Doable Difficulty: Incorrect Block Top Format within the Coinbase Transaction
In Regtest mode, BIP34 (which enforces the block top within the coinbase transaction) is activated at block top 500. Because of this earlier than block 500, you don’t have to incorporate the peak within the coinbase transaction.
Nevertheless, for those who do embrace the peak, you should format it appropriately:
• The peak ought to be a Compact Dimension VarInt adopted by the peak in little-endian format.
• You might be utilizing 0101, however that is possible misformatted.
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Resolution: Right the Coinbase Transaction Format
Strive utilizing this correctly formatted top area:
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 top 1 ought to be:
0101
Which looks like what you will have, however guarantee there aren’t any further bytes or misinterpretation.
Various: Take away Top Subject for Blocks <500
Since Regtest doesn’t require BIP34 enforcement earlier than top 500, you may attempt eradicating the peak area completely and see if the block will get accepted.
Extra Checks
1. Guarantee Your Block Template Matches Regtest Guidelines
• Regtest mode begins at top 0 (Genesis Block), so the following block ought to be top 1.
• In case your script is manually creating blocks, verify that it’s utilizing the correct top.
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 an alternative of manually setting up the block, attempt:
bitcoin-cli -regtest generatetoaddress 1
If this works, your manually constructed block could have a problem with the coinbase transaction.
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Remaining Steps
• Strive eradicating the peak area for blocks <500.
• Double-check the peak encoding (ought to be 0101 for top 1).
• Use Bitcoin Core’s generatetoaddress to confirm if it’s a problem together with your setup.
