Potential Subject: Incorrect Block Top Format within the Coinbase Transaction
In Regtest mode, BIP34 (which enforces the block peak within the coinbase transaction) is activated at block peak 500. Because of this earlier than block 500, you don’t have to incorporate the peak within the coinbase transaction.
Nevertheless, should you do embrace the peak, it’s essential to format it accurately:
• The peak ought to be a Compact Dimension VarInt adopted by the peak in little-endian format.
• You’re utilizing 0101, however that is possible misformatted.
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Resolution: Appropriate the Coinbase Transaction Format
Attempt utilizing this correctly formatted peak subject:
For Block Top 1
• The Compact Dimension VarInt for 1-byte size is 01.
• The peak 1 in little-endian is 01.
So the proper encoding for peak 1 ought to be:
0101
Which looks like what you will have, however guarantee there are not any further bytes or misinterpretation.
Different: Take away Top Discipline for Blocks <500
Since Regtest doesn’t require BIP34 enforcement earlier than peak 500, you possibly can strive eradicating the peak subject totally and see if the block will get accepted.
Extra Checks
1. Guarantee Your Block Template Matches Regtest Guidelines
• Regtest mode begins at peak 0 (Genesis Block), so the subsequent block ought to be peak 1.
• In case your script is manually creating blocks, verify that it’s utilizing the best peak.
2. Confirm the Full Coinbase Transaction Construction
• Use a device like bitcoin-cli decoderawtransaction to verify your transaction format.
3. Use Bitcoin Core’s Constructed-in Mining for Debugging
As a substitute of manually developing the block, strive:
bitcoin-cli -regtest generatetoaddress 1
If this works, your manually constructed block could have a problem with the coinbase transaction.
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Last Steps
• Attempt eradicating the peak subject for blocks <500.
• Double-check the peak encoding (ought to be 0101 for peak 1).
• Use Bitcoin Core’s generatetoaddress to confirm if it’s a problem together with your setup.