mirror of
https://github.com/kaspanet/kaspad.git
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21b82d7efc
* minor text fix * Implement a block template cache with template modification/reuse mechanism * Fix compilation error * Address review comments * Added a through TestModifyBlockTemplate test * Update header timestamp if possible * Avoid copying the transactions when only the header changed * go fmt
95 lines
5.1 KiB
Go
95 lines
5.1 KiB
Go
package coinbasemanager
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import (
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"encoding/binary"
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"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
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"github.com/kaspanet/kaspad/domain/consensus/ruleerrors"
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"github.com/pkg/errors"
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)
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const uint64Len = 8
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const uint16Len = 2
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const lengthOfSubsidy = uint64Len
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const lengthOfScriptPubKeyLength = 1
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const lengthOfVersionScriptPubKey = uint16Len
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// serializeCoinbasePayload builds the coinbase payload based on the provided scriptPubKey and extra data.
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func (c *coinbaseManager) serializeCoinbasePayload(blueScore uint64,
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coinbaseData *externalapi.DomainCoinbaseData, subsidy uint64) ([]byte, error) {
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scriptLengthOfScriptPubKey := len(coinbaseData.ScriptPublicKey.Script)
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if scriptLengthOfScriptPubKey > int(c.coinbasePayloadScriptPublicKeyMaxLength) {
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return nil, errors.Wrapf(ruleerrors.ErrBadCoinbasePayloadLen, "coinbase's payload script public key is "+
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"longer than the max allowed length of %d", c.coinbasePayloadScriptPublicKeyMaxLength)
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}
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payload := make([]byte, uint64Len+lengthOfVersionScriptPubKey+lengthOfScriptPubKeyLength+scriptLengthOfScriptPubKey+len(coinbaseData.ExtraData)+lengthOfSubsidy)
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binary.LittleEndian.PutUint64(payload[:uint64Len], blueScore)
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binary.LittleEndian.PutUint64(payload[uint64Len:], subsidy)
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payload[uint64Len+lengthOfSubsidy] = uint8(coinbaseData.ScriptPublicKey.Version)
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payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey] = uint8(len(coinbaseData.ScriptPublicKey.Script))
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copy(payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey+lengthOfScriptPubKeyLength:], coinbaseData.ScriptPublicKey.Script)
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copy(payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey+lengthOfScriptPubKeyLength+scriptLengthOfScriptPubKey:], coinbaseData.ExtraData)
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return payload, nil
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}
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// ModifyCoinbasePayload modifies the coinbase payload based on the provided scriptPubKey and extra data.
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func ModifyCoinbasePayload(payload []byte, coinbaseData *externalapi.DomainCoinbaseData, coinbasePayloadScriptPublicKeyMaxLength uint8) ([]byte, error) {
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scriptLengthOfScriptPubKey := len(coinbaseData.ScriptPublicKey.Script)
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if scriptLengthOfScriptPubKey > int(coinbasePayloadScriptPublicKeyMaxLength) {
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return nil, errors.Wrapf(ruleerrors.ErrBadCoinbasePayloadLen, "coinbase's payload script public key is "+
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"longer than the max allowed length of %d", coinbasePayloadScriptPublicKeyMaxLength)
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}
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newPayloadLen := uint64Len + lengthOfVersionScriptPubKey + lengthOfScriptPubKeyLength + scriptLengthOfScriptPubKey + len(coinbaseData.ExtraData) + lengthOfSubsidy
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if len(payload) != newPayloadLen {
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newPayload := make([]byte, newPayloadLen)
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copy(newPayload, payload[:uint64Len+lengthOfSubsidy])
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payload = newPayload
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}
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payload[uint64Len+lengthOfSubsidy] = uint8(coinbaseData.ScriptPublicKey.Version)
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payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey] = uint8(len(coinbaseData.ScriptPublicKey.Script))
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copy(payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey+lengthOfScriptPubKeyLength:], coinbaseData.ScriptPublicKey.Script)
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copy(payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey+lengthOfScriptPubKeyLength+scriptLengthOfScriptPubKey:], coinbaseData.ExtraData)
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return payload, nil
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}
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// ExtractCoinbaseDataBlueScoreAndSubsidy deserializes the coinbase payload to its component (scriptPubKey, extra data, and subsidy).
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func (c *coinbaseManager) ExtractCoinbaseDataBlueScoreAndSubsidy(coinbaseTx *externalapi.DomainTransaction) (
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blueScore uint64, coinbaseData *externalapi.DomainCoinbaseData, subsidy uint64, err error) {
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minLength := uint64Len + lengthOfSubsidy + lengthOfVersionScriptPubKey + lengthOfScriptPubKeyLength
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if len(coinbaseTx.Payload) < minLength {
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return 0, nil, 0, errors.Wrapf(ruleerrors.ErrBadCoinbasePayloadLen,
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"coinbase payload is less than the minimum length of %d", minLength)
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}
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blueScore = binary.LittleEndian.Uint64(coinbaseTx.Payload[:uint64Len])
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subsidy = binary.LittleEndian.Uint64(coinbaseTx.Payload[uint64Len:])
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scriptPubKeyVersion := uint16(coinbaseTx.Payload[uint64Len+lengthOfSubsidy])
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scriptPubKeyScriptLength := coinbaseTx.Payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey]
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if scriptPubKeyScriptLength > c.coinbasePayloadScriptPublicKeyMaxLength {
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return 0, nil, 0, errors.Wrapf(ruleerrors.ErrBadCoinbasePayloadLen, "coinbase's payload script public key is "+
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"longer than the max allowed length of %d", c.coinbasePayloadScriptPublicKeyMaxLength)
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}
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if len(coinbaseTx.Payload) < minLength+int(scriptPubKeyScriptLength) {
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return 0, nil, 0, errors.Wrapf(ruleerrors.ErrBadCoinbasePayloadLen,
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"coinbase payload doesn't have enough bytes to contain a script public key of %d bytes", scriptPubKeyScriptLength)
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}
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scriptPubKeyScript := coinbaseTx.Payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey+lengthOfScriptPubKeyLength : uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey+lengthOfScriptPubKeyLength+scriptPubKeyScriptLength]
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return blueScore, &externalapi.DomainCoinbaseData{
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ScriptPublicKey: &externalapi.ScriptPublicKey{Script: scriptPubKeyScript, Version: scriptPubKeyVersion},
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ExtraData: coinbaseTx.Payload[uint64Len+lengthOfSubsidy+lengthOfVersionScriptPubKey+lengthOfScriptPubKeyLength+scriptPubKeyScriptLength:],
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}, subsidy, nil
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}
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