fixed issues: RPC DERO.GetTransactions & RPC transfer with integrated addresses; show raw tx when registration fails

[8lecramm]

Under certain conditions, the node throws a panic message when initiating a RPC call with an orphaned transaction.

curl http://pi:10102/json_rpc -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":"0","method":"DERO.GetTransaction","params":{"txs_hashes":["0000007c31430f3ce55f41c2ef91898618ed3ef7c5e82693b67af50d726d235e"]}}'

{
  "jsonrpc": "2.0",
  "id": "0",
  "error": {
    "code": -32098,
    "message": "panic occured. stack trace goroutine 245257 [running]:\nruntime/debug.Stack()\n\t/usr/local/go/src/runtime/debug/stack.go:24 +0x68\ngithub.com/deroproject/derohe/cmd/derod/rpc.GetTransaction.func1()\n\t/home/marcel/go/src/github.com/deroproject/derohe/cmd/derod/rpc/rpc_dero_gettransactions.go:39 +0x38\npanic({0x5add80, 0x4005d69860})\n\t/usr/local/go/src/runtime/panic.go:838 +0x20c\ngithub.com/deroproject/derohe/blockchain.(*Blockchain).Find_Blocks_Height_Range(0x4000076c60, 0x401333ba00?, 0x17)\n\t/home/marcel/go/src/github.com/deroproject/derohe/blockchain/storetopo.go:282 +0x2dc\ngithub.com/deroproject/derohe/blockchain.(*Blockchain).IS_TX_Valid(0x4000076c60, {0x0, 0x0, 0x0, 0x7c, 0x31, 0x43, 0xf, 0x3c, 0xe5, ...})\n\t/home/marcel/go/src/github.com/deroproject/derohe/blockchain/blockchain.go:1355 +0xb0\ngithub.com/deroproject/derohe/cmd/derod/rpc.GetTransaction({0x4005762390?, 0x40043f2560?}, {{0x4006280300?, 0xd?, 0x40077ef638?}, 0xa986c?})\n\t/home/marcel/go/src/github.com/deroproject/derohe/cmd/derod/rpc/rpc_dero_gettransactions.go:98 +0x35c\nreflect.Value.call({0x5469e0?, 0x684b50?, 0x4000044d98?}, {0x5e5c5d, 0x4}, {0x40057624b0, 0x2, 0x110fb0?})\n\t/usr/local/go/src/reflect/value.go:556 +0x5e4\nreflect.Value.Call({0x5469e0?, 0x684b50?, 0x57c8e0?}, {0x40057624b0, 0x2, 0x2})\n\t/usr/local/go/src/reflect/value.go:339 +0x98\ngithub.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2/handler.(*FuncInfo).Wrap.func10({0x739360?, 0x4005762390?}, 0x4000044e18?)\n\t/home/marcel/go/src/github.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2/handler/handler.go:244 +0x130\ngithub.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2/handler.Func.Handle(0x4000149360?, {0x739360?, 0x4005762390?}, 0x1?)\n\t/home/marcel/go/src/github.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2/handler/handler.go:25 +0x3c\ngithub.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2.(*Server).invoke(0x40000702a0, {0x7392b8?, 0x40062802c0?}, {0x735a20, 0x400047fb20}, 0x4006280280)\n\t/home/marcel/go/src/github.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2/server.go:379 +0x100\ngithub.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2.(*Server).dispatch.func1()\n\t/home/marcel/go/src/github.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2/server.go:230 +0x16c\ngithub.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2.(*Server).serve.func1()\n\t/home/marcel/go/src/github.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2/server.go:152 +0x5c\ncreated by github.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2.(*Server).serve\n\t/home/marcel/go/src/github.com/deroproject/derohe/vendor/github.com/creachadair/jrpc2/server.go:150 +0x28\n"
  }
}

[deroholic]

Tested and confirmed. This fixes the problem.

[8lecramm]

The second commit fixes an issue when trying to create a TX with more than 1 integrated address.
See issue #92
This function will return in any case.

if addr.IsIntegratedAddress() && len(transfers[t].Payload_RPC) == 0 {
	for _, arg := range addr.Arguments {
		if arg.Name == rpc.RPC_DESTINATION_PORT && addr.Arguments.Has(rpc.RPC_DESTINATION_PORT, rpc.DataUint64) {
			transfers[t].Payload_RPC = append(transfers[t].Payload_RPC, rpc.Argument{Name: rpc.RPC_DESTINATION_PORT, DataType: rpc.DataUint64, Value: addr.Arguments.Value(rpc.RPC_DESTINATION_PORT, rpc.DataUint64).(uint64)})
			continue
		} else {
			fmt.Printf("integrtated address, but don't know how to process\n")
			err = fmt.Errorf("integrated address used, but don't know how to process %+v", addr.Arguments)
		}
	}
	return   <----   at wrong place
}

The calling function tries to create the TX twice before throwing an error.
The first TX with an integrated address goes through, but crashes at the second one.

[8lecramm]

The 3rd commit shows the raw TX data when registration fails.
The data can be used to register the wallet via DERO.SendRawTransaction RPC call.