Bitcoin’s proposal repository added the BIP458, BIP459 and BIP460 drafts between November 2 and 4. These proposals combine signatures from multiple inputs to reduce their size, from 640 bytes to 352 bytes with half-aggregation, or 64 bytes with full aggregation for ten signatures. In a modeled transaction with ten inputs and ten outputs, fees could fall by about 7.1% with half-aggregation and 14.2% with full aggregation. Consolidating 100 inputs into one output could reduce fees by 13.6% or 27.3%, respectively, but activation parameters remain unspecified and wallets will need to support the new output type.
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