Signature Schemes

There are two address types which require corresponding signature schemes:

1. "RedeemAddress": Ethereum account address (for ERC20 redeem / backwards-compatibility); see init/address.rs in chain-core.
2. "Tree": threshold multisig addresses; records a root of a "Merklized Abstract Syntax Tree" where branches are "OR" operations and leafs are Blake3 hashes of aggregated X-only public keys:

• Merklized Abstract Syntax Tree
• MuSig: A New Multisignature Standard