The Circle notification that a user-custody wallet challenge completed. Authenticated by the X-Circle-Signature ECDSA signature over the raw body under the key named by X-Circle-Key-Id, not by a URnetwork JWT. A challenges.initialize notification whose event is a completed INITIALIZE links the created wallet to the network named by the challenge's correlation id. Same handler as POST /pay/circle.
Request bodyshow schema
The first entry names the network the wallet belongs to.