420 Bridge concepts

Chain identity binds route chain ID to an explicit network fingerprint and verifier/chain family.

Bridge asset maps an external asset to its canonical local representation under bridge policy.

Route binds asset, source/destination chains and assets, adapter, verifier configuration and direction.

Proof adapter verifies external evidence but does not override local policy/risk/replay checks.

Transfer identity is replay-protected and domain-bound to the route, asset, sender/recipient, amount and source references.