mirror of
https://github.com/FlipsideCrypto/dcrd.git
synced 2026-02-06 10:56:47 +00:00
fce24223cd
Decred's serialized format for transactions split the 32-bit version field into two 16-bit components such that the upper bits are used to encode a serialization type and the lower 16 bits are the actual transaction version. Unfortunately, when this was done, the in-memory transaction struct was not also updated to hide this complexity, which means that callers currently have to understand and take special care when dealing with the version field of the transaction. Since the main purpose of the wire package is precisely to hide these details, this remedies the situation by introducing a new field on the in-memory transaction struct named SerType which houses the serialization type and changes the Version field back to having the desired semantics of actually being the real transaction version. Also, since the maximum version can only be a 16-bit value, the Version field has been changed to a uint16 to properly reflect this. The serialization and deserialization functions now deal with properly converting to and from these fields to the actual serialized format as intended. Finally, these changes also include a fairly significant amount of related code cleanup and optimization along with some bug fixes in order to allow the transaction version to be bumped as intended. The following is an overview of all changes: - Introduce new SerType field to MsgTx to specify the serialization type - Change MsgTx.Version to a uint16 to properly reflect its maximum allowed value - Change the semantics of MsgTx.Version to be the actual transaction version as intended - Update all callers that had special code to deal with the previous Version field semantics to use the new semantics - Switch all of the code that deals with encoding and decoding the serialized version field to use more efficient masks and shifts instead of binary writes into buffers which cause allocations - Correct several issues that would prevent producing expected serializations for transactions with actual transaction versions that are not 1 - Simplify the various serialize functions to use a single func which accepts the serialization type to reduce code duplication - Make serialization type switch usage more consistent with the rest of the code base - Update the utxoview and related code to use uint16s for the transaction version as well since it should not care about the serialization type due to using its own - Make code more consistent in how it uses bytes.Buffer - Clean up several of the comments regarding hashes and add some new comments to better describe the serialization types
628 lines
16 KiB
Go
628 lines
16 KiB
Go
// Copyright (c) 2013-2015 The btcsuite developers
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// Copyright (c) 2015-2016 The Decred developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package txscript_test
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import (
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"bytes"
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"encoding/hex"
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"reflect"
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"testing"
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"github.com/decred/dcrd/chaincfg/chainhash"
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"github.com/decred/dcrd/txscript"
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"github.com/decred/dcrd/wire"
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)
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// TestPushedData ensured the PushedData function extracts the expected data out
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// of various scripts.
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func TestPushedData(t *testing.T) {
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t.Parallel()
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var tests = []struct {
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script string
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out [][]byte
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valid bool
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}{
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{
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"0 IF 0 ELSE 2 ENDIF",
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[][]byte{nil, nil},
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true,
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},
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{
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"16777216 10000000",
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[][]byte{
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{0x00, 0x00, 0x00, 0x01}, // 16777216
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{0x80, 0x96, 0x98, 0x00}, // 10000000
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},
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true,
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},
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{
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"DUP HASH160 '17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem' EQUALVERIFY CHECKSIG",
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[][]byte{
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// 17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem
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{
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0x31, 0x37, 0x56, 0x5a, 0x4e, 0x58, 0x31, 0x53, 0x4e, 0x35,
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0x4e, 0x74, 0x4b, 0x61, 0x38, 0x55, 0x51, 0x46, 0x78, 0x77,
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0x51, 0x62, 0x46, 0x65, 0x46, 0x63, 0x33, 0x69, 0x71, 0x52,
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0x59, 0x68, 0x65, 0x6d,
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},
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},
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true,
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},
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{
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"PUSHDATA4 1000 EQUAL",
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nil,
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false,
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},
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}
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for i, test := range tests {
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script := mustParseShortForm(test.script)
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data, err := txscript.PushedData(script)
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if test.valid && err != nil {
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t.Errorf("TestPushedData failed test #%d: %v\n", i, err)
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continue
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} else if !test.valid && err == nil {
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t.Errorf("TestPushedData failed test #%d: test should "+
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"be invalid\n", i)
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continue
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}
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if !reflect.DeepEqual(data, test.out) {
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t.Errorf("TestPushedData failed test #%d: want: %x "+
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"got: %x\n", i, test.out, data)
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}
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}
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}
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// TestHasCanonicalPush ensures the canonicalPush function works as expected.
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func TestHasCanonicalPush(t *testing.T) {
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t.Parallel()
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for i := 0; i < 65535; i++ {
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builder := txscript.NewScriptBuilder()
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builder.AddInt64(int64(i))
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script, err := builder.Script()
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if err != nil {
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t.Errorf("Script: test #%d unexpected error: %v\n", i,
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err)
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continue
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}
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if result := txscript.IsPushOnlyScript(script); !result {
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t.Errorf("IsPushOnlyScript: test #%d failed: %x\n", i,
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script)
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continue
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}
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pops, err := txscript.TstParseScript(script)
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if err != nil {
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t.Errorf("TstParseScript: #%d failed: %v", i, err)
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continue
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}
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for _, pop := range pops {
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if result := txscript.TstHasCanonicalPushes(pop); !result {
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t.Errorf("TstHasCanonicalPushes: test #%d "+
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"failed: %x\n", i, script)
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break
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}
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}
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}
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for i := 0; i <= txscript.MaxScriptElementSize; i++ {
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builder := txscript.NewScriptBuilder()
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builder.AddData(bytes.Repeat([]byte{0x49}, i))
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script, err := builder.Script()
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if err != nil {
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t.Errorf("StandardPushesTests test #%d unexpected error: %v\n", i, err)
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continue
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}
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if result := txscript.IsPushOnlyScript(script); !result {
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t.Errorf("StandardPushesTests IsPushOnlyScript test #%d failed: %x\n", i, script)
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continue
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}
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pops, err := txscript.TstParseScript(script)
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if err != nil {
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t.Errorf("StandardPushesTests #%d failed to TstParseScript: %v", i, err)
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continue
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}
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for _, pop := range pops {
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if result := txscript.TstHasCanonicalPushes(pop); !result {
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t.Errorf("StandardPushesTests TstHasCanonicalPushes test #%d failed: %x\n", i, script)
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break
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}
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}
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}
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}
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// TestGetPreciseSigOps ensures the more precise signature operation counting
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// mechanism which includes signatures in P2SH scripts works as expected.
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func TestGetPreciseSigOps(t *testing.T) {
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t.Parallel()
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tests := []struct {
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name string
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scriptSig []byte
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nSigOps int
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err error
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}{
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{
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name: "scriptSig doesn't parse",
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scriptSig: []byte{txscript.OP_PUSHDATA1, 2},
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err: txscript.ErrStackShortScript,
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},
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{
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name: "scriptSig isn't push only",
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scriptSig: []byte{txscript.OP_1, txscript.OP_DUP},
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nSigOps: 0,
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},
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{
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name: "scriptSig length 0",
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scriptSig: nil,
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nSigOps: 0,
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},
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{
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name: "No script at the end",
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// No script at end but still push only.
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scriptSig: []byte{txscript.OP_1, txscript.OP_1},
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nSigOps: 0,
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},
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{
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name: "pushed script doesn't parse",
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scriptSig: []byte{txscript.OP_DATA_2,
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txscript.OP_PUSHDATA1, 2},
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err: txscript.ErrStackShortScript,
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},
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}
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// The signature in the p2sh script is nonsensical for the tests since
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// this script will never be executed. What matters is that it matches
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// the right pattern.
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pkScript := mustParseShortForm("HASH160 DATA_20 0x433ec2ac1ffa1b7b7d0" +
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"27f564529c57197f9ae88 EQUAL")
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for _, test := range tests {
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count := txscript.GetPreciseSigOpCount(test.scriptSig, pkScript,
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true)
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if count != test.nSigOps {
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t.Errorf("%s: expected count of %d, got %d", test.name,
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test.nSigOps, count)
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}
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}
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}
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// TestRemoveOpcodes ensures that removing opcodes from scripts behaves as
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// expected.
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func TestRemoveOpcodes(t *testing.T) {
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t.Parallel()
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tests := []struct {
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name string
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before string
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remove byte
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err error
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after string
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}{
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{
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// Nothing to remove.
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name: "nothing to remove",
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before: "NOP",
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remove: txscript.OP_CODESEPARATOR,
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after: "NOP",
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},
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{
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// Test basic opcode removal.
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name: "codeseparator 1",
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before: "NOP CODESEPARATOR TRUE",
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remove: txscript.OP_CODESEPARATOR,
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after: "NOP TRUE",
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},
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{
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// The opcode in question is actually part of the data
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// in a previous opcode.
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name: "codeseparator by coincidence",
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before: "NOP DATA_1 CODESEPARATOR TRUE",
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remove: txscript.OP_CODESEPARATOR,
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after: "NOP DATA_1 CODESEPARATOR TRUE",
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},
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{
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name: "invalid opcode",
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before: "CAT",
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remove: txscript.OP_CODESEPARATOR,
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after: "CAT",
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},
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{
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name: "invalid length (insruction)",
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before: "PUSHDATA1",
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remove: txscript.OP_CODESEPARATOR,
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err: txscript.ErrStackShortScript,
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},
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{
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name: "invalid length (data)",
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before: "PUSHDATA1 0xff 0xfe",
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remove: txscript.OP_CODESEPARATOR,
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err: txscript.ErrStackShortScript,
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},
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}
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for _, test := range tests {
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before := mustParseShortForm(test.before)
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after := mustParseShortForm(test.after)
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result, err := txscript.TstRemoveOpcode(before, test.remove)
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if test.err != nil {
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if err != test.err {
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t.Errorf("%s: got unexpected error. exp: \"%v\" "+
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"got: \"%v\"", test.name, test.err, err)
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}
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return
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}
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if err != nil {
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t.Errorf("%s: unexpected failure: \"%v\"", test.name, err)
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return
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}
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if !bytes.Equal(after, result) {
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t.Errorf("%s: value does not equal expected: exp: \"%v\""+
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" got: \"%v\"", test.name, after, result)
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}
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}
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}
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// TestRemoveOpcodeByData ensures that removing data carrying opcodes based on
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// the data they contain works as expected.
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func TestRemoveOpcodeByData(t *testing.T) {
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t.Parallel()
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tests := []struct {
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name string
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before []byte
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remove []byte
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err error
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after []byte
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}{
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{
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name: "nothing to do",
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before: []byte{txscript.OP_NOP},
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remove: []byte{1, 2, 3, 4},
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after: []byte{txscript.OP_NOP},
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},
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{
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name: "simple case",
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before: []byte{txscript.OP_DATA_4, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: nil,
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},
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{
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name: "simple case (miss)",
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before: []byte{txscript.OP_DATA_4, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 5},
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after: []byte{txscript.OP_DATA_4, 1, 2, 3, 4},
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},
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// fix to allow for decred tests too
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/*
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{
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name: "stakesubmission",
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scriptclass: txscript.StakeSubmissionTy,
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stringed: "stakesubmission",
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},
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{
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name: "stakegen",
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scriptclass: txscript.StakeGenTy,
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stringed: "stakegen",
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},
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{
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name: "stakerevoke",
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scriptclass: txscript.StakeRevocationTy,
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stringed: "stakerevoke",
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},
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*/
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{
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// padded to keep it canonical.
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name: "simple case (pushdata1)",
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before: append(append([]byte{txscript.OP_PUSHDATA1, 76},
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bytes.Repeat([]byte{0}, 72)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4},
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after: nil,
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},
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{
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name: "simple case (pushdata1 miss)",
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before: append(append([]byte{txscript.OP_PUSHDATA1, 76},
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bytes.Repeat([]byte{0}, 72)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 5},
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after: append(append([]byte{txscript.OP_PUSHDATA1, 76},
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bytes.Repeat([]byte{0}, 72)...),
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[]byte{1, 2, 3, 4}...),
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},
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{
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name: "simple case (pushdata1 miss noncanonical)",
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before: []byte{txscript.OP_PUSHDATA1, 4, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: []byte{txscript.OP_PUSHDATA1, 4, 1, 2, 3, 4},
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},
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{
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name: "simple case (pushdata2)",
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before: append(append([]byte{txscript.OP_PUSHDATA2, 0, 1},
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bytes.Repeat([]byte{0}, 252)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4},
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after: nil,
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},
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{
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name: "simple case (pushdata2 miss)",
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before: append(append([]byte{txscript.OP_PUSHDATA2, 0, 1},
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bytes.Repeat([]byte{0}, 252)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4, 5},
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after: append(append([]byte{txscript.OP_PUSHDATA2, 0, 1},
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bytes.Repeat([]byte{0}, 252)...),
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[]byte{1, 2, 3, 4}...),
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},
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{
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name: "simple case (pushdata2 miss noncanonical)",
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before: []byte{txscript.OP_PUSHDATA2, 4, 0, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: []byte{txscript.OP_PUSHDATA2, 4, 0, 1, 2, 3, 4},
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},
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{
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// This is padded to make the push canonical.
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name: "simple case (pushdata4)",
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before: append(append([]byte{txscript.OP_PUSHDATA4, 0, 0, 1, 0},
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bytes.Repeat([]byte{0}, 65532)...),
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[]byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4},
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after: nil,
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},
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{
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name: "simple case (pushdata4 miss noncanonical)",
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before: []byte{txscript.OP_PUSHDATA4, 4, 0, 0, 0, 1, 2, 3, 4},
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remove: []byte{1, 2, 3, 4},
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after: []byte{txscript.OP_PUSHDATA4, 4, 0, 0, 0, 1, 2, 3, 4},
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},
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{
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// This is padded to make the push canonical.
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name: "simple case (pushdata4 miss)",
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before: append(append([]byte{txscript.OP_PUSHDATA4, 0, 0, 1, 0},
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bytes.Repeat([]byte{0}, 65532)...), []byte{1, 2, 3, 4}...),
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remove: []byte{1, 2, 3, 4, 5},
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after: append(append([]byte{txscript.OP_PUSHDATA4, 0, 0, 1, 0},
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bytes.Repeat([]byte{0}, 65532)...), []byte{1, 2, 3, 4}...),
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},
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{
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name: "invalid opcode ",
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before: []byte{txscript.OP_UNKNOWN192},
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remove: []byte{1, 2, 3, 4},
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after: []byte{txscript.OP_UNKNOWN192},
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},
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{
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name: "invalid length (instruction)",
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before: []byte{txscript.OP_PUSHDATA1},
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remove: []byte{1, 2, 3, 4},
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err: txscript.ErrStackShortScript,
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},
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{
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name: "invalid length (data)",
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before: []byte{txscript.OP_PUSHDATA1, 255, 254},
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remove: []byte{1, 2, 3, 4},
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err: txscript.ErrStackShortScript,
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},
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}
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for _, test := range tests {
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result, err := txscript.TstRemoveOpcodeByData(test.before,
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test.remove)
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if test.err != nil {
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if err != test.err {
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t.Errorf("%s: got unexpected error. exp: \"%v\" "+
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"got: \"%v\"", test.name, test.err, err)
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}
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return
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}
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if err != nil {
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t.Errorf("%s: unexpected failure: \"%v\"", test.name, err)
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return
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}
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if !bytes.Equal(test.after, result) {
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t.Errorf("%s: value does not equal expected: exp: \"%v\""+
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" got: \"%v\"", test.name, test.after, result)
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}
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}
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}
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|
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// TestIsPayToScriptHash ensures the IsPayToScriptHash function returns the
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// expected results for all the scripts in scriptClassTests.
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func TestIsPayToScriptHash(t *testing.T) {
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t.Parallel()
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|
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for _, test := range scriptClassTests {
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script := mustParseShortForm(test.script)
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shouldBe := (test.class == txscript.ScriptHashTy)
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p2sh := txscript.IsPayToScriptHash(script)
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if p2sh != shouldBe {
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t.Errorf("%s: epxected p2sh %v, got %v", test.name,
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shouldBe, p2sh)
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}
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}
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}
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|
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// TestHasCanonicalPushes ensures the canonicalPush function properly determines
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// what is considered a canonical push for the purposes of removeOpcodeByData.
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|
func TestHasCanonicalPushes(t *testing.T) {
|
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t.Parallel()
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|
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tests := []struct {
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name string
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script string
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expected bool
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}{
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{
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name: "does not parse",
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script: "0x046708afdb0fe5548271967f1a67130b7105cd6a82" +
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"8e03909a67962e0ea1f61d",
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expected: false,
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},
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{
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name: "non-canonical push",
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script: "PUSHDATA1 0x04 0x01020304",
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expected: false,
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},
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}
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|
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for i, test := range tests {
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|
script := mustParseShortForm(test.script)
|
|
pops, err := txscript.TstParseScript(script)
|
|
if err != nil {
|
|
if test.expected {
|
|
t.Errorf("TstParseScript #%d failed: %v", i, err)
|
|
}
|
|
continue
|
|
}
|
|
for _, pop := range pops {
|
|
if txscript.TstHasCanonicalPushes(pop) != test.expected {
|
|
t.Errorf("TstHasCanonicalPushes: #%d (%s) "+
|
|
"wrong result\ngot: %v\nwant: %v", i,
|
|
test.name, true, test.expected)
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestIsPushOnlyScript ensures the IsPushOnlyScript function returns the
|
|
// expected results.
|
|
func TestIsPushOnlyScript(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
test := struct {
|
|
name string
|
|
script []byte
|
|
expected bool
|
|
}{
|
|
name: "does not parse",
|
|
script: mustParseShortForm("0x046708afdb0fe5548271967f1a67130" +
|
|
"b7105cd6a828e03909a67962e0ea1f61d"),
|
|
expected: false,
|
|
}
|
|
|
|
if txscript.IsPushOnlyScript(test.script) != test.expected {
|
|
t.Errorf("IsPushOnlyScript (%s) wrong result\ngot: %v\nwant: "+
|
|
"%v", test.name, true, test.expected)
|
|
}
|
|
}
|
|
|
|
// TestCalcSignatureHash does some rudimentary testing of msg hash calculation.
|
|
func TestCalcSignatureHash(t *testing.T) {
|
|
tx := new(wire.MsgTx)
|
|
tx.SerType = wire.TxSerializeFull
|
|
tx.Version = 1
|
|
for i := 0; i < 3; i++ {
|
|
txIn := new(wire.TxIn)
|
|
txIn.Sequence = 0xFFFFFFFF
|
|
txIn.PreviousOutPoint.Hash = chainhash.HashH([]byte{byte(i)})
|
|
txIn.PreviousOutPoint.Index = uint32(i)
|
|
txIn.PreviousOutPoint.Tree = int8(0)
|
|
tx.AddTxIn(txIn)
|
|
}
|
|
for i := 0; i < 2; i++ {
|
|
txOut := new(wire.TxOut)
|
|
txOut.PkScript = []byte{0x01, 0x01, 0x02, 0x03}
|
|
txOut.Value = 0x0000FF00FF00FF00
|
|
tx.AddTxOut(txOut)
|
|
}
|
|
|
|
want, _ := hex.DecodeString("d09285b6f60c71329323bc2e76c48" +
|
|
"a462cde4e1032aa8f59c55823f1722c7f4a")
|
|
pops, _ := txscript.TstParseScript([]byte{0x01, 0x01, 0x02, 0x03})
|
|
|
|
// Test prefix caching.
|
|
msg1, err := txscript.CalcSignatureHash(pops, txscript.SigHashAll, tx, 0, nil)
|
|
if err != nil {
|
|
t.Fatalf("unexpected error %v", err.Error())
|
|
}
|
|
|
|
prefixHash := tx.TxHash()
|
|
msg2, err := txscript.CalcSignatureHash(pops, txscript.SigHashAll, tx, 0,
|
|
&prefixHash)
|
|
if err != nil {
|
|
t.Fatalf("unexpected error %v", err.Error())
|
|
}
|
|
|
|
if !bytes.Equal(msg1, want) {
|
|
t.Errorf("for sighash all sig noncached wrong msg %x given, want %x",
|
|
msg1,
|
|
want)
|
|
}
|
|
if !bytes.Equal(msg2, want) {
|
|
t.Errorf("for sighash all sig cached wrong msg %x given, want %x",
|
|
msg1,
|
|
want)
|
|
}
|
|
if !bytes.Equal(msg1, msg2) {
|
|
t.Errorf("for sighash all sig non-equivalent msgs %x and %x were "+
|
|
"returned when using a cached prefix",
|
|
msg1,
|
|
msg2)
|
|
}
|
|
|
|
// Move the index and make sure that we get a whole new hash, despite
|
|
// using the same TxOuts.
|
|
msg3, err := txscript.CalcSignatureHash(pops, txscript.SigHashAll, tx, 1,
|
|
&prefixHash)
|
|
if err != nil {
|
|
t.Fatalf("unexpected error %v", err.Error())
|
|
}
|
|
|
|
if bytes.Equal(msg1, msg3) {
|
|
t.Errorf("for sighash all sig equivalent msgs %x and %x were "+
|
|
"returned when using a cached prefix but different indices",
|
|
msg1,
|
|
msg3)
|
|
}
|
|
}
|
|
|
|
// TestIsUnspendable ensures the IsUnspendable function returns the expected
|
|
// results.
|
|
func TestIsUnspendable(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
tests := []struct {
|
|
name string
|
|
amount int64
|
|
pkScript []byte
|
|
expected bool
|
|
}{
|
|
{
|
|
// Unspendable
|
|
amount: 100,
|
|
pkScript: []byte{0x6a, 0x04, 0x74, 0x65, 0x73, 0x74},
|
|
expected: true,
|
|
},
|
|
{
|
|
// Unspendable
|
|
amount: 0,
|
|
pkScript: []byte{0x76, 0xa9, 0x14, 0x29, 0x95, 0xa0,
|
|
0xfe, 0x68, 0x43, 0xfa, 0x9b, 0x95, 0x45,
|
|
0x97, 0xf0, 0xdc, 0xa7, 0xa4, 0x4d, 0xf6,
|
|
0xfa, 0x0b, 0x5c, 0x88, 0xac},
|
|
expected: true,
|
|
},
|
|
{
|
|
// Spendable
|
|
amount: 100,
|
|
pkScript: []byte{0x76, 0xa9, 0x14, 0x29, 0x95, 0xa0,
|
|
0xfe, 0x68, 0x43, 0xfa, 0x9b, 0x95, 0x45,
|
|
0x97, 0xf0, 0xdc, 0xa7, 0xa4, 0x4d, 0xf6,
|
|
0xfa, 0x0b, 0x5c, 0x88, 0xac},
|
|
expected: false,
|
|
},
|
|
}
|
|
|
|
for i, test := range tests {
|
|
res := txscript.IsUnspendable(test.amount, test.pkScript)
|
|
if res != test.expected {
|
|
t.Errorf("TestIsUnspendable #%d failed: got %v want %v",
|
|
i, res, test.expected)
|
|
continue
|
|
}
|
|
}
|
|
}
|