154 lines
6.5 KiB
Go
154 lines
6.5 KiB
Go
// Copyright (c) 2013-2015 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
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import (
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"errors"
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"fmt"
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)
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var (
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// ErrStackShortScript is returned if the script has an opcode that is
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// too long for the length of the script.
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ErrStackShortScript = errors.New("execute past end of script")
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// ErrStackLongScript is returned if the script has an opcode that is
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// too long for the length of the script.
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ErrStackLongScript = errors.New("script is longer than maximum allowed")
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// ErrStackUnderflow is returned if an opcode requires more items on the
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// stack than is present.f
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ErrStackUnderflow = errors.New("stack underflow")
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// ErrStackInvalidArgs is returned if the argument for an opcode is out
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// of acceptable range.
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ErrStackInvalidArgs = errors.New("invalid argument")
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// ErrStackOpDisabled is returned when a disabled opcode is encountered
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// in the script.
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ErrStackOpDisabled = errors.New("disabled opcode")
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// ErrStackVerifyFailed is returned when one of the OP_VERIFY or
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// OP_*VERIFY instructions is executed and the conditions fails.
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ErrStackVerifyFailed = errors.New("verify failed")
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// ErrStackNumberTooBig is returned when the argument for an opcode that
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// should be an offset is obviously far too large.
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ErrStackNumberTooBig = errors.New("number too big")
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// ErrStackInvalidOpcode is returned when an opcode marked as invalid or
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// a completely undefined opcode is encountered.
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ErrStackInvalidOpcode = errors.New("invalid opcode")
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// ErrStackReservedOpcode is returned when an opcode marked as reserved
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// is encountered.
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ErrStackReservedOpcode = errors.New("reserved opcode")
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// ErrStackEarlyReturn is returned when OP_RETURN is executed in the
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// script.
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ErrStackEarlyReturn = errors.New("script returned early")
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// ErrStackNoIf is returned if an OP_ELSE or OP_ENDIF is encountered
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// without first having an OP_IF or OP_NOTIF in the script.
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ErrStackNoIf = errors.New("OP_ELSE or OP_ENDIF with no matching OP_IF")
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// ErrStackMissingEndif is returned if the end of a script is reached
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// without and OP_ENDIF to correspond to a conditional expression.
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ErrStackMissingEndif = fmt.Errorf("execute fail, in conditional execution")
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// ErrStackTooManyPubKeys is returned if an OP_CHECKMULTISIG is
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// encountered with more than MaxPubKeysPerMultiSig pubkeys present.
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ErrStackTooManyPubKeys = errors.New("invalid pubkey count in OP_CHECKMULTISIG")
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// ErrStackTooManyOperations is returned if a script has more than
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// MaxOpsPerScript opcodes that do not push data.
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ErrStackTooManyOperations = errors.New("too many operations in script")
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// ErrStackElementTooBig is returned if the size of an element to be
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// pushed to the stack is over MaxScriptElementSize.
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ErrStackElementTooBig = errors.New("element in script too large")
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// ErrStackUnknownAddress is returned when ScriptToAddrHash does not
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// recognise the pattern of the script and thus can not find the address
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// for payment.
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ErrStackUnknownAddress = errors.New("non-recognised address")
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// ErrStackScriptFailed is returned when at the end of a script the
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// boolean on top of the stack is false signifying that the script has
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// failed.
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ErrStackScriptFailed = errors.New("execute fail, fail on stack")
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// ErrStackScriptUnfinished is returned when CheckErrorCondition is
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// called on a script that has not finished executing.
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ErrStackScriptUnfinished = errors.New("error check when script unfinished")
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// ErrStackEmptyStack is returned when the stack is empty at the end of
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// execution. Normal operation requires that a boolean is on top of the
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// stack when the scripts have finished executing.
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ErrStackEmptyStack = errors.New("stack empty at end of execution")
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// ErrStackP2SHNonPushOnly is returned when a Pay-to-Script-Hash
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// transaction is encountered and the ScriptSig does operations other
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// than push data (in violation of bip16).
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ErrStackP2SHNonPushOnly = errors.New("pay to script hash with non " +
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"pushonly input")
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// ErrStackInvalidParseType is an internal error returned from
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// ScriptToAddrHash ony if the internal data tables are wrong.
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ErrStackInvalidParseType = errors.New("internal error: invalid parsetype found")
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// ErrStackInvalidAddrOffset is an internal error returned from
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// ScriptToAddrHash ony if the internal data tables are wrong.
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ErrStackInvalidAddrOffset = errors.New("internal error: invalid offset found")
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// ErrStackInvalidIndex is returned when an out-of-bounds index was
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// passed to a function.
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ErrStackInvalidIndex = errors.New("invalid script index")
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// ErrStackNonPushOnly is returned when ScriptInfo is called with a
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// pkScript that peforms operations other that pushing data to the stack.
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ErrStackNonPushOnly = errors.New("SigScript is non pushonly")
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// ErrStackOverflow is returned when stack and altstack combined depth
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// is over the limit.
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ErrStackOverflow = errors.New("stack overflow")
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// ErrStackInvalidLowSSignature is returned when the ScriptVerifyLowS
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// flag is set and the script contains any signatures whose S values
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// are higher than the half order.
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ErrStackInvalidLowSSignature = errors.New("invalid low s signature")
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// ErrStackInvalidPubKey is returned when the ScriptVerifyScriptEncoding
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// flag is set and the script contains invalid pubkeys.
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ErrStackInvalidPubKey = errors.New("invalid strict pubkey")
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// ErrStackCleanStack is returned when the ScriptVerifyCleanStack flag
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// is set and after evalution the stack does not contain only one element,
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// which also must be true if interpreted as a boolean.
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ErrStackCleanStack = errors.New("stack is not clean")
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// ErrStackMinimalData is returned when the ScriptVerifyMinimalData flag
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// is set and the script contains push operations that do not use
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// the minimal opcode required.
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ErrStackMinimalData = errors.New("non-minimally encoded script number")
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)
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var (
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// ErrInvalidFlags is returned when the passed flags to NewScript
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// contain an invalid combination.
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ErrInvalidFlags = errors.New("invalid flags combination")
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// ErrInvalidIndex is returned when the passed input index for the
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// provided transaction is out of range.
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ErrInvalidIndex = errors.New("invalid input index")
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// ErrUnsupportedAddress is returned when a concrete type that
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// implements a btcutil.Address is not a supported type.
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ErrUnsupportedAddress = errors.New("unsupported address type")
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// ErrBadNumRequired is returned from MultiSigScript when nrequired is
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// larger than the number of provided public keys.
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ErrBadNumRequired = errors.New("more signatures required than keys present")
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)
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