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[release-v1.4] rpcserver: update block template reconstruction.

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This simplifies solved block reconstruction by removing the pkScript
reassignment and regeneration of the merkle root.
This commit is contained in:
Donald Adu-Poku 2019-01-15 23:55:50 +00:00 committed by Dave Collins
parent 10435f4de6
commit 63524cddcb
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GPG Key ID: B8904D9D9C93D1F2
1 changed files with 16 additions and 15 deletions
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31
rpcserver.go
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@ -4227,24 +4227,25 @@ func handleGetWorkSubmission(s *rpcServer, hexData string) (interface{}, error)
}
// Reconstruct the block using the submitted header stored block info.
// A temporary block is used because we will be mutating the contents
// for the construction of the correct regular merkle tree. You must
// also deep copy the block itself because it could be accessed outside
// of the GW workstate mutexes once it gets submitted to the
// The MsgBlock is copied here because it could be accessed
// outside of the GW workstate mutexes once it gets submitted to the
// blockchain.
tempBlock := dcrutil.NewBlockDeepCopy(blockInfo.msgBlock)
msgBlock := tempBlock.MsgBlock()
msgBlock.Header = submittedHeader
if msgBlock.Header.Height > 1 {
pkScriptCopy := make([]byte, len(blockInfo.pkScript))
copy(pkScriptCopy, blockInfo.pkScript)
msgBlock.Transactions[0].TxOut[1].PkScript = blockInfo.pkScript
merkles := blockchain.BuildMerkleTreeStore(tempBlock.Transactions())
msgBlock.Header.MerkleRoot = *merkles[len(merkles)-1]
msgBlockB, err := blockInfo.msgBlock.Bytes()
if err != nil {
return false, rpcInternalError("Unexpected error "+
"while serializing MsgBlock: "+err.Error(), "")
}
// The real block to submit, with a proper nonce and extraNonce.
block := dcrutil.NewBlockDeepCopyCoinbase(msgBlock)
var msgBlock wire.MsgBlock
err = msgBlock.FromBytes(msgBlockB)
if err != nil {
return false, rpcInternalError("Unexpected error "+
"while creating MsgBlock from bytes: "+err.Error(), "")
}
msgBlock.Header = submittedHeader
block := dcrutil.NewBlock(&msgBlock)
// Ensure the submitted block hash is less than the target difficulty.
err = blockchain.CheckProofOfWork(&block.MsgBlock().Header,