Bitcoin (BTC) Signature Aggregation Drafts Could Cut Modeled Fees 27.3%

Three Bitcoin signature-aggregation drafts entered the proposal archive in early November, outlining formats that could shrink select transactions and lower modeled fees by as much as 27.3%. BIP 458 was merged Nov. 2, BIP 459 on Nov. 3 and BIP 460 on Nov. 4. They remain draft specifications; their addition to the repository did not change Bitcoin’s network rules or make lower fees available to users. BIP 458 describes noninteractive half-aggregation, which combines signatures without requiring signers to coordinate in a joint signing session. BIP 459 specifies full aggregation, which can combine signatures into one 64-byte signature but requires signers to coordinate through two rounds. BIP 460 proposes applying the methods across transaction inputs.

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