hashMerkleRoot mismatch ERROR: ProcessBlock() : CheckBlock FAILED

[educatedwarrior]

ThreadRPCServer method=submitblock ERROR: CheckBlock() : hashMerkleRoot mismatch ERROR: ProcessBlock() : CheckBlock FAILED

Has anyone anyone every experienced this error. I found it in the daemon debug.log Trying to set up pool for SpectrumCoin Groestl. It works when solo mining, but when using nomp, can't submit blocks.

Any help would be appreciated.

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[BigMcRat]

I have same ERROR with LitecoinDark, anyone can help?

[progmax]

same error! any solution?

[marikuns]

its look like wrong merkleroot calclulation here in fire merkleRoot.js i dont sure about it, but i havent any other ideas.

[phantanthanh1996]

I have have same issue. Anyone pls help?

[volbil]

Same error, @phantanthanh1996 have you fixed this issue?

[cryptonana]

Hi, NPW block header have 32 byte more data than other Bitcoin like projects, so when submit block data to rpc daemon, NPW need add 32 byte more data set to 0, If you use nomp pool please refer https://github.com/guantau/node-open-mining-portal. If you use yiimp, you can open client_submit.cpp and add follow code after line 247, then recompile stratum.

if(g_current_algo->name && !strcmp("NPW", coind->symbol)) {
    char head[168];
    char extra[10 * 1024];
    memset(head, 0, 168);
    memset(extra, 0, 10 * 1024);
    strncpy(head, block_hex, 160);
    sprintf(extra, "%s", &block_hex[160]);
    sprintf(block_hex, "%s0000000000000000000000000000000000000000000000000000000000000000%s", head, extra);
}
debuglog("block data : \n%s\n", block_hex);

When yiimp pool can get valid blocks, you can remove debuglog code above. Hope this will help you to solve your issue.