Taproot

A Bitcoin soft fork (BIP-341) that introduced Schnorr signatures and Merklized Abstract Syntax Trees (MAST), allowing complex scripts to look like simple single-key spends when all parties cooperate. Taproot improves privacy, reduces fees for cooperative closings, and enables aggregated signatures via MuSig2. SSP's future Taproot multisig would have the same on-chain footprint as a single-key spend in the cooperative case.