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mining: accomodate pre-BIP0141 coinbase structure

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Some popular pool software, yiimp for example, constructs coinbase
in pre-BIP0141 style, which results in rejection of submitblock.
This commit is contained in:
Roy Lee 2022-08-10 00:34:59 -07:00
parent fcfb2af76f
commit be0d7de8da
1 changed files with 15 additions and 0 deletions
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15
blockchain/merkle.go
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@ -11,6 +11,7 @@ import (
"github.com/lbryio/lbcd/chaincfg/chainhash"
"github.com/lbryio/lbcd/txscript"
"github.com/lbryio/lbcd/wire"
btcutil "github.com/lbryio/lbcutil"
)
@ -227,6 +228,20 @@ func ValidateWitnessCommitment(blk *btcutil.Block) error {
// coinbase transaction MUST have exactly one witness element within
// its witness data and that element must be exactly
// CoinbaseWitnessDataLen bytes.
//
// Some popular pool software, for example yiimp, uses pre-BIP0141
// coinbase struture. In this case, we don't just accept it, but also
// turn it into post-BIP0141 format.
if len(coinbaseTx.MsgTx().TxIn[0].Witness) == 0 {
log.Infof("pre-BIP0141 coinbase transaction detected. Height: %d", blk.Height())
var witnessNonce [CoinbaseWitnessDataLen]byte
coinbaseTx.MsgTx().TxIn[0].Witness = wire.TxWitness{witnessNonce[:]}
blk.MsgBlock().Transactions[0].TxIn[0].Witness = wire.TxWitness{witnessNonce[:]}
// Clear cached serialized block.
blk.SetBytes(nil)
}
coinbaseWitness := coinbaseTx.MsgTx().TxIn[0].Witness
if len(coinbaseWitness) != 1 {
str := fmt.Sprintf("the coinbase transaction has %d items in "+