Use 73 bytes der-encoded signatures in weight estimation #836
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While 73 bytes der-encoded signatures aren't standard (they're only possible with high-S signatures), miners could accept such signatures. Most of our tests use 72 bytes der-encoded signatures because we will never generate 73 bytes der-encoded signatures ourselves. But it's more safe to use a 73 bytes signature in our weight estimation because: - it's what the BOLTs recommend - it's what other implementations use (e.g. LDK) which means they may reject our interactive-tx attempts by thinking we're under-paying fees
sstone
approved these changes
Nov 5, 2025
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While 73 bytes der-encoded signatures aren't standard (they're only possible with high-S signatures), miners could accept such signatures.
Most of our tests use 72 bytes der-encoded signatures because we will never generate 73 bytes der-encoded signatures ourselves. But it's more safe to use a 73 bytes signature in our weight estimation because: