davide/pallectrum
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add support for LWMA chains by skipping pow validation

Browse Source 
Add SKIP_POW_DIFFICULTY_VALIDATION flag to AbstractNet for chains using custom difficulty algorithms like LWMA. Update blockchain.py to skip pow validation when flag is set, relying on server validation and checkpoints instead. Also update Palladium checkpoints.
This commit is contained in:
Davide Grilli
2025-11-20 16:32:11 +01:00
parent 823454f825
commit 912f610e26
3 changed files with 660 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
electrum/blockchain.py
View File

@@ -312,13 +312,16 @@ class Blockchain(Logger):
raise InvalidHeader("prev hash mismatch: %s vs %s" % (prev_hash, header.get('prev_block_hash')))
if constants.net.TESTNET:
return
bits = cls.target_to_bits(target)
if bits != header.get('bits'):
raise InvalidHeader("bits mismatch: %s vs %s" % (bits, header.get('bits')))
_pow_hash = pow_hash_header(header)
pow_hash_as_num = int.from_bytes(bfh(_pow_hash), byteorder='big')
if pow_hash_as_num > target:
raise InvalidHeader(f"insufficient proof of work: {pow_hash_as_num} vs target {target}")
# Skip difficulty validation for chains with custom difficulty algorithms (e.g., LWMA)
# We rely on server validation and checkpoints instead
if not constants.net.SKIP_POW_DIFFICULTY_VALIDATION:
bits = cls.target_to_bits(target)
if bits != header.get('bits'):
raise InvalidHeader("bits mismatch: %s vs %s" % (bits, header.get('bits')))
_pow_hash = pow_hash_header(header)
pow_hash_as_num = int.from_bytes(bfh(_pow_hash), byteorder='big')
if pow_hash_as_num > target:
raise InvalidHeader(f"insufficient proof of work: {pow_hash_as_num} vs target {target}")
def verify_chunk(self, index: int, data: bytes) -> None:
num = len(data) // HEADER_SIZE