I try to submit the block, what I mined, but it is not accepted. Also, I could not find the solution by searching the similar questions.
Setup: Centos 8 Linux, Qt programing and /bitcoincore/bitcoin-22.0rc3 with signet. The signet option is also in the config file. Generally; everything works.
1. submitheader seems to work. I tried to modify the nonce and it was rejected, as expected.
2. submitblock is rejected with the error message of "bad-signet-blksig".
Just by chance I met a getblocktemplate without transactions. I include it here, I hope it does not take up too long storage space.
[mself@localhost bin]$ ./bitcoin-cli submitblock "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"
Answer: bad-signet-blksig
3. Somewhere I read, I have to include "-signet" (./bitcoin-cli -signet submitblock ...), this case there are no error messages, but the block is not accepted, never enters into the signet blk0000x.dat blocks.
4. I was checking the accepted blocks in the blk0000x.dat files. I found only one significant difference to my block. In the coinbase transaction, at the second output, the Script PubKey length in my case is 0x26=38 bytes. It comes from the "6a24aa21a9ed" plus the 32 bytes of SHA256(SHA256(witness root hash concatenated with witness reserved value)).
The description sad: the part after the 38-th byte are optional. On the contrary, all of the accepted blocks in the blk0000x.dat files have 0x77=119 bytes. The first 38 bytes are the same structure, as mine, but there are additional bytes attached.
Finally, my question: what did I do wrong, what should I correct? Thanks, for any answer.
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