txscript

package

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Versions in this module

v0

v0.22.0

Apr 23, 2026

Changes in this version

+ const MaxFunctionIdentifierLength

+ const OP_BEGIN

+ const OP_DEFINE

+ const OP_INVOKE

+ const OP_UNTIL

+ const OpCondLoopBase

type ErrorCode

+ const ErrFunctionAlreadyDefined

+ const ErrInvalidFunctionIdentifier

+ const ErrUndefinedFunction

type ScriptFlags

+ const ScriptAllowMay2026

v0.21.1

May 19, 2025

Changes in this version

+ const HashBlockSize

+ const HashCostPenaltyForStdTxns

+ const HashIterBonusForNonStandardTxns

+ const InputScriptSizeFixedCredit

+ const MaxConditionalStackDepth

+ const MaxSatoshi

+ const MaxScriptElementSizeLegacy

+ const MaxScriptElementSizeUpgrade11

+ const MaxTxVersion

+ const MinTxVersion

+ const OpCostBudgetPerInputByte

+ const OpcodeBaseCost

+ const SatoshiPerBitcoinCash

+ const SigCheckCostFactor

+ func GetDigestIterationCount(messageLength int, isDouble bool) int

+ func GetHashIterationCostFactor(isStandard bool) int

+ func GetInputHashIterationsLimit(scriptSigSize int, isStandard bool) int

+ func GetInputOperationCostLimit(scriptSigSize int) int

+ func ReadGzFile(filename string) ([]byte, error)

type Engine

+ func (vm *Engine) GetMetrics() *ScriptExecutionMetrics

type ErrorCode

+ const ErrConditionalStackDepth

+ const ErrOpCost

+ const ErrTooManyHashIters

+ type ScriptExecutionMetrics struct

+ func NewScriptExecutionMetrics(scriptSigSize int, isStandard bool) *ScriptExecutionMetrics

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) AddHashCost(messageLength int, isDouble bool)

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) AddNumSigChecks(numScigChecks int)

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) AddOPCost(cost int)

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) GetCompositeOPCost(isStandard bool) int64

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) GetHashDigestIterations() int64

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) GetMaxDigestIterationLimit() int64

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) GetMaxOpCostLimit() int64

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) IsOverHashIterationsLimit(isStandard bool) bool

+ func (scriptExecutionMetrics *ScriptExecutionMetrics) IsOverOpCostLimit(isStandard bool) bool

type ScriptFlags

+ const ScriptAllowMay2025

+ const ScriptAllowMay2025StandardOnly

v0.20.0

Jan 15, 2025

Changes in this version

+ const OP_OUTPUTTOKENAMOUNT

+ const OP_OUTPUTTOKENCATEGORY

+ const OP_OUTPUTTOKENCOMMITMENT

+ const OP_UTXOTOKENAMOUNT

+ const OP_UTXOTOKENCATEGORY

+ const OP_UTXOTOKENCOMMITMENT

+ const SPECIAL_TOKEN_PREFIX

+ func IsPayToScriptHash32(script []byte) bool

type ScriptClass

+ const ScriptHash32Ty

type ScriptFlags

+ const ScriptAllowCashTokens

type SigHashType

+ const SigHashUTXO

type TxSigHashes

+ HashUTXOS chainhash.Hash

+ func (txSighashes *TxSigHashes) AddTxSigHashUtxoFromUtxoCache(tx *wire.MsgTx, utxoCache *UtxoCache)

v0.20.0-rc2

Dec 21, 2024

v0.20.0-rc1

Dec 20, 2024

v0.19.0

May 5, 2022

Changes in this version

+ const OP_ACTIVEBYTECODE

+ const OP_INPUTBYTECODE

+ const OP_INPUTINDEX

+ const OP_INPUTSEQUENCENUMBER

+ const OP_OUTPOINTINDEX

+ const OP_OUTPOINTTXHASH

+ const OP_OUTPUTBYTECODE

+ const OP_OUTPUTVALUE

+ const OP_TXINPUTCOUNT

+ const OP_TXLOCKTIME

+ const OP_TXOUTPUTCOUNT

+ const OP_TXVERSION

+ const OP_UTXOBYTECODE

+ const OP_UTXOVALUE

type ErrorCode

+ const ErrIntegerOverflow

type ScriptFlags

+ const ScriptVerify64BitIntegers

+ const ScriptVerifyNativeIntrospection

+ type UtxoCache struct

+ func NewUtxoCache() *UtxoCache

+ func (u *UtxoCache) AddEntry(i int, output wire.TxOut)

+ func (u *UtxoCache) GetEntry(i int) (wire.TxOut, error)

v0.18.1

May 24, 2021

v0.18.0

May 13, 2021

v0.17.1

Dec 9, 2020

v0.17.0

Oct 24, 2020

v0.16.5

Jul 24, 2020

v0.16.4

Jul 6, 2020

v0.16.3

Jun 10, 2020

v0.16.2

May 18, 2020

v0.16.1

May 15, 2020

v0.16.0

May 6, 2020

Changes in this version

+ const OP_REVERSEBYTES

type Engine

+ func (vm *Engine) SigChecks() int

type ErrorCode

+ const ErrInputSigChecks

type ScriptFlags

+ const ScriptReportSigChecks

+ const ScriptVerifyInputSigChecks

+ const ScriptVerifyReverseBytes

v0.15.2

Dec 1, 2019

v0.15.1

Nov 17, 2019

v0.15.0

Oct 21, 2019

Changes in this version

type ErrorCode

+ const ErrInvalidBitCount

+ const ErrInvalidDummy

type ScriptFlags

+ const ScriptVerifySchnorrMultisig

v0.14.7

Aug 20, 2019

v0.14.6

Jun 16, 2019

Changes in this version

+ func ExtractRedeemScript(script []byte) ([]byte, error)

type Engine

+ func (vm *Engine) Clone() *Engine

+ func (vm *Engine) IsBranchExecuting() bool

type ErrorCode

+ const ErrMinimalIf

type ScriptFlags

+ const ScriptVerifyCompressedPubkey

+ const ScriptVerifyMinimalIf

v0.14.4

May 26, 2019

Changes in this version

+ const LockTimeThreshold

+ const MaxDataCarrierSize

+ const MaxOpsPerScript

+ const MaxPubKeysPerMultiSig

+ const MaxScriptElementSize

+ const MaxScriptSize

+ const MaxStackSize

+ const OP_0

+ const OP_0NOTEQUAL

+ const OP_1

+ const OP_10

+ const OP_11

+ const OP_12

+ const OP_13

+ const OP_14

+ const OP_15

+ const OP_16

+ const OP_1ADD

+ const OP_1NEGATE

+ const OP_1SUB

+ const OP_2

+ const OP_2DIV

+ const OP_2DROP

+ const OP_2DUP

+ const OP_2MUL

+ const OP_2OVER

+ const OP_2ROT

+ const OP_2SWAP

+ const OP_3

+ const OP_3DUP

+ const OP_4

+ const OP_5

+ const OP_6

+ const OP_7

+ const OP_8

+ const OP_9

+ const OP_ABS

+ const OP_ADD

+ const OP_AND

+ const OP_BIN2NUM

+ const OP_BOOLAND

+ const OP_BOOLOR

+ const OP_CAT

+ const OP_CHECKDATASIG

+ const OP_CHECKDATASIGVERIFY

+ const OP_CHECKLOCKTIMEVERIFY

+ const OP_CHECKMULTISIG

+ const OP_CHECKMULTISIGVERIFY

+ const OP_CHECKSEQUENCEVERIFY

+ const OP_CHECKSIG

+ const OP_CHECKSIGVERIFY

+ const OP_CODESEPARATOR

+ const OP_DATA_1

+ const OP_DATA_10

+ const OP_DATA_11

+ const OP_DATA_12

+ const OP_DATA_13

+ const OP_DATA_14

+ const OP_DATA_15

+ const OP_DATA_16

+ const OP_DATA_17

+ const OP_DATA_18

+ const OP_DATA_19

+ const OP_DATA_2

+ const OP_DATA_20

+ const OP_DATA_21

+ const OP_DATA_22

+ const OP_DATA_23

+ const OP_DATA_24

+ const OP_DATA_25

+ const OP_DATA_26

+ const OP_DATA_27

+ const OP_DATA_28

+ const OP_DATA_29

+ const OP_DATA_3

+ const OP_DATA_30

+ const OP_DATA_31

+ const OP_DATA_32

+ const OP_DATA_33

+ const OP_DATA_34

+ const OP_DATA_35

+ const OP_DATA_36

+ const OP_DATA_37

+ const OP_DATA_38

+ const OP_DATA_39

+ const OP_DATA_4

+ const OP_DATA_40

+ const OP_DATA_41

+ const OP_DATA_42

+ const OP_DATA_43

+ const OP_DATA_44

+ const OP_DATA_45

+ const OP_DATA_46

+ const OP_DATA_47

+ const OP_DATA_48

+ const OP_DATA_49

+ const OP_DATA_5

+ const OP_DATA_50

+ const OP_DATA_51

+ const OP_DATA_52

+ const OP_DATA_53

+ const OP_DATA_54

+ const OP_DATA_55

+ const OP_DATA_56

+ const OP_DATA_57

+ const OP_DATA_58

+ const OP_DATA_59

+ const OP_DATA_6

+ const OP_DATA_60

+ const OP_DATA_61

+ const OP_DATA_62

+ const OP_DATA_63

+ const OP_DATA_64

+ const OP_DATA_65

+ const OP_DATA_66

+ const OP_DATA_67

+ const OP_DATA_68

+ const OP_DATA_69

+ const OP_DATA_7

+ const OP_DATA_70

+ const OP_DATA_71

+ const OP_DATA_72

+ const OP_DATA_73

+ const OP_DATA_74

+ const OP_DATA_75

+ const OP_DATA_8

+ const OP_DATA_9

+ const OP_DEPTH

+ const OP_DIV

+ const OP_DROP

+ const OP_DUP

+ const OP_ELSE

+ const OP_ENDIF

+ const OP_EQUAL

+ const OP_EQUALVERIFY

+ const OP_FALSE

+ const OP_FROMALTSTACK

+ const OP_GREATERTHAN

+ const OP_GREATERTHANOREQUAL

+ const OP_HASH160

+ const OP_HASH256

+ const OP_IF

+ const OP_IFDUP

+ const OP_INVALIDOPCODE

+ const OP_INVERT

+ const OP_LESSTHAN

+ const OP_LESSTHANOREQUAL

+ const OP_LSHIFT

+ const OP_MAX

+ const OP_MIN

+ const OP_MOD

+ const OP_MUL

+ const OP_NEGATE

+ const OP_NIP

+ const OP_NOP

+ const OP_NOP1

+ const OP_NOP10

+ const OP_NOP2

+ const OP_NOP3

+ const OP_NOP4

+ const OP_NOP5

+ const OP_NOP6

+ const OP_NOP7

+ const OP_NOP8

+ const OP_NOP9

+ const OP_NOT

+ const OP_NOTIF

+ const OP_NUM2BIN

+ const OP_NUMEQUAL

+ const OP_NUMEQUALVERIFY

+ const OP_NUMNOTEQUAL

+ const OP_OR

+ const OP_OVER

+ const OP_PICK

+ const OP_PUBKEY

+ const OP_PUBKEYHASH

+ const OP_PUBKEYS

+ const OP_PUSHDATA1

+ const OP_PUSHDATA2

+ const OP_PUSHDATA4

+ const OP_RESERVED

+ const OP_RESERVED1

+ const OP_RESERVED2

+ const OP_RETURN

+ const OP_RIPEMD160

+ const OP_ROLL

+ const OP_ROT

+ const OP_RSHIFT

+ const OP_SHA1

+ const OP_SHA256

+ const OP_SIZE

+ const OP_SMALLINTEGER

+ const OP_SPLIT

+ const OP_SUB

+ const OP_SWAP

+ const OP_TOALTSTACK

+ const OP_TRUE

+ const OP_TUCK

+ const OP_UNKNOWN188

+ const OP_UNKNOWN189

+ const OP_UNKNOWN190

+ const OP_UNKNOWN191

+ const OP_UNKNOWN192

+ const OP_UNKNOWN193

+ const OP_UNKNOWN194

+ const OP_UNKNOWN195

+ const OP_UNKNOWN196

+ const OP_UNKNOWN197

+ const OP_UNKNOWN198

+ const OP_UNKNOWN199

+ const OP_UNKNOWN200

+ const OP_UNKNOWN201

+ const OP_UNKNOWN202

+ const OP_UNKNOWN203

+ const OP_UNKNOWN204

+ const OP_UNKNOWN205

+ const OP_UNKNOWN206

+ const OP_UNKNOWN207

+ const OP_UNKNOWN208

+ const OP_UNKNOWN209

+ const OP_UNKNOWN210

+ const OP_UNKNOWN211

+ const OP_UNKNOWN212

+ const OP_UNKNOWN213

+ const OP_UNKNOWN214

+ const OP_UNKNOWN215

+ const OP_UNKNOWN216

+ const OP_UNKNOWN217

+ const OP_UNKNOWN218

+ const OP_UNKNOWN219

+ const OP_UNKNOWN220

+ const OP_UNKNOWN221

+ const OP_UNKNOWN222

+ const OP_UNKNOWN223

+ const OP_UNKNOWN224

+ const OP_UNKNOWN225

+ const OP_UNKNOWN226

+ const OP_UNKNOWN227

+ const OP_UNKNOWN228

+ const OP_UNKNOWN229

+ const OP_UNKNOWN230

+ const OP_UNKNOWN231

+ const OP_UNKNOWN232

+ const OP_UNKNOWN233

+ const OP_UNKNOWN234

+ const OP_UNKNOWN235

+ const OP_UNKNOWN236

+ const OP_UNKNOWN237

+ const OP_UNKNOWN238

+ const OP_UNKNOWN239

+ const OP_UNKNOWN240

+ const OP_UNKNOWN241

+ const OP_UNKNOWN242

+ const OP_UNKNOWN243

+ const OP_UNKNOWN244

+ const OP_UNKNOWN245

+ const OP_UNKNOWN246

+ const OP_UNKNOWN247

+ const OP_UNKNOWN248

+ const OP_UNKNOWN249

+ const OP_UNKNOWN252

+ const OP_VER

+ const OP_VERIF

+ const OP_VERIFY

+ const OP_VERNOTIF

+ const OP_WITHIN

+ const OP_XOR

+ const OpCondFalse

+ const OpCondSkip

+ const OpCondTrue

+ const StandardVerifyFlags

+ var Bip16Activation = time.Unix(1333238400, 0)

+ var ErrUnsupportedScriptType = errors.New("unsupported script type")

+ var OpcodeByName = make(map[string]byte)

+ func CalcMultiSigStats(script []byte) (int, int, error)

+ func CalcSignatureHash(script []byte, sigHashes *TxSigHashes, hType SigHashType, tx *wire.MsgTx, ...) ([]byte, error)

+ func DisableLog()

+ func DisasmString(buf []byte) (string, error)

+ func ExtractDataElements(script []byte) ([][]byte, error)

+ func GetPreciseSigOpCount(scriptSig, scriptPubKey []byte, scriptFlags ScriptFlags) int

+ func GetSigOpCount(script []byte, scriptFlags ScriptFlags) int

+ func IsErrorCode(err error, c ErrorCode) bool

+ func IsPayToScriptHash(script []byte) bool

+ func IsPushOnlyScript(script []byte) bool

+ func IsUnspendable(pkScript []byte) bool

+ func LegacySignatureScript(tx *wire.MsgTx, idx int, subscript []byte, hashType SigHashType, ...) ([]byte, error)

+ func LegacyTxInSignature(tx *wire.MsgTx, idx int, subScript []byte, hashType SigHashType, ...) ([]byte, error)

+ func MultiSigScript(pubkeys []*bchutil.AddressPubKey, nrequired int) ([]byte, error)

+ func NullDataScript(data []byte) ([]byte, error)

+ func PayToAddrScript(addr bchutil.Address) ([]byte, error)

+ func PushedData(script []byte) ([][]byte, error)

+ func RawTxInECDSASignature(tx *wire.MsgTx, idx int, subScript []byte, hashType SigHashType, ...) ([]byte, error)

+ func RawTxInSchnorrSignature(tx *wire.MsgTx, idx int, subScript []byte, hashType SigHashType, ...) ([]byte, error)

+ func SignTxOutput(chainParams *chaincfg.Params, tx *wire.MsgTx, idx int, amt int64, ...) ([]byte, error)

+ func SignatureScript(tx *wire.MsgTx, idx int, amt int64, subscript []byte, hashType SigHashType, ...) ([]byte, error)

+ func UseLogger(logger bchlog.Logger)

+ type AtomicSwapDataPushes struct

+ LockTime int64

+ RecipientHash160 [20]byte

+ RefundHash160 [20]byte

+ SecretHash [32]byte

+ SecretSize int64

+ func ExtractAtomicSwapDataPushes(version uint16, pkScript []byte) (*AtomicSwapDataPushes, error)

+ type Engine struct

+ func NewEngine(scriptPubKey []byte, tx *wire.MsgTx, txIdx int, flags ScriptFlags, ...) (*Engine, error)

+ func (vm *Engine) CheckErrorCondition(finalScript bool) error

+ func (vm *Engine) DisasmPC() (string, error)

+ func (vm *Engine) DisasmScript(idx int) (string, error)

+ func (vm *Engine) Execute() (err error)

+ func (vm *Engine) GetAltStack() [][]byte

+ func (vm *Engine) GetStack() [][]byte

+ func (vm *Engine) SetAltStack(data [][]byte)

+ func (vm *Engine) SetStack(data [][]byte)

+ func (vm *Engine) Step() (done bool, err error)

+ type ErrScriptNotCanonical string

+ func (e ErrScriptNotCanonical) Error() string

+ type Error struct

+ Description string

+ ErrorCode ErrorCode

+ func (e Error) Error() string

+ type ErrorCode int

+ const ErrCheckDataSigVerify

+ const ErrCheckMultiSigVerify

+ const ErrCheckSigVerify

+ const ErrCleanStack

+ const ErrDisabledOpcode

+ const ErrDiscourageUpgradableNOPs

+ const ErrEarlyReturn

+ const ErrElementTooBig

+ const ErrEmptyStack

+ const ErrEqualVerify

+ const ErrEvalFalse

+ const ErrInternal

+ const ErrInvalidFlags

+ const ErrInvalidIndex

+ const ErrInvalidInputLength

+ const ErrInvalidProgramCounter

+ const ErrInvalidPubKeyCount

+ const ErrInvalidSigHashType

+ const ErrInvalidSignatureCount

+ const ErrInvalidStackOperation

+ const ErrMalformedPush

+ const ErrMinimalData

+ const ErrNegativeLockTime

+ const ErrNotMultisigScript

+ const ErrNotPushOnly

+ const ErrNullFail

+ const ErrNumEqualVerify

+ const ErrNumberTooBig

+ const ErrNumberTooSmall

+ const ErrPubKeyType

+ const ErrReservedOpcode

+ const ErrScriptTooBig

+ const ErrScriptUnfinished

+ const ErrSigHighS

+ const ErrSigInvalidDataLen

+ const ErrSigInvalidRIntID

+ const ErrSigInvalidSIntID

+ const ErrSigInvalidSLen

+ const ErrSigInvalidSeqID

+ const ErrSigMissingSLen

+ const ErrSigMissingSTypeID

+ const ErrSigNegativeR

+ const ErrSigNegativeS

+ const ErrSigNullDummy

+ const ErrSigTooLong

+ const ErrSigTooMuchRPadding

+ const ErrSigTooMuchSPadding

+ const ErrSigTooShort

+ const ErrSigZeroRLen

+ const ErrSigZeroSLen

+ const ErrStackOverflow

+ const ErrTooManyOperations

+ const ErrTooManyRequiredSigs

+ const ErrTooMuchNullData

+ const ErrUnbalancedConditional

+ const ErrUnsatisfiedLockTime

+ const ErrUnsupportedAddress

+ const ErrVerify

+ func (e ErrorCode) String() string

+ type HashCache struct

+ func NewHashCache(maxSize uint) *HashCache

+ func (h *HashCache) AddSigHashes(tx *wire.MsgTx)

+ func (h *HashCache) ContainsHashes(txid *chainhash.Hash) bool

+ func (h *HashCache) GetSigHashes(txid *chainhash.Hash) (*TxSigHashes, bool)

+ func (h *HashCache) PurgeSigHashes(txid *chainhash.Hash)

+ type KeyClosure func(bchutil.Address) (*bchec.PrivateKey, bool, error)

+ func (kc KeyClosure) GetKey(address bchutil.Address) (*bchec.PrivateKey, bool, error)

+ type KeyDB interface

+ GetKey func(bchutil.Address) (*bchec.PrivateKey, bool, error)

+ type PkScript struct

+ func ComputePkScript(sigScript []byte) (PkScript, error)

+ func ParsePkScript(pkScript []byte) (PkScript, error)

+ func (s PkScript) Address(chainParams *chaincfg.Params) (bchutil.Address, error)

+ func (s PkScript) Class() ScriptClass

+ func (s PkScript) Script() []byte

+ func (s PkScript) String() string

+ type ScriptBuilder struct

+ func NewScriptBuilder() *ScriptBuilder

+ func (b *ScriptBuilder) AddData(data []byte) *ScriptBuilder

+ func (b *ScriptBuilder) AddFullData(data []byte) *ScriptBuilder

+ func (b *ScriptBuilder) AddInt64(val int64) *ScriptBuilder

+ func (b *ScriptBuilder) AddOp(opcode byte) *ScriptBuilder

+ func (b *ScriptBuilder) AddOps(opcodes []byte) *ScriptBuilder

+ func (b *ScriptBuilder) Reset() *ScriptBuilder

+ func (b *ScriptBuilder) Script() ([]byte, error)

+ type ScriptClass byte

+ const MultiSigTy

+ const NonStandardTy

+ const NullDataTy

+ const PubKeyHashTy

+ const PubKeyTy

+ const ScriptHashTy

+ func ExtractPkScriptAddrs(pkScript []byte, chainParams *chaincfg.Params) (ScriptClass, []bchutil.Address, int, error)

+ func GetScriptClass(script []byte) ScriptClass

+ func (t ScriptClass) String() string

+ type ScriptClosure func(bchutil.Address) ([]byte, error)

+ func (sc ScriptClosure) GetScript(address bchutil.Address) ([]byte, error)

+ type ScriptDB interface

+ GetScript func(bchutil.Address) ([]byte, error)

+ type ScriptFlags uint32

+ const ScriptBip16

+ const ScriptDiscourageUpgradableNops

+ const ScriptStrictMultiSig

+ const ScriptVerifyAllowSegwitRecovery

+ const ScriptVerifyBip143SigHash

+ const ScriptVerifyCheckDataSig

+ const ScriptVerifyCheckLockTimeVerify

+ const ScriptVerifyCheckSequenceVerify

+ const ScriptVerifyCleanStack

+ const ScriptVerifyDERSignatures

+ const ScriptVerifyLowS

+ const ScriptVerifyMinimalData

+ const ScriptVerifyNullFail

+ const ScriptVerifySchnorr

+ const ScriptVerifySigPushOnly

+ const ScriptVerifyStrictEncoding

+ func (scriptFlags ScriptFlags) HasFlag(flag ScriptFlags) bool

+ type ScriptInfo struct

+ ExpectedInputs int

+ NumInputs int

+ PkScriptClass ScriptClass

+ SigOps int

+ func CalcScriptInfo(sigScript, pkScript []byte, scriptFlags ScriptFlags) (*ScriptInfo, error)

+ type SigCache struct

+ func NewSigCache(maxEntries uint) *SigCache

+ func (s *SigCache) Add(sigHash chainhash.Hash, sig *bchec.Signature, pubKey *bchec.PublicKey)

+ func (s *SigCache) Exists(sigHash chainhash.Hash, sig *bchec.Signature, pubKey *bchec.PublicKey) bool

+ type SigHashType uint32

+ const SigHashAll

+ const SigHashAnyOneCanPay

+ const SigHashForkID

+ const SigHashNone

+ const SigHashOld

+ const SigHashSingle

+ type TxSigHashes struct

+ HashOutputs chainhash.Hash

+ HashPrevOuts chainhash.Hash

+ HashSequence chainhash.Hash

+ func NewTxSigHashes(tx *wire.MsgTx) *TxSigHashes

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