299 lines
11 KiB
Go
299 lines
11 KiB
Go
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// Copyright (c) 2014-2016 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 blockchain
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import (
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"fmt"
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)
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// DeploymentError identifies an error that indicates a deployment ID was
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// specified that does not exist.
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type DeploymentError uint32
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// Error returns the assertion error as a human-readable string and satisfies
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// the error interface.
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func (e DeploymentError) Error() string {
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return fmt.Sprintf("deployment ID %d does not exist", uint32(e))
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}
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// AssertError identifies an error that indicates an internal code consistency
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// issue and should be treated as a critical and unrecoverable error.
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type AssertError string
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// Error returns the assertion error as a human-readable string and satisfies
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// the error interface.
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func (e AssertError) Error() string {
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return "assertion failed: " + string(e)
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}
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// ErrorCode identifies a kind of error.
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type ErrorCode int
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// These constants are used to identify a specific RuleError.
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const (
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// ErrDuplicateBlock indicates a block with the same hash already
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// exists.
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ErrDuplicateBlock ErrorCode = iota
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// ErrBlockTooBig indicates the serialized block size exceeds the
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// maximum allowed size.
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ErrBlockTooBig
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// ErrBlockWeightTooHigh indicates that the block's computed weight
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// metric exceeds the maximum allowed value.
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ErrBlockWeightTooHigh
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// ErrBlockVersionTooOld indicates the block version is too old and is
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// no longer accepted since the majority of the network has upgraded
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// to a newer version.
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ErrBlockVersionTooOld
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// ErrInvalidTime indicates the time in the passed block has a precision
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// that is more than one second. The chain consensus rules require
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// timestamps to have a maximum precision of one second.
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ErrInvalidTime
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// ErrTimeTooOld indicates the time is either before the median time of
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// the last several blocks per the chain consensus rules or prior to the
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// most recent checkpoint.
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ErrTimeTooOld
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// ErrTimeTooNew indicates the time is too far in the future as compared
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// the current time.
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ErrTimeTooNew
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// ErrDifficultyTooLow indicates the difficulty for the block is lower
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// than the difficulty required by the most recent checkpoint.
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ErrDifficultyTooLow
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// ErrUnexpectedDifficulty indicates specified bits do not align with
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// the expected value either because it doesn't match the calculated
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// valued based on difficulty regarted rules or it is out of the valid
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// range.
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ErrUnexpectedDifficulty
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// ErrHighHash indicates the block does not hash to a value which is
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// lower than the required target difficultly.
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ErrHighHash
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// ErrBadMerkleRoot indicates the calculated merkle root does not match
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// the expected value.
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ErrBadMerkleRoot
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// ErrBadCheckpoint indicates a block that is expected to be at a
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// checkpoint height does not match the expected one.
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ErrBadCheckpoint
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// ErrForkTooOld indicates a block is attempting to fork the block chain
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// before the most recent checkpoint.
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ErrForkTooOld
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// ErrCheckpointTimeTooOld indicates a block has a timestamp before the
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// most recent checkpoint.
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ErrCheckpointTimeTooOld
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// ErrNoTransactions indicates the block does not have a least one
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// transaction. A valid block must have at least the coinbase
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// transaction.
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ErrNoTransactions
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// ErrNoTxInputs indicates a transaction does not have any inputs. A
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// valid transaction must have at least one input.
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ErrNoTxInputs
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// ErrNoTxOutputs indicates a transaction does not have any outputs. A
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// valid transaction must have at least one output.
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ErrNoTxOutputs
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// ErrTxTooBig indicates a transaction exceeds the maximum allowed size
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// when serialized.
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ErrTxTooBig
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// ErrBadTxOutValue indicates an output value for a transaction is
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// invalid in some way such as being out of range.
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ErrBadTxOutValue
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// ErrDuplicateTxInputs indicates a transaction references the same
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// input more than once.
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ErrDuplicateTxInputs
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// ErrBadTxInput indicates a transaction input is invalid in some way
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// such as referencing a previous transaction outpoint which is out of
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// range or not referencing one at all.
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ErrBadTxInput
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// ErrMissingTxOut indicates a transaction output referenced by an input
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// either does not exist or has already been spent.
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ErrMissingTxOut
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// ErrUnfinalizedTx indicates a transaction has not been finalized.
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// A valid block may only contain finalized transactions.
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ErrUnfinalizedTx
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// ErrDuplicateTx indicates a block contains an identical transaction
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// (or at least two transactions which hash to the same value). A
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// valid block may only contain unique transactions.
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ErrDuplicateTx
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// ErrOverwriteTx indicates a block contains a transaction that has
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// the same hash as a previous transaction which has not been fully
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// spent.
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ErrOverwriteTx
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// ErrImmatureSpend indicates a transaction is attempting to spend a
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// coinbase that has not yet reached the required maturity.
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ErrImmatureSpend
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// ErrSpendTooHigh indicates a transaction is attempting to spend more
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// value than the sum of all of its inputs.
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ErrSpendTooHigh
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// ErrBadFees indicates the total fees for a block are invalid due to
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// exceeding the maximum possible value.
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ErrBadFees
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// ErrTooManySigOps indicates the total number of signature operations
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// for a transaction or block exceed the maximum allowed limits.
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ErrTooManySigOps
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// ErrFirstTxNotCoinbase indicates the first transaction in a block
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// is not a coinbase transaction.
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ErrFirstTxNotCoinbase
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// ErrMultipleCoinbases indicates a block contains more than one
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// coinbase transaction.
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ErrMultipleCoinbases
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// ErrBadCoinbaseScriptLen indicates the length of the signature script
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// for a coinbase transaction is not within the valid range.
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ErrBadCoinbaseScriptLen
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// ErrBadCoinbaseValue indicates the amount of a coinbase value does
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// not match the expected value of the subsidy plus the sum of all fees.
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ErrBadCoinbaseValue
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// ErrMissingCoinbaseHeight indicates the coinbase transaction for a
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// block does not start with the serialized block block height as
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// required for version 2 and higher blocks.
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ErrMissingCoinbaseHeight
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// ErrBadCoinbaseHeight indicates the serialized block height in the
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// coinbase transaction for version 2 and higher blocks does not match
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// the expected value.
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ErrBadCoinbaseHeight
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// ErrScriptMalformed indicates a transaction script is malformed in
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// some way. For example, it might be longer than the maximum allowed
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// length or fail to parse.
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ErrScriptMalformed
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// ErrScriptValidation indicates the result of executing transaction
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// script failed. The error covers any failure when executing scripts
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// such signature verification failures and execution past the end of
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// the stack.
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ErrScriptValidation
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// ErrUnexpectedWitness indicates that a block includes transactions
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// with witness data, but doesn't also have a witness commitment within
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// the coinbase transaction.
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ErrUnexpectedWitness
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// ErrInvalidWitnessCommitment indicates that a block's witness
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// commitment is not well formed.
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ErrInvalidWitnessCommitment
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// ErrWitnessCommitmentMismatch indicates that the witness commitment
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// included in the block's coinbase transaction doesn't match the
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// manually computed witness commitment.
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ErrWitnessCommitmentMismatch
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// ErrPreviousBlockUnknown indicates that the previous block is not known.
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ErrPreviousBlockUnknown
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// ErrInvalidAncestorBlock indicates that an ancestor of this block has
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// already failed validation.
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ErrInvalidAncestorBlock
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// ErrPrevBlockNotBest indicates that the block's previous block is not the
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// current chain tip. This is not a block validation rule, but is required
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// for block proposals submitted via getblocktemplate RPC.
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ErrPrevBlockNotBest
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)
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// Map of ErrorCode values back to their constant names for pretty printing.
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var errorCodeStrings = map[ErrorCode]string{
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ErrDuplicateBlock: "ErrDuplicateBlock",
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ErrBlockTooBig: "ErrBlockTooBig",
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ErrBlockVersionTooOld: "ErrBlockVersionTooOld",
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ErrBlockWeightTooHigh: "ErrBlockWeightTooHigh",
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ErrInvalidTime: "ErrInvalidTime",
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ErrTimeTooOld: "ErrTimeTooOld",
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ErrTimeTooNew: "ErrTimeTooNew",
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ErrDifficultyTooLow: "ErrDifficultyTooLow",
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ErrUnexpectedDifficulty: "ErrUnexpectedDifficulty",
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ErrHighHash: "ErrHighHash",
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ErrBadMerkleRoot: "ErrBadMerkleRoot",
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ErrBadCheckpoint: "ErrBadCheckpoint",
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ErrForkTooOld: "ErrForkTooOld",
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ErrCheckpointTimeTooOld: "ErrCheckpointTimeTooOld",
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ErrNoTransactions: "ErrNoTransactions",
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ErrNoTxInputs: "ErrNoTxInputs",
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ErrNoTxOutputs: "ErrNoTxOutputs",
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ErrTxTooBig: "ErrTxTooBig",
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ErrBadTxOutValue: "ErrBadTxOutValue",
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ErrDuplicateTxInputs: "ErrDuplicateTxInputs",
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ErrBadTxInput: "ErrBadTxInput",
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ErrMissingTxOut: "ErrMissingTxOut",
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ErrUnfinalizedTx: "ErrUnfinalizedTx",
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ErrDuplicateTx: "ErrDuplicateTx",
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ErrOverwriteTx: "ErrOverwriteTx",
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ErrImmatureSpend: "ErrImmatureSpend",
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ErrSpendTooHigh: "ErrSpendTooHigh",
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ErrBadFees: "ErrBadFees",
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ErrTooManySigOps: "ErrTooManySigOps",
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ErrFirstTxNotCoinbase: "ErrFirstTxNotCoinbase",
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ErrMultipleCoinbases: "ErrMultipleCoinbases",
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ErrBadCoinbaseScriptLen: "ErrBadCoinbaseScriptLen",
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ErrBadCoinbaseValue: "ErrBadCoinbaseValue",
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ErrMissingCoinbaseHeight: "ErrMissingCoinbaseHeight",
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ErrBadCoinbaseHeight: "ErrBadCoinbaseHeight",
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ErrScriptMalformed: "ErrScriptMalformed",
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ErrScriptValidation: "ErrScriptValidation",
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ErrUnexpectedWitness: "ErrUnexpectedWitness",
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ErrInvalidWitnessCommitment: "ErrInvalidWitnessCommitment",
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ErrWitnessCommitmentMismatch: "ErrWitnessCommitmentMismatch",
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ErrPreviousBlockUnknown: "ErrPreviousBlockUnknown",
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ErrInvalidAncestorBlock: "ErrInvalidAncestorBlock",
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ErrPrevBlockNotBest: "ErrPrevBlockNotBest",
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}
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// String returns the ErrorCode as a human-readable name.
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func (e ErrorCode) String() string {
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if s := errorCodeStrings[e]; s != "" {
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return s
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}
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return fmt.Sprintf("Unknown ErrorCode (%d)", int(e))
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}
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// RuleError identifies a rule violation. It is used to indicate that
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// processing of a block or transaction failed due to one of the many validation
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// rules. The caller can use type assertions to determine if a failure was
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// specifically due to a rule violation and access the ErrorCode field to
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// ascertain the specific reason for the rule violation.
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type RuleError struct {
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ErrorCode ErrorCode // Describes the kind of error
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Description string // Human readable description of the issue
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}
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// Error satisfies the error interface and prints human-readable errors.
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func (e RuleError) Error() string {
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return e.Description
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}
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// ruleError creates an RuleError given a set of arguments.
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func ruleError(c ErrorCode, desc string) RuleError {
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return RuleError{ErrorCode: c, Description: desc}
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}
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