 33, 12, 33, 276, 9, 33, 1, 33, 1, 33, 1, 34, 4,
-		34, 281, 8, 34, 11, 34, 12, 34, 282, 1, 34, 5, 34, 286, 8, 34, 10, 34,
-		12, 34, 289, 9, 34, 1, 35, 3, 35, 292, 8, 35, 1, 35, 4, 35, 295, 8, 35,
-		11, 35, 12, 35, 296, 1, 35, 1, 35, 4, 35, 301, 8, 35, 11, 35, 12, 35, 302,
-		5, 35, 305, 8, 35, 10, 35, 12, 35, 308, 9, 35, 1, 36, 1, 36, 5, 36, 312,
-		8, 36, 10, 36, 12, 36, 315, 9, 36, 1, 36, 1, 36, 4, 36, 319, 8, 36, 11,
-		36, 12, 36, 320, 3, 36, 323, 8, 36, 1, 37, 1, 37, 1, 37, 1, 37, 1, 38,
-		1, 38, 1, 38, 1, 38, 1, 39, 1, 39, 4, 39, 335, 8, 39, 11, 39, 12, 39, 336,
-		1, 39, 5, 39, 340, 8, 39, 10, 39, 12, 39, 343, 9, 39, 1, 40, 4, 40, 346,
-		8, 40, 11, 40, 12, 40, 347, 1, 40, 1, 40, 1, 41, 1, 41, 1, 41, 1, 41, 1,
-		42, 1, 42, 2, 107, 121, 0, 43, 2, 1, 4, 2, 6, 3, 8, 4, 10, 5, 12, 6, 14,
+		2, 41, 7, 41, 2, 42, 7, 42, 2, 43, 7, 43, 1, 0, 4, 0, 92, 8, 0, 11, 0,
+		12, 0, 93, 1, 0, 1, 0, 1, 1, 4, 1, 99, 8, 1, 11, 1, 12, 1, 100, 1, 2, 1,
+		2, 1, 2, 1, 2, 1, 2, 5, 2, 108, 8, 2, 10, 2, 12, 2, 111, 9, 2, 1, 2, 1,
+		2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 3, 1, 3, 1, 3, 5, 3, 122, 8, 3, 10, 3, 12,
+		3, 125, 9, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1,
+		5, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 7, 1,
+		7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 8, 1,
+		8, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10,
+		1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1,
+		12, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13,
+		1, 13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1,
+		14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15,
+		1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 17, 1, 17, 1, 17, 1, 17, 1,
+		17, 1, 17, 1, 17, 1, 17, 1, 18, 1, 18, 1, 18, 1, 18, 1, 18, 1, 19, 1, 19,
+		1, 19, 1, 19, 1, 19, 1, 20, 1, 20, 1, 21, 1, 21, 1, 22, 1, 22, 1, 23, 1,
+		23, 1, 24, 1, 24, 1, 25, 1, 25, 1, 26, 1, 26, 1, 27, 1, 27, 1, 28, 1, 28,
+		1, 29, 1, 29, 1, 30, 1, 30, 1, 31, 1, 31, 1, 32, 1, 32, 1, 33, 4, 33, 265,
+		8, 33, 11, 33, 12, 33, 266, 1, 33, 1, 33, 4, 33, 271, 8, 33, 11, 33, 12,
+		33, 272, 3, 33, 275, 8, 33, 1, 33, 1, 33, 1, 34, 1, 34, 1, 34, 1, 34, 5,
+		34, 283, 8, 34, 10, 34, 12, 34, 286, 9, 34, 1, 34, 1, 34, 1, 35, 4, 35,
+		291, 8, 35, 11, 35, 12, 35, 292, 1, 35, 5, 35, 296, 8, 35, 10, 35, 12,
+		35, 299, 9, 35, 1, 36, 3, 36, 302, 8, 36, 1, 36, 4, 36, 305, 8, 36, 11,
+		36, 12, 36, 306, 1, 36, 1, 36, 4, 36, 311, 8, 36, 11, 36, 12, 36, 312,
+		5, 36, 315, 8, 36, 10, 36, 12, 36, 318, 9, 36, 1, 37, 1, 37, 5, 37, 322,
+		8, 37, 10, 37, 12, 37, 325, 9, 37, 1, 37, 1, 37, 4, 37, 329, 8, 37, 11,
+		37, 12, 37, 330, 3, 37, 333, 8, 37, 1, 38, 1, 38, 1, 38, 1, 38, 1, 39,
+		1, 39, 1, 39, 1, 39, 1, 40, 1, 40, 4, 40, 345, 8, 40, 11, 40, 12, 40, 346,
+		1, 40, 5, 40, 350, 8, 40, 10, 40, 12, 40, 353, 9, 40, 1, 41, 4, 41, 356,
+		8, 41, 11, 41, 12, 41, 357, 1, 41, 1, 41, 1, 42, 1, 42, 1, 42, 1, 42, 1,
+		43, 1, 43, 2, 109, 123, 0, 44, 2, 1, 4, 2, 6, 3, 8, 4, 10, 5, 12, 6, 14,
 		7, 16, 8, 18, 9, 20, 10, 22, 11, 24, 12, 26, 13, 28, 14, 30, 15, 32, 16,
 		34, 17, 36, 18, 38, 19, 40, 20, 42, 21, 44, 22, 46, 23, 48, 24, 50, 25,
 		52, 26, 54, 27, 56, 28, 58, 29, 60, 30, 62, 31, 64, 32, 66, 33, 68, 34,
-		70, 35, 72, 36, 74, 37, 76, 38, 78, 39, 80, 0, 82, 40, 84, 41, 86, 42,
-		2, 0, 1, 10, 3, 0, 9, 10, 13, 13, 32, 32, 2, 0, 10, 10, 13, 13, 1, 0, 48,
-		57, 3, 0, 10, 10, 13, 13, 34, 34, 1, 0, 97, 122, 2, 0, 95, 95, 97, 122,
-		1, 0, 65, 90, 2, 0, 48, 57, 65, 90, 3, 0, 48, 57, 95, 95, 97, 122, 5, 0,
-		45, 45, 48, 57, 65, 90, 95, 95, 97, 122, 376, 0, 2, 1, 0, 0, 0, 0, 4, 1,
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+		195, 196, 5, 98, 0, 0, 196, 197, 5, 111, 0, 0, 197, 198, 5, 117, 0, 0,
+		198, 199, 5, 110, 0, 0, 199, 200, 5, 100, 0, 0, 200, 201, 5, 101, 0, 0,
+		201, 202, 5, 100, 0, 0, 202, 31, 1, 0, 0, 0, 203, 204, 5, 111, 0, 0, 204,
+		205, 5, 118, 0, 0, 205, 206, 5, 101, 0, 0, 206, 207, 5, 114, 0, 0, 207,
+		208, 5, 100, 0, 0, 208, 209, 5, 114, 0, 0, 209, 210, 5, 97, 0, 0, 210,
+		211, 5, 102, 0, 0, 211, 212, 5, 116, 0, 0, 212, 33, 1, 0, 0, 0, 213, 214,
+		5, 111, 0, 0, 214, 215, 5, 110, 0, 0, 215, 216, 5, 101, 0, 0, 216, 217,
+		5, 111, 0, 0, 217, 218, 5, 102, 0, 0, 218, 35, 1, 0, 0, 0, 219, 220, 5,
+		116, 0, 0, 220, 221, 5, 104, 0, 0, 221, 222, 5, 114, 0, 0, 222, 223, 5,
+		111, 0, 0, 223, 224, 5, 117, 0, 0, 224, 225, 5, 103, 0, 0, 225, 226, 5,
+		104, 0, 0, 226, 37, 1, 0, 0, 0, 227, 228, 5, 107, 0, 0, 228, 229, 5, 101,
+		0, 0, 229, 230, 5, 112, 0, 0, 230, 231, 5, 116, 0, 0, 231, 39, 1, 0, 0,
+		0, 232, 233, 5, 115, 0, 0, 233, 234, 5, 97, 0, 0, 234, 235, 5, 118, 0,
+		0, 235, 236, 5, 101, 0, 0, 236, 41, 1, 0, 0, 0, 237, 238, 5, 40, 0, 0,
+		238, 43, 1, 0, 0, 0, 239, 240, 5, 41, 0, 0, 240, 45, 1, 0, 0, 0, 241, 242,
+		5, 91, 0, 0, 242, 47, 1, 0, 0, 0, 243, 244, 5, 93, 0, 0, 244, 49, 1, 0,
+		0, 0, 245, 246, 5, 123, 0, 0, 246, 51, 1, 0, 0, 0, 247, 248, 5, 125, 0,
+		0, 248, 53, 1, 0, 0, 0, 249, 250, 5, 44, 0, 0, 250, 55, 1, 0, 0, 0, 251,
+		252, 5, 61, 0, 0, 252, 57, 1, 0, 0, 0, 253, 254, 5, 42, 0, 0, 254, 59,
+		1, 0, 0, 0, 255, 256, 5, 43, 0, 0, 256, 61, 1, 0, 0, 0, 257, 258, 5, 45,
+		0, 0, 258, 63, 1, 0, 0, 0, 259, 260, 5, 47, 0, 0, 260, 65, 1, 0, 0, 0,
+		261, 262, 5, 92, 0, 0, 262, 67, 1, 0, 0, 0, 263, 265, 7, 2, 0, 0, 264,
+		263, 1, 0, 0, 0, 265, 266, 1, 0, 0, 0, 266, 264, 1, 0, 0, 0, 266, 267,
+		1, 0, 0, 0, 267, 274, 1, 0, 0, 0, 268, 270, 5, 46, 0, 0, 269, 271, 7, 2,
+		0, 0, 270, 269, 1, 0, 0, 0, 271, 272, 1, 0, 0, 0, 272, 270, 1, 0, 0, 0,
+		272, 273, 1, 0, 0, 0, 273, 275, 1, 0, 0, 0, 274, 268, 1, 0, 0, 0, 274,
+		275, 1, 0, 0, 0, 275, 276, 1, 0, 0, 0, 276, 277, 5, 37, 0, 0, 277, 69,
+		1, 0, 0, 0, 278, 284, 5, 34, 0, 0, 279, 280, 5, 92, 0, 0, 280, 283, 5,
+		34, 0, 0, 281, 283, 8, 3, 0, 0, 282, 279, 1, 0, 0, 0, 282, 281, 1, 0, 0,
+		0, 283, 286, 1, 0, 0, 0, 284, 282, 1, 0, 0, 0, 284, 285, 1, 0, 0, 0, 285,
+		287, 1, 0, 0, 0, 286, 284, 1, 0, 0, 0, 287, 288, 5, 34, 0, 0, 288, 71,
+		1, 0, 0, 0, 289, 291, 7, 4, 0, 0, 290, 289, 1, 0, 0, 0, 291, 292, 1, 0,
+		0, 0, 292, 290, 1, 0, 0, 0, 292, 293, 1, 0, 0, 0, 293, 297, 1, 0, 0, 0,
+		294, 296, 7, 5, 0, 0, 295, 294, 1, 0, 0, 0, 296, 299, 1, 0, 0, 0, 297,
+		295, 1, 0, 0, 0, 297, 298, 1, 0, 0, 0, 298, 73, 1, 0, 0, 0, 299, 297, 1,
+		0, 0, 0, 300, 302, 3, 62, 30, 0, 301, 300, 1, 0, 0, 0, 301, 302, 1, 0,
+		0, 0, 302, 304, 1, 0, 0, 0, 303, 305, 7, 2, 0, 0, 304, 303, 1, 0, 0, 0,
+		305, 306, 1, 0, 0, 0, 306, 304, 1, 0, 0, 0, 306, 307, 1, 0, 0, 0, 307,
+		316, 1, 0, 0, 0, 308, 310, 5, 95, 0, 0, 309, 311, 7, 2, 0, 0, 310, 309,
+		1, 0, 0, 0, 311, 312, 1, 0, 0, 0, 312, 310, 1, 0, 0, 0, 312, 313, 1, 0,
+		0, 0, 313, 315, 1, 0, 0, 0, 314, 308, 1, 0, 0, 0, 315, 318, 1, 0, 0, 0,
+		316, 314, 1, 0, 0, 0, 316, 317, 1, 0, 0, 0, 317, 75, 1, 0, 0, 0, 318, 316,
+		1, 0, 0, 0, 319, 323, 7, 6, 0, 0, 320, 322, 7, 7, 0, 0, 321, 320, 1, 0,
+		0, 0, 322, 325, 1, 0, 0, 0, 323, 321, 1, 0, 0, 0, 323, 324, 1, 0, 0, 0,
+		324, 332, 1, 0, 0, 0, 325, 323, 1, 0, 0, 0, 326, 328, 5, 47, 0, 0, 327,
+		329, 7, 2, 0, 0, 328, 327, 1, 0, 0, 0, 329, 330, 1, 0, 0, 0, 330, 328,
+		1, 0, 0, 0, 330, 331, 1, 0, 0, 0, 331, 333, 1, 0, 0, 0, 332, 326, 1, 0,
+		0, 0, 332, 333, 1, 0, 0, 0, 333, 77, 1, 0, 0, 0, 334, 335, 5, 64, 0, 0,
+		335, 336, 1, 0, 0, 0, 336, 337, 6, 38, 2, 0, 337, 79, 1, 0, 0, 0, 338,
+		339, 5, 58, 0, 0, 339, 340, 1, 0, 0, 0, 340, 341, 6, 39, 2, 0, 341, 81,
+		1, 0, 0, 0, 342, 344, 5, 36, 0, 0, 343, 345, 7, 5, 0, 0, 344, 343, 1, 0,
+		0, 0, 345, 346, 1, 0, 0, 0, 346, 344, 1, 0, 0, 0, 346, 347, 1, 0, 0, 0,
+		347, 351, 1, 0, 0, 0, 348, 350, 7, 8, 0, 0, 349, 348, 1, 0, 0, 0, 350,
+		353, 1, 0, 0, 0, 351, 349, 1, 0, 0, 0, 351, 352, 1, 0, 0, 0, 352, 83, 1,
+		0, 0, 0, 353, 351, 1, 0, 0, 0, 354, 356, 7, 9, 0, 0, 355, 354, 1, 0, 0,
+		0, 356, 357, 1, 0, 0, 0, 357, 355, 1, 0, 0, 0, 357, 358, 1, 0, 0, 0, 358,
+		359, 1, 0, 0, 0, 359, 360, 6, 41, 3, 0, 360, 85, 1, 0, 0, 0, 361, 362,
+		3, 82, 40, 0, 362, 363, 1, 0, 0, 0, 363, 364, 6, 42, 3, 0, 364, 87, 1,
+		0, 0, 0, 365, 366, 3, 82, 40, 0, 366, 89, 1, 0, 0, 0, 24, 0, 1, 93, 100,
+		107, 109, 123, 266, 272, 274, 282, 284, 292, 297, 301, 306, 312, 316, 323,
+		330, 332, 346, 351, 357, 4, 6, 0, 0, 0, 1, 0, 5, 1, 0, 4, 0, 0,
 	}
 	deserializer := antlr.NewATNDeserializer(nil)
 	staticData.atn = deserializer.Deserialize(staticData.serializedATN)
@@ -287,31 +291,32 @@ const (
 	LexerUNBOUNDED                  = 15
 	LexerOVERDRAFT                  = 16
 	LexerONEOF                      = 17
-	LexerKEPT                       = 18
-	LexerSAVE                       = 19
-	LexerLPARENS                    = 20
-	LexerRPARENS                    = 21
-	LexerLBRACKET                   = 22
-	LexerRBRACKET                   = 23
-	LexerLBRACE                     = 24
-	LexerRBRACE                     = 25
-	LexerCOMMA                      = 26
-	LexerEQ                         = 27
-	LexerSTAR                       = 28
-	LexerPLUS                       = 29
-	LexerMINUS                      = 30
-	LexerDIV                        = 31
-	LexerRESTRICT                   = 32
-	LexerPERCENTAGE_PORTION_LITERAL = 33
-	LexerSTRING                     = 34
-	LexerIDENTIFIER                 = 35
-	LexerNUMBER                     = 36
-	LexerASSET                      = 37
-	LexerACCOUNT_START              = 38
-	LexerCOLON                      = 39
-	LexerACCOUNT_TEXT               = 40
-	LexerVARIABLE_NAME_ACC          = 41
-	LexerVARIABLE_NAME              = 42
+	LexerTHROUGH                    = 18
+	LexerKEPT                       = 19
+	LexerSAVE                       = 20
+	LexerLPARENS                    = 21
+	LexerRPARENS                    = 22
+	LexerLBRACKET                   = 23
+	LexerRBRACKET                   = 24
+	LexerLBRACE                     = 25
+	LexerRBRACE                     = 26
+	LexerCOMMA                      = 27
+	LexerEQ                         = 28
+	LexerSTAR                       = 29
+	LexerPLUS                       = 30
+	LexerMINUS                      = 31
+	LexerDIV                        = 32
+	LexerRESTRICT                   = 33
+	LexerPERCENTAGE_PORTION_LITERAL = 34
+	LexerSTRING                     = 35
+	LexerIDENTIFIER                 = 36
+	LexerNUMBER                     = 37
+	LexerASSET                      = 38
+	LexerACCOUNT_START              = 39
+	LexerCOLON                      = 40
+	LexerACCOUNT_TEXT               = 41
+	LexerVARIABLE_NAME_ACC          = 42
+	LexerVARIABLE_NAME              = 43
 )
 
 // LexerACCOUNT_MODE is the Lexer mode.
diff --git a/internal/parser/antlrParser/numscript_base_listener.go b/internal/parser/antlrParser/numscript_base_listener.go
index 5c4e1f6b..cf43a027 100644
--- a/internal/parser/antlrParser/numscript_base_listener.go
+++ b/internal/parser/antlrParser/numscript_base_listener.go
@@ -158,14 +158,6 @@ func (s *BaseNumscriptListener) EnterColorConstraint(ctx *ColorConstraintContext
 // ExitColorConstraint is called when production colorConstraint is exited.
 func (s *BaseNumscriptListener) ExitColorConstraint(ctx *ColorConstraintContext) {}
 
-// EnterSrcAccountUnboundedOverdraft is called when production srcAccountUnboundedOverdraft is entered.
-func (s *BaseNumscriptListener) EnterSrcAccountUnboundedOverdraft(ctx *SrcAccountUnboundedOverdraftContext) {
-}
-
-// ExitSrcAccountUnboundedOverdraft is called when production srcAccountUnboundedOverdraft is exited.
-func (s *BaseNumscriptListener) ExitSrcAccountUnboundedOverdraft(ctx *SrcAccountUnboundedOverdraftContext) {
-}
-
 // EnterSrcAccountBoundedOverdraft is called when production srcAccountBoundedOverdraft is entered.
 func (s *BaseNumscriptListener) EnterSrcAccountBoundedOverdraft(ctx *SrcAccountBoundedOverdraftContext) {
 }
@@ -174,11 +166,25 @@ func (s *BaseNumscriptListener) EnterSrcAccountBoundedOverdraft(ctx *SrcAccountB
 func (s *BaseNumscriptListener) ExitSrcAccountBoundedOverdraft(ctx *SrcAccountBoundedOverdraftContext) {
 }
 
-// EnterSrcAccount is called when production srcAccount is entered.
-func (s *BaseNumscriptListener) EnterSrcAccount(ctx *SrcAccountContext) {}
+// EnterSrcOneof is called when production srcOneof is entered.
+func (s *BaseNumscriptListener) EnterSrcOneof(ctx *SrcOneofContext) {}
 
-// ExitSrcAccount is called when production srcAccount is exited.
-func (s *BaseNumscriptListener) ExitSrcAccount(ctx *SrcAccountContext) {}
+// ExitSrcOneof is called when production srcOneof is exited.
+func (s *BaseNumscriptListener) ExitSrcOneof(ctx *SrcOneofContext) {}
+
+// EnterSrcAccountUnboundedOverdraft is called when production srcAccountUnboundedOverdraft is entered.
+func (s *BaseNumscriptListener) EnterSrcAccountUnboundedOverdraft(ctx *SrcAccountUnboundedOverdraftContext) {
+}
+
+// ExitSrcAccountUnboundedOverdraft is called when production srcAccountUnboundedOverdraft is exited.
+func (s *BaseNumscriptListener) ExitSrcAccountUnboundedOverdraft(ctx *SrcAccountUnboundedOverdraftContext) {
+}
+
+// EnterSrcThrough is called when production srcThrough is entered.
+func (s *BaseNumscriptListener) EnterSrcThrough(ctx *SrcThroughContext) {}
+
+// ExitSrcThrough is called when production srcThrough is exited.
+func (s *BaseNumscriptListener) ExitSrcThrough(ctx *SrcThroughContext) {}
 
 // EnterSrcAllotment is called when production srcAllotment is entered.
 func (s *BaseNumscriptListener) EnterSrcAllotment(ctx *SrcAllotmentContext) {}
@@ -192,18 +198,18 @@ func (s *BaseNumscriptListener) EnterSrcInorder(ctx *SrcInorderContext) {}
 // ExitSrcInorder is called when production srcInorder is exited.
 func (s *BaseNumscriptListener) ExitSrcInorder(ctx *SrcInorderContext) {}
 
-// EnterSrcOneof is called when production srcOneof is entered.
-func (s *BaseNumscriptListener) EnterSrcOneof(ctx *SrcOneofContext) {}
-
-// ExitSrcOneof is called when production srcOneof is exited.
-func (s *BaseNumscriptListener) ExitSrcOneof(ctx *SrcOneofContext) {}
-
 // EnterSrcCapped is called when production srcCapped is entered.
 func (s *BaseNumscriptListener) EnterSrcCapped(ctx *SrcCappedContext) {}
 
 // ExitSrcCapped is called when production srcCapped is exited.
 func (s *BaseNumscriptListener) ExitSrcCapped(ctx *SrcCappedContext) {}
 
+// EnterSrcAccount is called when production srcAccount is entered.
+func (s *BaseNumscriptListener) EnterSrcAccount(ctx *SrcAccountContext) {}
+
+// ExitSrcAccount is called when production srcAccount is exited.
+func (s *BaseNumscriptListener) ExitSrcAccount(ctx *SrcAccountContext) {}
+
 // EnterAllotmentClauseSrc is called when production allotmentClauseSrc is entered.
 func (s *BaseNumscriptListener) EnterAllotmentClauseSrc(ctx *AllotmentClauseSrcContext) {}
 
diff --git a/internal/parser/antlrParser/numscript_listener.go b/internal/parser/antlrParser/numscript_listener.go
index 6dbcc8a0..30251ebf 100644
--- a/internal/parser/antlrParser/numscript_listener.go
+++ b/internal/parser/antlrParser/numscript_listener.go
@@ -76,14 +76,17 @@ type NumscriptListener interface {
 	// EnterColorConstraint is called when entering the colorConstraint production.
 	EnterColorConstraint(c *ColorConstraintContext)
 
-	// EnterSrcAccountUnboundedOverdraft is called when entering the srcAccountUnboundedOverdraft production.
-	EnterSrcAccountUnboundedOverdraft(c *SrcAccountUnboundedOverdraftContext)
-
 	// EnterSrcAccountBoundedOverdraft is called when entering the srcAccountBoundedOverdraft production.
 	EnterSrcAccountBoundedOverdraft(c *SrcAccountBoundedOverdraftContext)
 
-	// EnterSrcAccount is called when entering the srcAccount production.
-	EnterSrcAccount(c *SrcAccountContext)
+	// EnterSrcOneof is called when entering the srcOneof production.
+	EnterSrcOneof(c *SrcOneofContext)
+
+	// EnterSrcAccountUnboundedOverdraft is called when entering the srcAccountUnboundedOverdraft production.
+	EnterSrcAccountUnboundedOverdraft(c *SrcAccountUnboundedOverdraftContext)
+
+	// EnterSrcThrough is called when entering the srcThrough production.
+	EnterSrcThrough(c *SrcThroughContext)
 
 	// EnterSrcAllotment is called when entering the srcAllotment production.
 	EnterSrcAllotment(c *SrcAllotmentContext)
@@ -91,12 +94,12 @@ type NumscriptListener interface {
 	// EnterSrcInorder is called when entering the srcInorder production.
 	EnterSrcInorder(c *SrcInorderContext)
 
-	// EnterSrcOneof is called when entering the srcOneof production.
-	EnterSrcOneof(c *SrcOneofContext)
-
 	// EnterSrcCapped is called when entering the srcCapped production.
 	EnterSrcCapped(c *SrcCappedContext)
 
+	// EnterSrcAccount is called when entering the srcAccount production.
+	EnterSrcAccount(c *SrcAccountContext)
+
 	// EnterAllotmentClauseSrc is called when entering the allotmentClauseSrc production.
 	EnterAllotmentClauseSrc(c *AllotmentClauseSrcContext)
 
@@ -208,14 +211,17 @@ type NumscriptListener interface {
 	// ExitColorConstraint is called when exiting the colorConstraint production.
 	ExitColorConstraint(c *ColorConstraintContext)
 
-	// ExitSrcAccountUnboundedOverdraft is called when exiting the srcAccountUnboundedOverdraft production.
-	ExitSrcAccountUnboundedOverdraft(c *SrcAccountUnboundedOverdraftContext)
-
 	// ExitSrcAccountBoundedOverdraft is called when exiting the srcAccountBoundedOverdraft production.
 	ExitSrcAccountBoundedOverdraft(c *SrcAccountBoundedOverdraftContext)
 
-	// ExitSrcAccount is called when exiting the srcAccount production.
-	ExitSrcAccount(c *SrcAccountContext)
+	// ExitSrcOneof is called when exiting the srcOneof production.
+	ExitSrcOneof(c *SrcOneofContext)
+
+	// ExitSrcAccountUnboundedOverdraft is called when exiting the srcAccountUnboundedOverdraft production.
+	ExitSrcAccountUnboundedOverdraft(c *SrcAccountUnboundedOverdraftContext)
+
+	// ExitSrcThrough is called when exiting the srcThrough production.
+	ExitSrcThrough(c *SrcThroughContext)
 
 	// ExitSrcAllotment is called when exiting the srcAllotment production.
 	ExitSrcAllotment(c *SrcAllotmentContext)
@@ -223,12 +229,12 @@ type NumscriptListener interface {
 	// ExitSrcInorder is called when exiting the srcInorder production.
 	ExitSrcInorder(c *SrcInorderContext)
 
-	// ExitSrcOneof is called when exiting the srcOneof production.
-	ExitSrcOneof(c *SrcOneofContext)
-
 	// ExitSrcCapped is called when exiting the srcCapped production.
 	ExitSrcCapped(c *SrcCappedContext)
 
+	// ExitSrcAccount is called when exiting the srcAccount production.
+	ExitSrcAccount(c *SrcAccountContext)
+
 	// ExitAllotmentClauseSrc is called when exiting the allotmentClauseSrc production.
 	ExitAllotmentClauseSrc(c *AllotmentClauseSrcContext)
 
diff --git a/internal/parser/antlrParser/numscript_parser.go b/internal/parser/antlrParser/numscript_parser.go
index d26c0454..bf188cfd 100644
--- a/internal/parser/antlrParser/numscript_parser.go
+++ b/internal/parser/antlrParser/numscript_parser.go
@@ -34,18 +34,18 @@ func numscriptParserInit() {
 	staticData.LiteralNames = []string{
 		"", "", "", "", "", "'vars'", "'max'", "'source'", "'destination'",
 		"'send'", "'from'", "'up'", "'to'", "'remaining'", "'allowing'", "'unbounded'",
-		"'overdraft'", "'oneof'", "'kept'", "'save'", "'('", "')'", "'['", "']'",
-		"'{'", "'}'", "','", "'='", "'*'", "'+'", "'-'", "'/'", "'\\'", "",
-		"", "", "", "", "'@'", "':'",
+		"'overdraft'", "'oneof'", "'through'", "'kept'", "'save'", "'('", "')'",
+		"'['", "']'", "'{'", "'}'", "','", "'='", "'*'", "'+'", "'-'", "'/'",
+		"'\\'", "", "", "", "", "", "'@'", "':'",
 	}
 	staticData.SymbolicNames = []string{
 		"", "WS", "NEWLINE", "MULTILINE_COMMENT", "LINE_COMMENT", "VARS", "MAX",
 		"SOURCE", "DESTINATION", "SEND", "FROM", "UP", "TO", "REMAINING", "ALLOWING",
-		"UNBOUNDED", "OVERDRAFT", "ONEOF", "KEPT", "SAVE", "LPARENS", "RPARENS",
-		"LBRACKET", "RBRACKET", "LBRACE", "RBRACE", "COMMA", "EQ", "STAR", "PLUS",
-		"MINUS", "DIV", "RESTRICT", "PERCENTAGE_PORTION_LITERAL", "STRING",
-		"IDENTIFIER", "NUMBER", "ASSET", "ACCOUNT_START", "COLON", "ACCOUNT_TEXT",
-		"VARIABLE_NAME_ACC", "VARIABLE_NAME",
+		"UNBOUNDED", "OVERDRAFT", "ONEOF", "THROUGH", "KEPT", "SAVE", "LPARENS",
+		"RPARENS", "LBRACKET", "RBRACKET", "LBRACE", "RBRACE", "COMMA", "EQ",
+		"STAR", "PLUS", "MINUS", "DIV", "RESTRICT", "PERCENTAGE_PORTION_LITERAL",
+		"STRING", "IDENTIFIER", "NUMBER", "ASSET", "ACCOUNT_START", "COLON",
+		"ACCOUNT_TEXT", "VARIABLE_NAME_ACC", "VARIABLE_NAME",
 	}
 	staticData.RuleNames = []string{
 		"monetaryLit", "accountLiteralPart", "valueExpr", "functionCallArgs",
@@ -56,7 +56,7 @@ func numscriptParserInit() {
 	}
 	staticData.PredictionContextCache = antlr.NewPredictionContextCache()
 	staticData.serializedATN = []int32{
-		4, 1, 42, 267, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7,
+		4, 1, 43, 276, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7,
 		4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7,
 		10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15,
 		2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 1, 0, 1, 0, 1,
@@ -69,110 +69,115 @@ func numscriptParserInit() {
 		1, 7, 1, 7, 5, 7, 110, 8, 7, 10, 7, 12, 7, 113, 9, 7, 1, 7, 1, 7, 1, 8,
 		3, 8, 118, 8, 8, 1, 8, 5, 8, 121, 8, 8, 10, 8, 12, 8, 124, 9, 8, 1, 8,
 		1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 3, 10, 135, 8, 10, 1,
-		11, 1, 11, 1, 11, 1, 12, 1, 12, 3, 12, 142, 8, 12, 1, 12, 1, 12, 1, 12,
-		1, 12, 1, 12, 1, 12, 3, 12, 150, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1,
-		12, 1, 12, 1, 12, 1, 12, 3, 12, 160, 8, 12, 1, 12, 1, 12, 4, 12, 164, 8,
-		12, 11, 12, 12, 12, 165, 1, 12, 1, 12, 1, 12, 1, 12, 5, 12, 172, 8, 12,
-		10, 12, 12, 12, 175, 9, 12, 1, 12, 1, 12, 1, 12, 1, 12, 4, 12, 181, 8,
-		12, 11, 12, 12, 12, 182, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12,
-		3, 12, 192, 8, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 3,
-		14, 201, 8, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 4, 16,
-		210, 8, 16, 11, 16, 12, 16, 211, 1, 16, 1, 16, 1, 16, 1, 16, 5, 16, 218,
-		8, 16, 10, 16, 12, 16, 221, 9, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1,
-		16, 1, 16, 5, 16, 230, 8, 16, 10, 16, 12, 16, 233, 9, 16, 1, 16, 1, 16,
-		1, 16, 1, 16, 3, 16, 239, 8, 16, 1, 17, 1, 17, 1, 17, 1, 18, 1, 18, 3,
-		18, 246, 8, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19,
-		1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 3, 19, 265,
-		8, 19, 1, 19, 0, 1, 4, 20, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24,
-		26, 28, 30, 32, 34, 36, 38, 0, 2, 1, 0, 29, 30, 2, 0, 16, 16, 35, 35, 287,
-		0, 40, 1, 0, 0, 0, 2, 47, 1, 0, 0, 0, 4, 70, 1, 0, 0, 0, 6, 83, 1, 0, 0,
-		0, 8, 91, 1, 0, 0, 0, 10, 98, 1, 0, 0, 0, 12, 101, 1, 0, 0, 0, 14, 106,
-		1, 0, 0, 0, 16, 117, 1, 0, 0, 0, 18, 127, 1, 0, 0, 0, 20, 134, 1, 0, 0,
-		0, 22, 136, 1, 0, 0, 0, 24, 191, 1, 0, 0, 0, 26, 193, 1, 0, 0, 0, 28, 200,
-		1, 0, 0, 0, 30, 202, 1, 0, 0, 0, 32, 238, 1, 0, 0, 0, 34, 240, 1, 0, 0,
-		0, 36, 245, 1, 0, 0, 0, 38, 264, 1, 0, 0, 0, 40, 41, 5, 22, 0, 0, 41, 42,
-		3, 4, 2, 0, 42, 43, 3, 4, 2, 0, 43, 44, 5, 23, 0, 0, 44, 1, 1, 0, 0, 0,
-		45, 48, 5, 40, 0, 0, 46, 48, 5, 41, 0, 0, 47, 45, 1, 0, 0, 0, 47, 46, 1,
-		0, 0, 0, 48, 3, 1, 0, 0, 0, 49, 50, 6, 2, -1, 0, 50, 71, 5, 42, 0, 0, 51,
-		71, 5, 37, 0, 0, 52, 71, 5, 34, 0, 0, 53, 54, 5, 38, 0, 0, 54, 59, 3, 2,
-		1, 0, 55, 56, 5, 39, 0, 0, 56, 58, 3, 2, 1, 0, 57, 55, 1, 0, 0, 0, 58,
-		61, 1, 0, 0, 0, 59, 57, 1, 0, 0, 0, 59, 60, 1, 0, 0, 0, 60, 71, 1, 0, 0,
-		0, 61, 59, 1, 0, 0, 0, 62, 71, 5, 36, 0, 0, 63, 71, 5, 33, 0, 0, 64, 71,
-		3, 0, 0, 0, 65, 66, 5, 20, 0, 0, 66, 67, 3, 4, 2, 0, 67, 68, 5, 21, 0,
-		0, 68, 71, 1, 0, 0, 0, 69, 71, 3, 8, 4, 0, 70, 49, 1, 0, 0, 0, 70, 51,
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-		70, 63, 1, 0, 0, 0, 70, 64, 1, 0, 0, 0, 70, 65, 1, 0, 0, 0, 70, 69, 1,
-		0, 0, 0, 71, 80, 1, 0, 0, 0, 72, 73, 10, 4, 0, 0, 73, 74, 5, 31, 0, 0,
-		74, 79, 3, 4, 2, 5, 75, 76, 10, 3, 0, 0, 76, 77, 7, 0, 0, 0, 77, 79, 3,
-		4, 2, 4, 78, 72, 1, 0, 0, 0, 78, 75, 1, 0, 0, 0, 79, 82, 1, 0, 0, 0, 80,
-		78, 1, 0, 0, 0, 80, 81, 1, 0, 0, 0, 81, 5, 1, 0, 0, 0, 82, 80, 1, 0, 0,
-		0, 83, 88, 3, 4, 2, 0, 84, 85, 5, 26, 0, 0, 85, 87, 3, 4, 2, 0, 86, 84,
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-		89, 7, 1, 0, 0, 0, 90, 88, 1, 0, 0, 0, 91, 92, 7, 1, 0, 0, 92, 94, 5, 20,
-		0, 0, 93, 95, 3, 6, 3, 0, 94, 93, 1, 0, 0, 0, 94, 95, 1, 0, 0, 0, 95, 96,
-		1, 0, 0, 0, 96, 97, 5, 21, 0, 0, 97, 9, 1, 0, 0, 0, 98, 99, 5, 27, 0, 0,
-		99, 100, 3, 4, 2, 0, 100, 11, 1, 0, 0, 0, 101, 102, 5, 35, 0, 0, 102, 104,
-		5, 42, 0, 0, 103, 105, 3, 10, 5, 0, 104, 103, 1, 0, 0, 0, 104, 105, 1,
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-		109, 1, 0, 0, 0, 111, 112, 1, 0, 0, 0, 112, 114, 1, 0, 0, 0, 113, 111,
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-		0, 131, 19, 1, 0, 0, 0, 132, 135, 3, 4, 2, 0, 133, 135, 5, 13, 0, 0, 134,
-		132, 1, 0, 0, 0, 134, 133, 1, 0, 0, 0, 135, 21, 1, 0, 0, 0, 136, 137, 5,
-		32, 0, 0, 137, 138, 3, 4, 2, 0, 138, 23, 1, 0, 0, 0, 139, 141, 3, 4, 2,
-		0, 140, 142, 3, 22, 11, 0, 141, 140, 1, 0, 0, 0, 141, 142, 1, 0, 0, 0,
-		142, 143, 1, 0, 0, 0, 143, 144, 5, 14, 0, 0, 144, 145, 5, 15, 0, 0, 145,
-		146, 5, 16, 0, 0, 146, 192, 1, 0, 0, 0, 147, 149, 3, 4, 2, 0, 148, 150,
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-		157, 159, 3, 4, 2, 0, 158, 160, 3, 22, 11, 0, 159, 158, 1, 0, 0, 0, 159,
-		160, 1, 0, 0, 0, 160, 192, 1, 0, 0, 0, 161, 163, 5, 24, 0, 0, 162, 164,
-		3, 26, 13, 0, 163, 162, 1, 0, 0, 0, 164, 165, 1, 0, 0, 0, 165, 163, 1,
-		0, 0, 0, 165, 166, 1, 0, 0, 0, 166, 167, 1, 0, 0, 0, 167, 168, 5, 25, 0,
-		0, 168, 192, 1, 0, 0, 0, 169, 173, 5, 24, 0, 0, 170, 172, 3, 24, 12, 0,
-		171, 170, 1, 0, 0, 0, 172, 175, 1, 0, 0, 0, 173, 171, 1, 0, 0, 0, 173,
-		174, 1, 0, 0, 0, 174, 176, 1, 0, 0, 0, 175, 173, 1, 0, 0, 0, 176, 192,
-		5, 25, 0, 0, 177, 178, 5, 17, 0, 0, 178, 180, 5, 24, 0, 0, 179, 181, 3,
-		24, 12, 0, 180, 179, 1, 0, 0, 0, 181, 182, 1, 0, 0, 0, 182, 180, 1, 0,
-		0, 0, 182, 183, 1, 0, 0, 0, 183, 184, 1, 0, 0, 0, 184, 185, 5, 25, 0, 0,
-		185, 192, 1, 0, 0, 0, 186, 187, 5, 6, 0, 0, 187, 188, 3, 4, 2, 0, 188,
-		189, 5, 10, 0, 0, 189, 190, 3, 24, 12, 0, 190, 192, 1, 0, 0, 0, 191, 139,
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-		192, 25, 1, 0, 0, 0, 193, 194, 3, 20, 10, 0, 194, 195, 5, 10, 0, 0, 195,
-		196, 3, 24, 12, 0, 196, 27, 1, 0, 0, 0, 197, 198, 5, 12, 0, 0, 198, 201,
-		3, 32, 16, 0, 199, 201, 5, 18, 0, 0, 200, 197, 1, 0, 0, 0, 200, 199, 1,
-		0, 0, 0, 201, 29, 1, 0, 0, 0, 202, 203, 5, 6, 0, 0, 203, 204, 3, 4, 2,
-		0, 204, 205, 3, 28, 14, 0, 205, 31, 1, 0, 0, 0, 206, 239, 3, 4, 2, 0, 207,
-		209, 5, 24, 0, 0, 208, 210, 3, 34, 17, 0, 209, 208, 1, 0, 0, 0, 210, 211,
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-		0, 0, 213, 214, 5, 25, 0, 0, 214, 239, 1, 0, 0, 0, 215, 219, 5, 24, 0,
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-		219, 217, 1, 0, 0, 0, 219, 220, 1, 0, 0, 0, 220, 222, 1, 0, 0, 0, 221,
-		219, 1, 0, 0, 0, 222, 223, 5, 13, 0, 0, 223, 224, 3, 28, 14, 0, 224, 225,
-		5, 25, 0, 0, 225, 239, 1, 0, 0, 0, 226, 227, 5, 17, 0, 0, 227, 231, 5,
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-		0, 243, 246, 3, 4, 2, 0, 244, 246, 3, 18, 9, 0, 245, 243, 1, 0, 0, 0, 245,
-		244, 1, 0, 0, 0, 246, 37, 1, 0, 0, 0, 247, 248, 5, 9, 0, 0, 248, 249, 3,
-		36, 18, 0, 249, 250, 5, 20, 0, 0, 250, 251, 5, 7, 0, 0, 251, 252, 5, 27,
-		0, 0, 252, 253, 3, 24, 12, 0, 253, 254, 5, 8, 0, 0, 254, 255, 5, 27, 0,
-		0, 255, 256, 3, 32, 16, 0, 256, 257, 5, 21, 0, 0, 257, 265, 1, 0, 0, 0,
-		258, 259, 5, 19, 0, 0, 259, 260, 3, 36, 18, 0, 260, 261, 5, 10, 0, 0, 261,
-		262, 3, 4, 2, 0, 262, 265, 1, 0, 0, 0, 263, 265, 3, 8, 4, 0, 264, 247,
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-		0, 0, 26, 47, 59, 70, 78, 80, 88, 94, 104, 111, 117, 122, 134, 141, 149,
-		159, 165, 173, 182, 191, 200, 211, 219, 231, 238, 245, 264,
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+		1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 151, 8, 12, 1, 12, 1, 12, 1, 12, 1,
+		12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 161, 8, 12, 1, 12, 1, 12, 4, 12,
+		165, 8, 12, 11, 12, 12, 12, 166, 1, 12, 1, 12, 1, 12, 1, 12, 5, 12, 173,
+		8, 12, 10, 12, 12, 12, 176, 9, 12, 1, 12, 1, 12, 1, 12, 1, 12, 4, 12, 182,
+		8, 12, 11, 12, 12, 12, 183, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1,
+		12, 3, 12, 193, 8, 12, 1, 12, 1, 12, 1, 12, 5, 12, 198, 8, 12, 10, 12,
+		12, 12, 201, 9, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 3,
+		14, 210, 8, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 4, 16,
+		219, 8, 16, 11, 16, 12, 16, 220, 1, 16, 1, 16, 1, 16, 1, 16, 5, 16, 227,
+		8, 16, 10, 16, 12, 16, 230, 9, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1,
+		16, 1, 16, 5, 16, 239, 8, 16, 10, 16, 12, 16, 242, 9, 16, 1, 16, 1, 16,
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+		18, 255, 8, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19,
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+		8, 19, 1, 19, 0, 2, 4, 24, 20, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22,
+		24, 26, 28, 30, 32, 34, 36, 38, 0, 2, 1, 0, 30, 31, 2, 0, 16, 16, 36, 36,
+		297, 0, 40, 1, 0, 0, 0, 2, 47, 1, 0, 0, 0, 4, 70, 1, 0, 0, 0, 6, 83, 1,
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+		251, 35, 1, 0, 0, 0, 252, 255, 3, 4, 2, 0, 253, 255, 3, 18, 9, 0, 254,
+		252, 1, 0, 0, 0, 254, 253, 1, 0, 0, 0, 255, 37, 1, 0, 0, 0, 256, 257, 5,
+		9, 0, 0, 257, 258, 3, 36, 18, 0, 258, 259, 5, 21, 0, 0, 259, 260, 5, 7,
+		0, 0, 260, 261, 5, 28, 0, 0, 261, 262, 3, 24, 12, 0, 262, 263, 5, 8, 0,
+		0, 263, 264, 5, 28, 0, 0, 264, 265, 3, 32, 16, 0, 265, 266, 5, 22, 0, 0,
+		266, 274, 1, 0, 0, 0, 267, 268, 5, 20, 0, 0, 268, 269, 3, 36, 18, 0, 269,
+		270, 5, 10, 0, 0, 270, 271, 3, 4, 2, 0, 271, 274, 1, 0, 0, 0, 272, 274,
+		3, 8, 4, 0, 273, 256, 1, 0, 0, 0, 273, 267, 1, 0, 0, 0, 273, 272, 1, 0,
+		0, 0, 274, 39, 1, 0, 0, 0, 27, 47, 59, 70, 78, 80, 88, 94, 104, 111, 117,
+		122, 134, 142, 150, 160, 166, 174, 183, 192, 199, 209, 220, 228, 240, 247,
+		254, 273,
 	}
 	deserializer := antlr.NewATNDeserializer(nil)
 	staticData.atn = deserializer.Deserialize(staticData.serializedATN)
@@ -228,31 +233,32 @@ const (
 	NumscriptParserUNBOUNDED                  = 15
 	NumscriptParserOVERDRAFT                  = 16
 	NumscriptParserONEOF                      = 17
-	NumscriptParserKEPT                       = 18
-	NumscriptParserSAVE                       = 19
-	NumscriptParserLPARENS                    = 20
-	NumscriptParserRPARENS                    = 21
-	NumscriptParserLBRACKET                   = 22
-	NumscriptParserRBRACKET                   = 23
-	NumscriptParserLBRACE                     = 24
-	NumscriptParserRBRACE                     = 25
-	NumscriptParserCOMMA                      = 26
-	NumscriptParserEQ                         = 27
-	NumscriptParserSTAR                       = 28
-	NumscriptParserPLUS                       = 29
-	NumscriptParserMINUS                      = 30
-	NumscriptParserDIV                        = 31
-	NumscriptParserRESTRICT                   = 32
-	NumscriptParserPERCENTAGE_PORTION_LITERAL = 33
-	NumscriptParserSTRING                     = 34
-	NumscriptParserIDENTIFIER                 = 35
-	NumscriptParserNUMBER                     = 36
-	NumscriptParserASSET                      = 37
-	NumscriptParserACCOUNT_START              = 38
-	NumscriptParserCOLON                      = 39
-	NumscriptParserACCOUNT_TEXT               = 40
-	NumscriptParserVARIABLE_NAME_ACC          = 41
-	NumscriptParserVARIABLE_NAME              = 42
+	NumscriptParserTHROUGH                    = 18
+	NumscriptParserKEPT                       = 19
+	NumscriptParserSAVE                       = 20
+	NumscriptParserLPARENS                    = 21
+	NumscriptParserRPARENS                    = 22
+	NumscriptParserLBRACKET                   = 23
+	NumscriptParserRBRACKET                   = 24
+	NumscriptParserLBRACE                     = 25
+	NumscriptParserRBRACE                     = 26
+	NumscriptParserCOMMA                      = 27
+	NumscriptParserEQ                         = 28
+	NumscriptParserSTAR                       = 29
+	NumscriptParserPLUS                       = 30
+	NumscriptParserMINUS                      = 31
+	NumscriptParserDIV                        = 32
+	NumscriptParserRESTRICT                   = 33
+	NumscriptParserPERCENTAGE_PORTION_LITERAL = 34
+	NumscriptParserSTRING                     = 35
+	NumscriptParserIDENTIFIER                 = 36
+	NumscriptParserNUMBER                     = 37
+	NumscriptParserASSET                      = 38
+	NumscriptParserACCOUNT_START              = 39
+	NumscriptParserCOLON                      = 40
+	NumscriptParserACCOUNT_TEXT               = 41
+	NumscriptParserVARIABLE_NAME_ACC          = 42
+	NumscriptParserVARIABLE_NAME              = 43
 )
 
 // NumscriptParser rules.
@@ -1826,7 +1832,7 @@ func (p *NumscriptParser) FunctionCall() (localctx IFunctionCallContext) {
 	}
 	_la = p.GetTokenStream().LA(1)
 
-	if (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939217698816) != 0 {
+	if (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&9878435332096) != 0 {
 		{
 			p.SetState(93)
 			p.FunctionCallArgs()
@@ -2486,7 +2492,7 @@ func (p *NumscriptParser) Program() (localctx IProgramContext) {
 	}
 	_la = p.GetTokenStream().LA(1)
 
-	for (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&34360328704) != 0 {
+	for (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&68720591360) != 0 {
 		{
 			p.SetState(119)
 			p.Statement()
@@ -3308,6 +3314,91 @@ func (s *SrcAccountUnboundedOverdraftContext) ExitRule(listener antlr.ParseTreeL
 	}
 }
 
+type SrcThroughContext struct {
+	SourceContext
+	src   ISourceContext
+	proxy ISourceContext
+}
+
+func NewSrcThroughContext(parser antlr.Parser, ctx antlr.ParserRuleContext) *SrcThroughContext {
+	var p = new(SrcThroughContext)
+
+	InitEmptySourceContext(&p.SourceContext)
+	p.parser = parser
+	p.CopyAll(ctx.(*SourceContext))
+
+	return p
+}
+
+func (s *SrcThroughContext) GetSrc() ISourceContext { return s.src }
+
+func (s *SrcThroughContext) GetProxy() ISourceContext { return s.proxy }
+
+func (s *SrcThroughContext) SetSrc(v ISourceContext) { s.src = v }
+
+func (s *SrcThroughContext) SetProxy(v ISourceContext) { s.proxy = v }
+
+func (s *SrcThroughContext) GetRuleContext() antlr.RuleContext {
+	return s
+}
+
+func (s *SrcThroughContext) THROUGH() antlr.TerminalNode {
+	return s.GetToken(NumscriptParserTHROUGH, 0)
+}
+
+func (s *SrcThroughContext) AllSource() []ISourceContext {
+	children := s.GetChildren()
+	len := 0
+	for _, ctx := range children {
+		if _, ok := ctx.(ISourceContext); ok {
+			len++
+		}
+	}
+
+	tst := make([]ISourceContext, len)
+	i := 0
+	for _, ctx := range children {
+		if t, ok := ctx.(ISourceContext); ok {
+			tst[i] = t.(ISourceContext)
+			i++
+		}
+	}
+
+	return tst
+}
+
+func (s *SrcThroughContext) Source(i int) ISourceContext {
+	var t antlr.RuleContext
+	j := 0
+	for _, ctx := range s.GetChildren() {
+		if _, ok := ctx.(ISourceContext); ok {
+			if j == i {
+				t = ctx.(antlr.RuleContext)
+				break
+			}
+			j++
+		}
+	}
+
+	if t == nil {
+		return nil
+	}
+
+	return t.(ISourceContext)
+}
+
+func (s *SrcThroughContext) EnterRule(listener antlr.ParseTreeListener) {
+	if listenerT, ok := listener.(NumscriptListener); ok {
+		listenerT.EnterSrcThrough(s)
+	}
+}
+
+func (s *SrcThroughContext) ExitRule(listener antlr.ParseTreeListener) {
+	if listenerT, ok := listener.(NumscriptListener); ok {
+		listenerT.ExitSrcThrough(s)
+	}
+}
+
 type SrcAllotmentContext struct {
 	SourceContext
 }
@@ -3604,11 +3695,24 @@ func (s *SrcAccountContext) ExitRule(listener antlr.ParseTreeListener) {
 }
 
 func (p *NumscriptParser) Source() (localctx ISourceContext) {
-	localctx = NewSourceContext(p, p.GetParserRuleContext(), p.GetState())
-	p.EnterRule(localctx, 24, NumscriptParserRULE_source)
+	return p.source(0)
+}
+
+func (p *NumscriptParser) source(_p int) (localctx ISourceContext) {
+	var _parentctx antlr.ParserRuleContext = p.GetParserRuleContext()
+
+	_parentState := p.GetState()
+	localctx = NewSourceContext(p, p.GetParserRuleContext(), _parentState)
+	var _prevctx ISourceContext = localctx
+	var _ antlr.ParserRuleContext = _prevctx // TODO: To prevent unused variable warning.
+	_startState := 24
+	p.EnterRecursionRule(localctx, 24, NumscriptParserRULE_source, _p)
 	var _la int
 
-	p.SetState(191)
+	var _alt int
+
+	p.EnterOuterAlt(localctx, 1)
+	p.SetState(192)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -3617,15 +3721,17 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 	switch p.GetInterpreter().AdaptivePredict(p.BaseParser, p.GetTokenStream(), 18, p.GetParserRuleContext()) {
 	case 1:
 		localctx = NewSrcAccountUnboundedOverdraftContext(p, localctx)
-		p.EnterOuterAlt(localctx, 1)
+		p.SetParserRuleContext(localctx)
+		_prevctx = localctx
+
 		{
-			p.SetState(139)
+			p.SetState(140)
 
 			var _x = p.valueExpr(0)
 
 			localctx.(*SrcAccountUnboundedOverdraftContext).address = _x
 		}
-		p.SetState(141)
+		p.SetState(142)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -3634,13 +3740,13 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 		if _la == NumscriptParserRESTRICT {
 			{
-				p.SetState(140)
+				p.SetState(141)
 				p.ColorConstraint()
 			}
 
 		}
 		{
-			p.SetState(143)
+			p.SetState(144)
 			p.Match(NumscriptParserALLOWING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3648,7 +3754,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(144)
+			p.SetState(145)
 			p.Match(NumscriptParserUNBOUNDED)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3656,7 +3762,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(145)
+			p.SetState(146)
 			p.Match(NumscriptParserOVERDRAFT)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3666,15 +3772,16 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 	case 2:
 		localctx = NewSrcAccountBoundedOverdraftContext(p, localctx)
-		p.EnterOuterAlt(localctx, 2)
+		p.SetParserRuleContext(localctx)
+		_prevctx = localctx
 		{
-			p.SetState(147)
+			p.SetState(148)
 
 			var _x = p.valueExpr(0)
 
 			localctx.(*SrcAccountBoundedOverdraftContext).address = _x
 		}
-		p.SetState(149)
+		p.SetState(150)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -3683,13 +3790,13 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 		if _la == NumscriptParserRESTRICT {
 			{
-				p.SetState(148)
+				p.SetState(149)
 				p.ColorConstraint()
 			}
 
 		}
 		{
-			p.SetState(151)
+			p.SetState(152)
 			p.Match(NumscriptParserALLOWING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3697,7 +3804,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(152)
+			p.SetState(153)
 			p.Match(NumscriptParserOVERDRAFT)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3705,7 +3812,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(153)
+			p.SetState(154)
 			p.Match(NumscriptParserUP)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3713,7 +3820,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(154)
+			p.SetState(155)
 			p.Match(NumscriptParserTO)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3721,7 +3828,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(155)
+			p.SetState(156)
 
 			var _x = p.valueExpr(0)
 
@@ -3730,51 +3837,51 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 	case 3:
 		localctx = NewSrcAccountContext(p, localctx)
-		p.EnterOuterAlt(localctx, 3)
+		p.SetParserRuleContext(localctx)
+		_prevctx = localctx
 		{
-			p.SetState(157)
+			p.SetState(158)
 			p.valueExpr(0)
 		}
-		p.SetState(159)
+		p.SetState(160)
 		p.GetErrorHandler().Sync(p)
-		if p.HasError() {
-			goto errorExit
-		}
-		_la = p.GetTokenStream().LA(1)
 
-		if _la == NumscriptParserRESTRICT {
+		if p.GetInterpreter().AdaptivePredict(p.BaseParser, p.GetTokenStream(), 14, p.GetParserRuleContext()) == 1 {
 			{
-				p.SetState(158)
+				p.SetState(159)
 				p.ColorConstraint()
 			}
 
+		} else if p.HasError() { // JIM
+			goto errorExit
 		}
 
 	case 4:
 		localctx = NewSrcAllotmentContext(p, localctx)
-		p.EnterOuterAlt(localctx, 4)
+		p.SetParserRuleContext(localctx)
+		_prevctx = localctx
 		{
-			p.SetState(161)
+			p.SetState(162)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(163)
+		p.SetState(164)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
 		}
 		_la = p.GetTokenStream().LA(1)
 
-		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939217707008) != 0) {
+		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&9878435340288) != 0) {
 			{
-				p.SetState(162)
+				p.SetState(163)
 				p.AllotmentClauseSrc()
 			}
 
-			p.SetState(165)
+			p.SetState(166)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -3782,7 +3889,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(167)
+			p.SetState(168)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3792,29 +3899,30 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 	case 5:
 		localctx = NewSrcInorderContext(p, localctx)
-		p.EnterOuterAlt(localctx, 5)
+		p.SetParserRuleContext(localctx)
+		_prevctx = localctx
 		{
-			p.SetState(169)
+			p.SetState(170)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(173)
+		p.SetState(174)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
 		}
 		_la = p.GetTokenStream().LA(1)
 
-		for (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939234607168) != 0 {
+		for (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&9878469017664) != 0 {
 			{
-				p.SetState(170)
-				p.Source()
+				p.SetState(171)
+				p.source(0)
 			}
 
-			p.SetState(175)
+			p.SetState(176)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -3822,7 +3930,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(176)
+			p.SetState(177)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3832,9 +3940,10 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 	case 6:
 		localctx = NewSrcOneofContext(p, localctx)
-		p.EnterOuterAlt(localctx, 6)
+		p.SetParserRuleContext(localctx)
+		_prevctx = localctx
 		{
-			p.SetState(177)
+			p.SetState(178)
 			p.Match(NumscriptParserONEOF)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3842,27 +3951,27 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(178)
+			p.SetState(179)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(180)
+		p.SetState(181)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
 		}
 		_la = p.GetTokenStream().LA(1)
 
-		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939234607168) != 0) {
+		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&9878469017664) != 0) {
 			{
-				p.SetState(179)
-				p.Source()
+				p.SetState(180)
+				p.source(0)
 			}
 
-			p.SetState(182)
+			p.SetState(183)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -3870,7 +3979,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(184)
+			p.SetState(185)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3880,9 +3989,10 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 	case 7:
 		localctx = NewSrcCappedContext(p, localctx)
-		p.EnterOuterAlt(localctx, 7)
+		p.SetParserRuleContext(localctx)
+		_prevctx = localctx
 		{
-			p.SetState(186)
+			p.SetState(187)
 			p.Match(NumscriptParserMAX)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3890,14 +4000,14 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(187)
+			p.SetState(188)
 
 			var _x = p.valueExpr(0)
 
 			localctx.(*SrcCappedContext).cap_ = _x
 		}
 		{
-			p.SetState(188)
+			p.SetState(189)
 			p.Match(NumscriptParserFROM)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3905,13 +4015,66 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(189)
-			p.Source()
+			p.SetState(190)
+			p.source(2)
 		}
 
 	case antlr.ATNInvalidAltNumber:
 		goto errorExit
 	}
+	p.GetParserRuleContext().SetStop(p.GetTokenStream().LT(-1))
+	p.SetState(199)
+	p.GetErrorHandler().Sync(p)
+	if p.HasError() {
+		goto errorExit
+	}
+	_alt = p.GetInterpreter().AdaptivePredict(p.BaseParser, p.GetTokenStream(), 19, p.GetParserRuleContext())
+	if p.HasError() {
+		goto errorExit
+	}
+	for _alt != 2 && _alt != antlr.ATNInvalidAltNumber {
+		if _alt == 1 {
+			if p.GetParseListeners() != nil {
+				p.TriggerExitRuleEvent()
+			}
+			_prevctx = localctx
+			localctx = NewSrcThroughContext(p, NewSourceContext(p, _parentctx, _parentState))
+			localctx.(*SrcThroughContext).src = _prevctx
+
+			p.PushNewRecursionContext(localctx, _startState, NumscriptParserRULE_source)
+			p.SetState(194)
+
+			if !(p.Precpred(p.GetParserRuleContext(), 1)) {
+				p.SetError(antlr.NewFailedPredicateException(p, "p.Precpred(p.GetParserRuleContext(), 1)", ""))
+				goto errorExit
+			}
+			{
+				p.SetState(195)
+				p.Match(NumscriptParserTHROUGH)
+				if p.HasError() {
+					// Recognition error - abort rule
+					goto errorExit
+				}
+			}
+			{
+				p.SetState(196)
+
+				var _x = p.source(2)
+
+				localctx.(*SrcThroughContext).proxy = _x
+			}
+
+		}
+		p.SetState(201)
+		p.GetErrorHandler().Sync(p)
+		if p.HasError() {
+			goto errorExit
+		}
+		_alt = p.GetInterpreter().AdaptivePredict(p.BaseParser, p.GetTokenStream(), 19, p.GetParserRuleContext())
+		if p.HasError() {
+			goto errorExit
+		}
+	}
 
 errorExit:
 	if p.HasError() {
@@ -3921,7 +4084,7 @@ errorExit:
 		p.GetErrorHandler().Recover(p, v)
 		p.SetError(nil)
 	}
-	p.ExitRule()
+	p.UnrollRecursionContexts(_parentctx)
 	return localctx
 	goto errorExit // Trick to prevent compiler error if the label is not used
 }
@@ -4035,11 +4198,11 @@ func (p *NumscriptParser) AllotmentClauseSrc() (localctx IAllotmentClauseSrcCont
 	p.EnterRule(localctx, 26, NumscriptParserRULE_allotmentClauseSrc)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(193)
+		p.SetState(202)
 		p.Allotment()
 	}
 	{
-		p.SetState(194)
+		p.SetState(203)
 		p.Match(NumscriptParserFROM)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -4047,8 +4210,8 @@ func (p *NumscriptParser) AllotmentClauseSrc() (localctx IAllotmentClauseSrcCont
 		}
 	}
 	{
-		p.SetState(195)
-		p.Source()
+		p.SetState(204)
+		p.source(0)
 	}
 
 errorExit:
@@ -4205,7 +4368,7 @@ func (s *DestinationToContext) ExitRule(listener antlr.ParseTreeListener) {
 func (p *NumscriptParser) KeptOrDestination() (localctx IKeptOrDestinationContext) {
 	localctx = NewKeptOrDestinationContext(p, p.GetParserRuleContext(), p.GetState())
 	p.EnterRule(localctx, 28, NumscriptParserRULE_keptOrDestination)
-	p.SetState(200)
+	p.SetState(209)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -4216,7 +4379,7 @@ func (p *NumscriptParser) KeptOrDestination() (localctx IKeptOrDestinationContex
 		localctx = NewDestinationToContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(197)
+			p.SetState(206)
 			p.Match(NumscriptParserTO)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4224,7 +4387,7 @@ func (p *NumscriptParser) KeptOrDestination() (localctx IKeptOrDestinationContex
 			}
 		}
 		{
-			p.SetState(198)
+			p.SetState(207)
 			p.Destination()
 		}
 
@@ -4232,7 +4395,7 @@ func (p *NumscriptParser) KeptOrDestination() (localctx IKeptOrDestinationContex
 		localctx = NewDestinationKeptContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(199)
+			p.SetState(208)
 			p.Match(NumscriptParserKEPT)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4367,7 +4530,7 @@ func (p *NumscriptParser) DestinationInOrderClause() (localctx IDestinationInOrd
 	p.EnterRule(localctx, 30, NumscriptParserRULE_destinationInOrderClause)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(202)
+		p.SetState(211)
 		p.Match(NumscriptParserMAX)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -4375,11 +4538,11 @@ func (p *NumscriptParser) DestinationInOrderClause() (localctx IDestinationInOrd
 		}
 	}
 	{
-		p.SetState(203)
+		p.SetState(212)
 		p.valueExpr(0)
 	}
 	{
-		p.SetState(204)
+		p.SetState(213)
 		p.KeptOrDestination()
 	}
 
@@ -4782,18 +4945,18 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 	p.EnterRule(localctx, 32, NumscriptParserRULE_destination)
 	var _la int
 
-	p.SetState(238)
+	p.SetState(247)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
 	}
 
-	switch p.GetInterpreter().AdaptivePredict(p.BaseParser, p.GetTokenStream(), 23, p.GetParserRuleContext()) {
+	switch p.GetInterpreter().AdaptivePredict(p.BaseParser, p.GetTokenStream(), 24, p.GetParserRuleContext()) {
 	case 1:
 		localctx = NewDestAccountContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(206)
+			p.SetState(215)
 			p.valueExpr(0)
 		}
 
@@ -4801,27 +4964,27 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 		localctx = NewDestAllotmentContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(207)
+			p.SetState(216)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(209)
+		p.SetState(218)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
 		}
 		_la = p.GetTokenStream().LA(1)
 
-		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939217707008) != 0) {
+		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&9878435340288) != 0) {
 			{
-				p.SetState(208)
+				p.SetState(217)
 				p.AllotmentClauseDest()
 			}
 
-			p.SetState(211)
+			p.SetState(220)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -4829,7 +4992,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(213)
+			p.SetState(222)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4841,14 +5004,14 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 		localctx = NewDestInorderContext(p, localctx)
 		p.EnterOuterAlt(localctx, 3)
 		{
-			p.SetState(215)
+			p.SetState(224)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(219)
+		p.SetState(228)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -4857,11 +5020,11 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 
 		for _la == NumscriptParserMAX {
 			{
-				p.SetState(216)
+				p.SetState(225)
 				p.DestinationInOrderClause()
 			}
 
-			p.SetState(221)
+			p.SetState(230)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -4869,7 +5032,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(222)
+			p.SetState(231)
 			p.Match(NumscriptParserREMAINING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4877,11 +5040,11 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			}
 		}
 		{
-			p.SetState(223)
+			p.SetState(232)
 			p.KeptOrDestination()
 		}
 		{
-			p.SetState(224)
+			p.SetState(233)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4893,7 +5056,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 		localctx = NewDestOneofContext(p, localctx)
 		p.EnterOuterAlt(localctx, 4)
 		{
-			p.SetState(226)
+			p.SetState(235)
 			p.Match(NumscriptParserONEOF)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4901,14 +5064,14 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			}
 		}
 		{
-			p.SetState(227)
+			p.SetState(236)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(231)
+		p.SetState(240)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -4917,11 +5080,11 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 
 		for _la == NumscriptParserMAX {
 			{
-				p.SetState(228)
+				p.SetState(237)
 				p.DestinationInOrderClause()
 			}
 
-			p.SetState(233)
+			p.SetState(242)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -4929,7 +5092,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(234)
+			p.SetState(243)
 			p.Match(NumscriptParserREMAINING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4937,11 +5100,11 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			}
 		}
 		{
-			p.SetState(235)
+			p.SetState(244)
 			p.KeptOrDestination()
 		}
 		{
-			p.SetState(236)
+			p.SetState(245)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5070,11 +5233,11 @@ func (p *NumscriptParser) AllotmentClauseDest() (localctx IAllotmentClauseDestCo
 	p.EnterRule(localctx, 34, NumscriptParserRULE_allotmentClauseDest)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(240)
+		p.SetState(249)
 		p.Allotment()
 	}
 	{
-		p.SetState(241)
+		p.SetState(250)
 		p.KeptOrDestination()
 	}
 
@@ -5240,18 +5403,18 @@ func (s *SentLiteralContext) ExitRule(listener antlr.ParseTreeListener) {
 func (p *NumscriptParser) SentValue() (localctx ISentValueContext) {
 	localctx = NewSentValueContext(p, p.GetParserRuleContext(), p.GetState())
 	p.EnterRule(localctx, 36, NumscriptParserRULE_sentValue)
-	p.SetState(245)
+	p.SetState(254)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
 	}
 
-	switch p.GetInterpreter().AdaptivePredict(p.BaseParser, p.GetTokenStream(), 24, p.GetParserRuleContext()) {
+	switch p.GetInterpreter().AdaptivePredict(p.BaseParser, p.GetTokenStream(), 25, p.GetParserRuleContext()) {
 	case 1:
 		localctx = NewSentLiteralContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(243)
+			p.SetState(252)
 			p.valueExpr(0)
 		}
 
@@ -5259,7 +5422,7 @@ func (p *NumscriptParser) SentValue() (localctx ISentValueContext) {
 		localctx = NewSentAllContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(244)
+			p.SetState(253)
 			p.SentAllLit()
 		}
 
@@ -5559,7 +5722,7 @@ func (s *FnCallStatementContext) ExitRule(listener antlr.ParseTreeListener) {
 func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 	localctx = NewStatementContext(p, p.GetParserRuleContext(), p.GetState())
 	p.EnterRule(localctx, 38, NumscriptParserRULE_statement)
-	p.SetState(264)
+	p.SetState(273)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -5570,7 +5733,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 		localctx = NewSendStatementContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(247)
+			p.SetState(256)
 			p.Match(NumscriptParserSEND)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5578,11 +5741,11 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(248)
+			p.SetState(257)
 			p.SentValue()
 		}
 		{
-			p.SetState(249)
+			p.SetState(258)
 			p.Match(NumscriptParserLPARENS)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5590,7 +5753,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(250)
+			p.SetState(259)
 			p.Match(NumscriptParserSOURCE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5598,7 +5761,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(251)
+			p.SetState(260)
 			p.Match(NumscriptParserEQ)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5606,11 +5769,11 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(252)
-			p.Source()
+			p.SetState(261)
+			p.source(0)
 		}
 		{
-			p.SetState(253)
+			p.SetState(262)
 			p.Match(NumscriptParserDESTINATION)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5618,7 +5781,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(254)
+			p.SetState(263)
 			p.Match(NumscriptParserEQ)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5626,11 +5789,11 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(255)
+			p.SetState(264)
 			p.Destination()
 		}
 		{
-			p.SetState(256)
+			p.SetState(265)
 			p.Match(NumscriptParserRPARENS)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5642,7 +5805,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 		localctx = NewSaveStatementContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(258)
+			p.SetState(267)
 			p.Match(NumscriptParserSAVE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5650,11 +5813,11 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(259)
+			p.SetState(268)
 			p.SentValue()
 		}
 		{
-			p.SetState(260)
+			p.SetState(269)
 			p.Match(NumscriptParserFROM)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5662,7 +5825,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(261)
+			p.SetState(270)
 			p.valueExpr(0)
 		}
 
@@ -5670,7 +5833,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 		localctx = NewFnCallStatementContext(p, localctx)
 		p.EnterOuterAlt(localctx, 3)
 		{
-			p.SetState(263)
+			p.SetState(272)
 			p.FunctionCall()
 		}
 
@@ -5701,6 +5864,13 @@ func (p *NumscriptParser) Sempred(localctx antlr.RuleContext, ruleIndex, predInd
 		}
 		return p.ValueExpr_Sempred(t, predIndex)
 
+	case 12:
+		var t *SourceContext = nil
+		if localctx != nil {
+			t = localctx.(*SourceContext)
+		}
+		return p.Source_Sempred(t, predIndex)
+
 	default:
 		panic("No predicate with index: " + fmt.Sprint(ruleIndex))
 	}
@@ -5718,3 +5888,13 @@ func (p *NumscriptParser) ValueExpr_Sempred(localctx antlr.RuleContext, predInde
 		panic("No predicate with index: " + fmt.Sprint(predIndex))
 	}
 }
+
+func (p *NumscriptParser) Source_Sempred(localctx antlr.RuleContext, predIndex int) bool {
+	switch predIndex {
+	case 2:
+		return p.Precpred(p.GetParserRuleContext(), 1)
+
+	default:
+		panic("No predicate with index: " + fmt.Sprint(predIndex))
+	}
+}
diff --git a/internal/parser/ast.go b/internal/parser/ast.go
index 5dd4d776..d3f0b9ac 100644
--- a/internal/parser/ast.go
+++ b/internal/parser/ast.go
@@ -130,6 +130,7 @@ func (*SourceAllotment) source() {}
 func (*SourceAccount) source()   {}
 func (*SourceCapped) source()    {}
 func (*SourceOverdraft) source() {}
+func (*SourceThrough) source()   {}
 
 type (
 	SourceAccount struct {
@@ -170,6 +171,12 @@ type (
 		Address ValueExpr
 		Bounded *ValueExpr
 	}
+
+	SourceThrough struct {
+		Range
+		Source Source
+		Proxy  Source
+	}
 )
 
 type AllotmentValue interface{ allotmentValue() }
diff --git a/internal/parser/parser.go b/internal/parser/parser.go
index 4e37d84a..4f82c457 100644
--- a/internal/parser/parser.go
+++ b/internal/parser/parser.go
@@ -243,6 +243,13 @@ func parseSource(sourceCtx antlrParser.ISourceContext) Source {
 			Bounded: &varMon,
 		}
 
+	case *antlrParser.SrcThroughContext:
+		return &SourceThrough{
+			Range:  ctxToRange(sourceCtx),
+			Source: parseSource(sourceCtx.GetSrc()),
+			Proxy:  parseSource(sourceCtx.GetProxy()),
+		}
+
 	case *antlrParser.SourceContext:
 		return nil
 
diff --git a/internal/parser/parser_test.go b/internal/parser/parser_test.go
index 3b70400e..273f4e6d 100644
--- a/internal/parser/parser_test.go
+++ b/internal/parser/parser_test.go
@@ -501,3 +501,14 @@ func TestColorRestrictionUnboundedOverdraft(t *testing.T) {
 	snaps.MatchSnapshot(t, p.Value)
 	assert.Empty(t, p.Errors)
 }
+
+func TestThroughSimple(t *testing.T) {
+	p := parser.Parse(`
+send $amt (
+	source = @a through @b
+	destination = @dest
+)
+`)
+	require.Len(t, p.Errors, 0)
+	snaps.MatchSnapshot(t, p.Value)
+}