Shulou(Shulou.com)06/01 Report--

Bitcoin node receives a block, will check and confirm, as follows:

The key is to check the transactions in the block further:

1.// First transaction must be coinbase, the rest must not be

2.if (vtx.empty() || ! vtx[0].IsCoinBase())

return error("CheckBlock() : first tx is not coinbase");

4.for (int i = 1; i

< vtx.size(); i++)if (vtx[i].IsCoinBase())return error("CheckBlock() : more than one coinbase"); 8.// Check transactions 循环检查所有的交易，这一步骤很关键，所以交易不能随便改，大家都在检查 9.foreach(const CTransaction& tx, vtx) if (!tx.CheckTransaction())return error("CheckBlock() : CheckTransaction failed"); 13.// Check proof of work matches claimed amount 14.if (CBigNum().SetCompact(nBits) >

bnProofOfWorkLimit)

return error("CheckBlock() : nBits below minimum work");

16.if (GetHash() > CBigNum().SetCompact(nBits).getuint256())return error("CheckBlock() : hash doesn't match nBits");

19.// Check merkleroot

20.if (hashMerkleRoot != BuildMerkleTree())

return error("CheckBlock() : hashMerkleRoot mismatch");

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