network property
Network is the CAIP-2 identifier the payment was settled under, e.g. "eip155:36963". Its eip155 reference is the chain id in the EIP-712 domain the payer signed, so it is not a label — changing it invalidates the signature.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? network;