Comment by madars

eCash is an answer to "can you move value privately?" (yes, with concessions). Radius is solving "can you execute a million conditional state transitions per second at sub-penny costs?" Blind signatures are still just value transfers and offer no expressivity. If your agent wants DvP with conditional logic, or trustless escrow that releases on programmatic conditions, Chaumian eCash doesn't help. LN gets you close to some forms of atomic exchange, but close-to-atomic isn't atomic, and neither gives you composability. You can move balances, but you can't orchestrate multi-step workflows that can't unwind in the middle.