025ce301a2
This updates the blockchain/stake module dependencies, the copyright year in the files modified since the previous release, and serves as a base for blockchain/stake/v4.0.0. The updated direct dependencies in this commit are as follows: - github.com/decred/dcrd/database/v3@v3.0.0 - github.com/decred/dcrd/dcrutil/v4@v4.0.0 The full list of updated direct dependencies since the previous blockchain/stake/v3.0.0 release are as follows: - github.com/decred/dcrd/chaincfg/chainhash@v1.0.3 - github.com/decred/dcrd/chaincfg/v3@v3.1.0 - github.com/decred/dcrd/database/v3@v3.0.0 - github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 - github.com/decred/dcrd/dcrutil/v4@v4.0.0 - github.com/decred/dcrd/txscript/v4@v4.0.0 - github.com/decred/dcrd/wire@v1.5.0 - github.com/decred/slog@v1.2.0 The following direct dependencies are no longer required as compared to the previous release: - github.com/decred/dcrd/dcrec Finally, all modules in the repository that depend on the module are tidied to ensure they are updated to use the latest versions hoisted forward as a result.
83 lines
2.6 KiB
Go
83 lines
2.6 KiB
Go
// Copyright (c) 2020-2021 The Decred developers
|
|
// Use of this source code is governed by an ISC
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package stake
|
|
|
|
import (
|
|
"github.com/decred/dcrd/txscript/v4"
|
|
)
|
|
|
|
// isScriptHashScript returns whether or not the passed script is a
|
|
// pay-to-script-hash script per consensus rules.
|
|
func isScriptHashScript(script []byte) bool {
|
|
// A pay-to-script-hash script is of the form:
|
|
// OP_HASH160 <20-byte scripthash> OP_EQUAL
|
|
return len(script) == 23 &&
|
|
script[0] == txscript.OP_HASH160 &&
|
|
script[1] == txscript.OP_DATA_20 &&
|
|
script[22] == txscript.OP_EQUAL
|
|
}
|
|
|
|
// isPubKeyHashScript returns whether or not the passed script is
|
|
// a pay-to-pubkey-hash script per consensus rules.
|
|
func isPubKeyHashScript(script []byte) bool {
|
|
// A pay-to-pubkey-hash script is of the form:
|
|
// OP_DUP OP_HASH160 <20-byte hash> OP_EQUALVERIFY OP_CHECKSIG
|
|
return len(script) == 25 &&
|
|
script[0] == txscript.OP_DUP &&
|
|
script[1] == txscript.OP_HASH160 &&
|
|
script[2] == txscript.OP_DATA_20 &&
|
|
script[23] == txscript.OP_EQUALVERIFY &&
|
|
script[24] == txscript.OP_CHECKSIG
|
|
}
|
|
|
|
// isTaggedScript checks if the provided script is tagged by the
|
|
// provided op code.
|
|
func isTaggedScript(version uint16, script []byte, op int) bool {
|
|
// The only supported version is 0.
|
|
if version != 0 {
|
|
return false
|
|
}
|
|
|
|
if len(script) < 1 {
|
|
return false
|
|
}
|
|
|
|
// A stake script pay-to-script-hash is of the form:
|
|
// <opcode> <P2PKH or P2SH script>
|
|
if int(script[0]) != op {
|
|
return false
|
|
}
|
|
|
|
return isPubKeyHashScript(script[1:]) || isScriptHashScript(script[1:])
|
|
}
|
|
|
|
// IsTicketPurchaseScript checks if the provided script is a ticket purchase
|
|
// script.
|
|
func IsTicketPurchaseScript(version uint16, script []byte) bool {
|
|
return isTaggedScript(version, script, txscript.OP_SSTX)
|
|
}
|
|
|
|
// IsRevocationScript checks if the provided script is a ticket revocation
|
|
// script.
|
|
func IsRevocationScript(version uint16, script []byte) bool {
|
|
return isTaggedScript(version, script, txscript.OP_SSRTX)
|
|
}
|
|
|
|
// IsStakeChangeScript checks if the provided script is a stake change script.
|
|
func IsStakeChangeScript(version uint16, script []byte) bool {
|
|
return isTaggedScript(version, script, txscript.OP_SSTXCHANGE)
|
|
}
|
|
|
|
// IsVoteScript checks if the provided script is a vote script.
|
|
func IsVoteScript(version uint16, script []byte) bool {
|
|
return isTaggedScript(version, script, txscript.OP_SSGEN)
|
|
}
|
|
|
|
// IsTreasuryGenScript checks if the provided script is a treasury generation
|
|
// script.
|
|
func IsTreasuryGenScript(version uint16, script []byte) bool {
|
|
return isTaggedScript(version, script, txscript.OP_TGEN)
|
|
}
|