mirror of
https://github.com/btcsuite/btcd.git
synced 2024-11-19 18:00:11 +01:00
669 lines
17 KiB
Go
669 lines
17 KiB
Go
// Copyright (c) 2013-2016 The btcsuite 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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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"strconv"
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"strings"
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"testing"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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. "github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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)
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// testName returns a descriptive test name for the given reference test data.
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func testName(test []string) (string, error) {
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var name string
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if len(test) < 3 || len(test) > 4 {
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return name, fmt.Errorf("invalid test length %d", len(test))
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}
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if len(test) == 4 {
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name = fmt.Sprintf("test (%s)", test[3])
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} else {
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name = fmt.Sprintf("test ([%s, %s, %s])", test[0], test[1],
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test[2])
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}
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return name, nil
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}
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// parse hex string into a []byte.
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func parseHex(tok string) ([]byte, error) {
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if !strings.HasPrefix(tok, "0x") {
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return nil, errors.New("not a hex number")
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}
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return hex.DecodeString(tok[2:])
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}
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// shortFormOps holds a map of opcode names to values for use in short form
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// parsing. It is declared here so it only needs to be created once.
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var shortFormOps map[string]byte
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// parseShortForm parses a string as as used in the Bitcoin Core reference tests
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// into the script it came from.
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//
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// The format used for these tests is pretty simple if ad-hoc:
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// - Opcodes other than the push opcodes and unknown are present as
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// either OP_NAME or just NAME
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// - Plain numbers are made into push operations
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// - Numbers beginning with 0x are inserted into the []byte as-is (so
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// 0x14 is OP_DATA_20)
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// - Single quoted strings are pushed as data
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// - Anything else is an error
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func parseShortForm(script string) ([]byte, error) {
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// Only create the short form opcode map once.
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if shortFormOps == nil {
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ops := make(map[string]byte)
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for opcodeName, opcodeValue := range OpcodeByName {
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if strings.Contains(opcodeName, "OP_UNKNOWN") {
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continue
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}
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ops[opcodeName] = opcodeValue
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// The opcodes named OP_# can't have the OP_ prefix
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// stripped or they would conflict with the plain
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// numbers. Also, since OP_FALSE and OP_TRUE are
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// aliases for the OP_0, and OP_1, respectively, they
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// have the same value, so detect those by name and
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// allow them.
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if (opcodeName == "OP_FALSE" || opcodeName == "OP_TRUE") ||
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(opcodeValue != OP_0 && (opcodeValue < OP_1 ||
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opcodeValue > OP_16)) {
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ops[strings.TrimPrefix(opcodeName, "OP_")] = opcodeValue
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}
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}
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shortFormOps = ops
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}
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// Split only does one separator so convert all \n and tab into space.
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script = strings.Replace(script, "\n", " ", -1)
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script = strings.Replace(script, "\t", " ", -1)
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tokens := strings.Split(script, " ")
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builder := NewScriptBuilder()
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for _, tok := range tokens {
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if len(tok) == 0 {
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continue
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}
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// if parses as a plain number
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if num, err := strconv.ParseInt(tok, 10, 64); err == nil {
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builder.AddInt64(num)
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continue
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} else if bts, err := parseHex(tok); err == nil {
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builder.TstConcatRawScript(bts)
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} else if len(tok) >= 2 &&
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tok[0] == '\'' && tok[len(tok)-1] == '\'' {
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builder.AddFullData([]byte(tok[1 : len(tok)-1]))
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} else if opcode, ok := shortFormOps[tok]; ok {
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builder.AddOp(opcode)
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} else {
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return nil, fmt.Errorf("bad token \"%s\"", tok)
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}
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}
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return builder.Script()
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}
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// parseScriptFlags parses the provided flags string from the format used in the
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// reference tests into ScriptFlags suitable for use in the script engine.
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func parseScriptFlags(flagStr string) (ScriptFlags, error) {
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var flags ScriptFlags
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sFlags := strings.Split(flagStr, ",")
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for _, flag := range sFlags {
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switch flag {
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case "":
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// Nothing.
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case "CHECKLOCKTIMEVERIFY":
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flags |= ScriptVerifyCheckLockTimeVerify
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case "CHECKSEQUENCEVERIFY":
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flags |= ScriptVerifyCheckSequenceVerify
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case "CLEANSTACK":
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flags |= ScriptVerifyCleanStack
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case "DERSIG":
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flags |= ScriptVerifyDERSignatures
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case "DISCOURAGE_UPGRADABLE_NOPS":
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flags |= ScriptDiscourageUpgradableNops
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case "LOW_S":
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flags |= ScriptVerifyLowS
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case "MINIMALDATA":
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flags |= ScriptVerifyMinimalData
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case "NONE":
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// Nothing.
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case "NULLDUMMY":
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flags |= ScriptStrictMultiSig
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case "P2SH":
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flags |= ScriptBip16
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case "SIGPUSHONLY":
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flags |= ScriptVerifySigPushOnly
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case "STRICTENC":
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flags |= ScriptVerifyStrictEncoding
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default:
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return flags, fmt.Errorf("invalid flag: %s", flag)
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}
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}
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return flags, nil
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}
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// createSpendTx generates a basic spending transaction given the passed
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// signature and public key scripts.
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func createSpendingTx(sigScript, pkScript []byte) *wire.MsgTx {
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coinbaseTx := wire.NewMsgTx()
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outPoint := wire.NewOutPoint(&chainhash.Hash{}, ^uint32(0))
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txIn := wire.NewTxIn(outPoint, []byte{OP_0, OP_0})
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txOut := wire.NewTxOut(0, pkScript)
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coinbaseTx.AddTxIn(txIn)
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coinbaseTx.AddTxOut(txOut)
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spendingTx := wire.NewMsgTx()
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coinbaseTxHash := coinbaseTx.TxHash()
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outPoint = wire.NewOutPoint(&coinbaseTxHash, 0)
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txIn = wire.NewTxIn(outPoint, sigScript)
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txOut = wire.NewTxOut(0, nil)
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spendingTx.AddTxIn(txIn)
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spendingTx.AddTxOut(txOut)
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return spendingTx
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}
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// TestScriptInvalidTests ensures all of the tests in script_invalid.json fail
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// as expected.
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func TestScriptInvalidTests(t *testing.T) {
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file, err := ioutil.ReadFile("data/script_invalid.json")
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if err != nil {
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t.Errorf("TestBitcoindInvalidTests: %v\n", err)
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return
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}
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var tests [][]string
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err = json.Unmarshal(file, &tests)
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if err != nil {
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t.Errorf("TestBitcoindInvalidTests couldn't Unmarshal: %v",
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err)
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return
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}
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sigCache := NewSigCache(10)
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sigCacheToggle := []bool{true, false}
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for _, useSigCache := range sigCacheToggle {
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for i, test := range tests {
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// Skip comments
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if len(test) == 1 {
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continue
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}
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name, err := testName(test)
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if err != nil {
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t.Errorf("TestBitcoindInvalidTests: invalid test #%d",
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i)
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continue
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}
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scriptSig, err := parseShortForm(test[0])
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if err != nil {
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t.Errorf("%s: can't parse scriptSig; %v", name, err)
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continue
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}
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scriptPubKey, err := parseShortForm(test[1])
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if err != nil {
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t.Errorf("%s: can't parse scriptPubkey; %v", name, err)
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continue
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}
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flags, err := parseScriptFlags(test[2])
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if err != nil {
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t.Errorf("%s: %v", name, err)
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continue
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}
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tx := createSpendingTx(scriptSig, scriptPubKey)
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var vm *Engine
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if useSigCache {
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vm, err = NewEngine(scriptPubKey, tx, 0, flags, sigCache)
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} else {
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vm, err = NewEngine(scriptPubKey, tx, 0, flags, nil)
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}
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if err == nil {
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if err := vm.Execute(); err == nil {
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t.Errorf("%s test succeeded when it "+
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"should have failed\n", name)
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}
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continue
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}
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}
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}
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}
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// TestScriptValidTests ensures all of the tests in script_valid.json pass as
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// expected.
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func TestScriptValidTests(t *testing.T) {
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file, err := ioutil.ReadFile("data/script_valid.json")
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if err != nil {
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t.Errorf("TestBitcoinValidTests: %v\n", err)
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return
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}
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var tests [][]string
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err = json.Unmarshal(file, &tests)
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if err != nil {
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t.Errorf("TestBitcoindValidTests couldn't Unmarshal: %v",
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err)
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return
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}
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sigCache := NewSigCache(10)
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sigCacheToggle := []bool{true, false}
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for _, useSigCache := range sigCacheToggle {
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for i, test := range tests {
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// Skip comments
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if len(test) == 1 {
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continue
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}
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name, err := testName(test)
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if err != nil {
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t.Errorf("TestBitcoindValidTests: invalid test #%d",
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i)
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continue
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}
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scriptSig, err := parseShortForm(test[0])
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if err != nil {
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t.Errorf("%s: can't parse scriptSig; %v", name, err)
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continue
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}
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scriptPubKey, err := parseShortForm(test[1])
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if err != nil {
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t.Errorf("%s: can't parse scriptPubkey; %v", name, err)
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continue
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}
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flags, err := parseScriptFlags(test[2])
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if err != nil {
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t.Errorf("%s: %v", name, err)
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continue
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}
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tx := createSpendingTx(scriptSig, scriptPubKey)
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var vm *Engine
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if useSigCache {
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vm, err = NewEngine(scriptPubKey, tx, 0, flags, sigCache)
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} else {
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vm, err = NewEngine(scriptPubKey, tx, 0, flags, nil)
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}
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if err != nil {
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t.Errorf("%s failed to create script: %v", name, err)
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continue
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}
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err = vm.Execute()
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if err != nil {
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t.Errorf("%s failed to execute: %v", name, err)
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continue
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}
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}
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}
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}
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// testVecF64ToUint32 properly handles conversion of float64s read from the JSON
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// test data to unsigned 32-bit integers. This is necessary because some of the
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// test data uses -1 as a shortcut to mean max uint32 and direct conversion of a
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// negative float to an unsigned int is implementation dependent and therefore
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// doesn't result in the expected value on all platforms. This function woks
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// around that limitation by converting to a 32-bit signed integer first and
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// then to a 32-bit unsigned integer which results in the expected behavior on
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// all platforms.
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func testVecF64ToUint32(f float64) uint32 {
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return uint32(int32(f))
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}
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// TestTxInvalidTests ensures all of the tests in tx_invalid.json fail as
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// expected.
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func TestTxInvalidTests(t *testing.T) {
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file, err := ioutil.ReadFile("data/tx_invalid.json")
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if err != nil {
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t.Errorf("TestTxInvalidTests: %v\n", err)
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return
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}
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var tests [][]interface{}
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err = json.Unmarshal(file, &tests)
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if err != nil {
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t.Errorf("TestTxInvalidTests couldn't Unmarshal: %v\n", err)
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return
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}
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// form is either:
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// ["this is a comment "]
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// or:
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// [[[previous hash, previous index, previous scriptPubKey]...,]
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// serializedTransaction, verifyFlags]
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testloop:
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for i, test := range tests {
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inputs, ok := test[0].([]interface{})
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if !ok {
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continue
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}
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if len(test) != 3 {
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t.Errorf("bad test (bad length) %d: %v", i, test)
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continue
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}
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serializedhex, ok := test[1].(string)
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if !ok {
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t.Errorf("bad test (arg 2 not string) %d: %v", i, test)
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continue
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}
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serializedTx, err := hex.DecodeString(serializedhex)
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if err != nil {
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t.Errorf("bad test (arg 2 not hex %v) %d: %v", err, i,
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test)
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continue
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}
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tx, err := btcutil.NewTxFromBytes(serializedTx)
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if err != nil {
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t.Errorf("bad test (arg 2 not msgtx %v) %d: %v", err,
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i, test)
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continue
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}
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verifyFlags, ok := test[2].(string)
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if !ok {
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t.Errorf("bad test (arg 3 not string) %d: %v", i, test)
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continue
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}
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flags, err := parseScriptFlags(verifyFlags)
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if err != nil {
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t.Errorf("bad test %d: %v", i, err)
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continue
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}
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prevOuts := make(map[wire.OutPoint][]byte)
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for j, iinput := range inputs {
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input, ok := iinput.([]interface{})
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if !ok {
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t.Errorf("bad test (%dth input not array)"+
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"%d: %v", j, i, test)
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continue testloop
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}
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if len(input) != 3 {
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t.Errorf("bad test (%dth input wrong length)"+
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"%d: %v", j, i, test)
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continue testloop
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}
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previoustx, ok := input[0].(string)
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if !ok {
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t.Errorf("bad test (%dth input hash not string)"+
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"%d: %v", j, i, test)
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continue testloop
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}
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prevhash, err := chainhash.NewHashFromStr(previoustx)
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if err != nil {
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t.Errorf("bad test (%dth input hash not hash %v)"+
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"%d: %v", j, err, i, test)
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continue testloop
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}
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idxf, ok := input[1].(float64)
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if !ok {
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t.Errorf("bad test (%dth input idx not number)"+
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"%d: %v", j, i, test)
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continue testloop
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}
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idx := testVecF64ToUint32(idxf)
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oscript, ok := input[2].(string)
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if !ok {
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t.Errorf("bad test (%dth input script not "+
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"string) %d: %v", j, i, test)
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continue testloop
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}
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script, err := parseShortForm(oscript)
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if err != nil {
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t.Errorf("bad test (%dth input script doesn't "+
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"parse %v) %d: %v", j, err, i, test)
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continue testloop
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}
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prevOuts[*wire.NewOutPoint(prevhash, idx)] = script
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}
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for k, txin := range tx.MsgTx().TxIn {
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pkScript, ok := prevOuts[txin.PreviousOutPoint]
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if !ok {
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t.Errorf("bad test (missing %dth input) %d:%v",
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k, i, test)
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continue testloop
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}
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// These are meant to fail, so as soon as the first
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// input fails the transaction has failed. (some of the
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// test txns have good inputs, too..
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vm, err := NewEngine(pkScript, tx.MsgTx(), k, flags, nil)
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if err != nil {
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continue testloop
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}
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err = vm.Execute()
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if err != nil {
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continue testloop
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}
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}
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t.Errorf("test (%d:%v) succeeded when should fail",
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i, test)
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}
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}
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// TestTxValidTests ensures all of the tests in tx_valid.json pass as expected.
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func TestTxValidTests(t *testing.T) {
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file, err := ioutil.ReadFile("data/tx_valid.json")
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if err != nil {
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t.Errorf("TestTxValidTests: %v\n", err)
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return
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}
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|
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var tests [][]interface{}
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err = json.Unmarshal(file, &tests)
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if err != nil {
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t.Errorf("TestTxValidTests couldn't Unmarshal: %v\n", err)
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return
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}
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|
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// form is either:
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// ["this is a comment "]
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// or:
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// [[[previous hash, previous index, previous scriptPubKey]...,]
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// serializedTransaction, verifyFlags]
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testloop:
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for i, test := range tests {
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inputs, ok := test[0].([]interface{})
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if !ok {
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continue
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}
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if len(test) != 3 {
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t.Errorf("bad test (bad length) %d: %v", i, test)
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continue
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}
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serializedhex, ok := test[1].(string)
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if !ok {
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t.Errorf("bad test (arg 2 not string) %d: %v", i, test)
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continue
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}
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serializedTx, err := hex.DecodeString(serializedhex)
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if err != nil {
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t.Errorf("bad test (arg 2 not hex %v) %d: %v", err, i,
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test)
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continue
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}
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tx, err := btcutil.NewTxFromBytes(serializedTx)
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if err != nil {
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t.Errorf("bad test (arg 2 not msgtx %v) %d: %v", err,
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i, test)
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continue
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}
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verifyFlags, ok := test[2].(string)
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if !ok {
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t.Errorf("bad test (arg 3 not string) %d: %v", i, test)
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continue
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}
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flags, err := parseScriptFlags(verifyFlags)
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if err != nil {
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t.Errorf("bad test %d: %v", i, err)
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continue
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}
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prevOuts := make(map[wire.OutPoint][]byte)
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for j, iinput := range inputs {
|
|
input, ok := iinput.([]interface{})
|
|
if !ok {
|
|
t.Errorf("bad test (%dth input not array)"+
|
|
"%d: %v", j, i, test)
|
|
continue
|
|
}
|
|
|
|
if len(input) != 3 {
|
|
t.Errorf("bad test (%dth input wrong length)"+
|
|
"%d: %v", j, i, test)
|
|
continue
|
|
}
|
|
|
|
previoustx, ok := input[0].(string)
|
|
if !ok {
|
|
t.Errorf("bad test (%dth input hash not string)"+
|
|
"%d: %v", j, i, test)
|
|
continue
|
|
}
|
|
|
|
prevhash, err := chainhash.NewHashFromStr(previoustx)
|
|
if err != nil {
|
|
t.Errorf("bad test (%dth input hash not hash %v)"+
|
|
"%d: %v", j, err, i, test)
|
|
continue
|
|
}
|
|
|
|
idxf, ok := input[1].(float64)
|
|
if !ok {
|
|
t.Errorf("bad test (%dth input idx not number)"+
|
|
"%d: %v", j, i, test)
|
|
continue
|
|
}
|
|
idx := testVecF64ToUint32(idxf)
|
|
|
|
oscript, ok := input[2].(string)
|
|
if !ok {
|
|
t.Errorf("bad test (%dth input script not "+
|
|
"string) %d: %v", j, i, test)
|
|
continue
|
|
}
|
|
|
|
script, err := parseShortForm(oscript)
|
|
if err != nil {
|
|
t.Errorf("bad test (%dth input script doesn't "+
|
|
"parse %v) %d: %v", j, err, i, test)
|
|
continue
|
|
}
|
|
|
|
prevOuts[*wire.NewOutPoint(prevhash, idx)] = script
|
|
}
|
|
|
|
for k, txin := range tx.MsgTx().TxIn {
|
|
pkScript, ok := prevOuts[txin.PreviousOutPoint]
|
|
if !ok {
|
|
t.Errorf("bad test (missing %dth input) %d:%v",
|
|
k, i, test)
|
|
continue testloop
|
|
}
|
|
vm, err := NewEngine(pkScript, tx.MsgTx(), k, flags, nil)
|
|
if err != nil {
|
|
t.Errorf("test (%d:%v:%d) failed to create "+
|
|
"script: %v", i, test, k, err)
|
|
continue
|
|
}
|
|
|
|
err = vm.Execute()
|
|
if err != nil {
|
|
t.Errorf("test (%d:%v:%d) failed to execute: "+
|
|
"%v", i, test, k, err)
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestCalcSignatureHash runs the Bitcoin Core signature hash calculation tests
|
|
// in sighash.json.
|
|
// https://github.com/bitcoin/bitcoin/blob/master/src/test/data/sighash.json
|
|
func TestCalcSignatureHash(t *testing.T) {
|
|
file, err := ioutil.ReadFile("data/sighash.json")
|
|
if err != nil {
|
|
t.Errorf("TestCalcSignatureHash: %v\n", err)
|
|
return
|
|
}
|
|
|
|
var tests [][]interface{}
|
|
err = json.Unmarshal(file, &tests)
|
|
if err != nil {
|
|
t.Errorf("TestCalcSignatureHash couldn't Unmarshal: %v\n",
|
|
err)
|
|
return
|
|
}
|
|
|
|
for i, test := range tests {
|
|
if i == 0 {
|
|
// Skip first line -- contains comments only.
|
|
continue
|
|
}
|
|
if len(test) != 5 {
|
|
t.Fatalf("TestCalcSignatureHash: Test #%d has "+
|
|
"wrong length.", i)
|
|
}
|
|
tx := wire.NewMsgTx()
|
|
rawTx, _ := hex.DecodeString(test[0].(string))
|
|
err := tx.Deserialize(bytes.NewReader(rawTx))
|
|
if err != nil {
|
|
t.Errorf("TestCalcSignatureHash failed test #%d: "+
|
|
"Failed to parse transaction: %v", i, err)
|
|
continue
|
|
}
|
|
|
|
subScript, _ := hex.DecodeString(test[1].(string))
|
|
parsedScript, err := TstParseScript(subScript)
|
|
if err != nil {
|
|
t.Errorf("TestCalcSignatureHash failed test #%d: "+
|
|
"Failed to parse sub-script: %v", i, err)
|
|
continue
|
|
}
|
|
|
|
hashType := SigHashType(testVecF64ToUint32(test[3].(float64)))
|
|
hash := TstCalcSignatureHash(parsedScript, hashType, tx,
|
|
int(test[2].(float64)))
|
|
|
|
expectedHash, _ := chainhash.NewHashFromStr(test[4].(string))
|
|
if !bytes.Equal(hash, expectedHash[:]) {
|
|
t.Errorf("TestCalcSignatureHash failed test #%d: "+
|
|
"Signature hash mismatch.", i)
|
|
}
|
|
}
|
|
}
|