add litecoin. implement custom wire types for tx and block

assets/assets.go

@@ -2,13 +2,15 @@ package assets
 
 import (
 	"fmt"
+	"math"
 	"math/big"
 
 	"github.com/bisoncraft/utxowallet/netparams"
+	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 )
 
-func NetParams(chain, net string) (p *netparams.ChainParams, _ error) {
+func NetParams(chain, net string) (p *netparams.ChainParams, err error) {
 	switch chain {
 	case "btc":
 		p = BTCParams[net]
@@ -18,6 +20,9 @@ func NetParams(chain, net string) (p *netparams.ChainParams, _ error) {
 	if p == nil {
 		return nil, fmt.Errorf("no net params for chain %s, network %s", chain, net)
 	}
+	registerParams := *p.BTCDParams() // populate the internal btcParams field
+	registerParams.Net = math.MaxUint32
+	err = chaincfg.Register(&registerParams)
 	return
 }
 

assets/assets_test.go

@@ -0,0 +1,23 @@
+package assets
+
+import "testing"
+
+func TestParams(t *testing.T) {
+	for chain, nets := range map[string][]string{
+		"btc": {"mainnet", "testnet", "simnet"},
+		"ltc": {"mainnet", "testnet", "simnet"},
+	} {
+		for _, net := range nets {
+			t.Run(chain+"."+net, func(t *testing.T) {
+				chainParams, _ := NetParams(chain, net)
+				h := chainParams.GenesisBlock.BlockHash()
+				if h != *chainParams.GenesisHash {
+					t.Fatalf("Genesis hash mismatch")
+				}
+				if chainParams.Chain != chain {
+					t.Fatalf("Wrong chain. %s != %s", chainParams.Chain, chain)
+				}
+			})
+		}
+	}
+}

assets/btc.go

@@ -22,6 +22,7 @@ var genesisMerkleRoot = chainhash.Hash([chainhash.HashSize]byte{ // Make go vet
 
 var BTCParams = map[string]*netparams.ChainParams{
 	"mainnet": {
+		Chain:       "btc",
 		Name:        "mainnet",
 		Net:         wire.MainNet,
 		DefaultPort: "8333",
@@ -95,9 +96,12 @@ var BTCParams = map[string]*netparams.ChainParams{
 			0x68, 0xd6, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
 		}),
 		PowLimit:                 new(big.Int).Sub(new(big.Int).Lsh(bigOne, 224), bigOne),
+		PowLimitBits:             0x1d00ffff,
 		TargetTimespan:           time.Hour * 24 * 14, // 14 days
 		TargetTimePerBlock:       time.Minute * 10,    // 10 minutes
 		RetargetAdjustmentFactor: 4,                   // 25% less, 400% more
+		ReduceMinDifficulty:      false,
+		MinDiffReductionTime:     0,
 
 		// Checkpoints ordered from oldest to newest.
 		Checkpoints: []chaincfg.Checkpoint{
@@ -144,14 +148,17 @@ var BTCParams = map[string]*netparams.ChainParams{
 		WitnessPubKeyHashAddrID: 0x06, // starts with p2
 		WitnessScriptHashAddrID: 0x0A, // starts with 7Xh
 		// BIP32 hierarchical deterministic extended key magics
-		HDPrivateKeyID: [4]byte{0x04, 0x88, 0xad, 0xe4}, // starts with xprv
-		HDPublicKeyID:  [4]byte{0x04, 0x88, 0xb2, 0x1e}, // starts with xpub
-		HDCoinType:     0,
-		BIP0034Height:  227931, // 000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8
-		BIP0065Height:  388381, // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
-		BIP0066Height:  363725, // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
+		HDPrivateKeyID:   [4]byte{0x04, 0x88, 0xad, 0xe4}, // starts with xprv
+		HDPublicKeyID:    [4]byte{0x04, 0x88, 0xb2, 0x1e}, // starts with xpub
+		HDCoinType:       0,
+		BIP0034Height:    227931, // 000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8
+		BIP0065Height:    388381, // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
+		BIP0066Height:    363725, // 00000000000000000379eaa19dce8c9b722d46ae6a57c2f1a988119488b50931
+		CoinbaseMaturity: 100,
+		MaxSatoshi:       btcutil.MaxSatoshi,
 	},
 	"testnet": {
+		Chain:       "btc",
 		Name:        "testnet3",
 		Net:         wire.TestNet3,
 		DefaultPort: "18333",
@@ -219,9 +226,12 @@ var BTCParams = map[string]*netparams.ChainParams{
 			0x01, 0xea, 0x33, 0x09, 0x00, 0x00, 0x00, 0x00,
 		}),
 		PowLimit:                 new(big.Int).Sub(new(big.Int).Lsh(bigOne, 224), bigOne),
+		PowLimitBits:             0x1d00ffff,
 		TargetTimespan:           time.Hour * 24 * 14, // 14 days
 		TargetTimePerBlock:       time.Minute * 10,    // 10 minutes
 		RetargetAdjustmentFactor: 4,                   // 25% less, 400% more
+		ReduceMinDifficulty:      true,
+		MinDiffReductionTime:     time.Minute * 20, // TargetTimePerBlock * 2
 
 		// Checkpoints ordered from oldest to newest.
 		Checkpoints: []chaincfg.Checkpoint{
@@ -261,11 +271,14 @@ var BTCParams = map[string]*netparams.ChainParams{
 		BIP0034Height:           21111,  // 0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8
 		BIP0065Height:           581885, // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
 		BIP0066Height:           330776, // 000000002104c8c45e99a8853285a3b592602a3ccde2b832481da85e9e4ba182
+		CoinbaseMaturity:        100,
+		MaxSatoshi:              btcutil.MaxSatoshi,
 	},
 	"simnet": {
+		Chain:       "btc",
 		Name:        "regtest",
 		Net:         wire.TestNet,
-		DefaultPort: "18444",
+		DefaultPort: "20575", // 18444 // Changed to match dcrdex testing harness
 		DNSSeeds:    []chaincfg.DNSSeed{},
 		GenesisBlock: &wire.MsgBlock{
 			Header: wire.BlockHeader{
@@ -325,9 +338,13 @@ var BTCParams = map[string]*netparams.ChainParams{
 			0xc7, 0xb2, 0xb7, 0x3c, 0xf1, 0x88, 0x91, 0x0f,
 		}),
 		PowLimit:                 new(big.Int).Sub(new(big.Int).Lsh(bigOne, 255), bigOne),
+		PowLimitBits:             0x207fffff,
+		PoWNoRetargeting:         true,
 		TargetTimespan:           time.Hour * 24 * 14, // 14 days
 		TargetTimePerBlock:       time.Minute * 10,    // 10 minutes
 		RetargetAdjustmentFactor: 4,                   // 25% less, 400% more
+		ReduceMinDifficulty:      true,
+		MinDiffReductionTime:     time.Minute * 20, // TargetTimePerBlock * 2
 		Checkpoints:              nil,
 		Bech32HRPSegwit:          "bcrt",                          // always bcrt for reg test net
 		PubKeyHashAddrID:         0x6f,                            // starts with m or n
@@ -339,6 +356,7 @@ var BTCParams = map[string]*netparams.ChainParams{
 		BIP0034Height:            100000000, // Not active - Permit ver 1 blocks
 		BIP0065Height:            1351,      // Used by regression tests
 		BIP0066Height:            1251,      // Used by regression tests
+		CoinbaseMaturity:         100,
 		MaxSatoshi:               btcutil.MaxSatoshi,
 	},
 }