keychain

type Keychain interface {
	// The returned Signer can provide a signature for [addr]
	Get(addr ids.ShortID) (Signer, bool)
	// Returns the set of addresses for which the accessor keeps an associated
	// signer
	Addresses() set.Set[ids.ShortID]
}

type Signer interface {
	Sign([]byte) ([]byte, error)
	Address() ids.ShortID
}