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Check transaction count early in submitblock.

There is no point in even hashing a submitted block which doesn't have
 a coinbase transaction.

This also results in more useful error reporting on corrupted input.

Thanks to rawodb for the bug report.
0.15
Gregory Maxwell 8 years ago
parent
commit
4f15ea102d
  1. 4
      src/rpc/mining.cpp

4
src/rpc/mining.cpp

@ -744,6 +744,10 @@ UniValue submitblock(const JSONRPCRequest& request) @@ -744,6 +744,10 @@ UniValue submitblock(const JSONRPCRequest& request)
if (!DecodeHexBlk(block, request.params[0].get_str()))
throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed");
if (block.vtx.empty() || !block.vtx[0]->IsCoinBase()) {
throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block does not start with a coinbase");
}
uint256 hash = block.GetHash();
bool fBlockPresent = false;
{

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