Error codes

Who this is for: developers debugging a failed call.

Source	Codes documented
Standard JSON-RPC (eth_*) errors	Standard Ethereum JSON-RPC error codes likely apply, but this is an assumption, not a confirmed Lumia value. See /reference/json-rpc-api.
KYC Verifier API	No explicit error codes; only a status enum (success, approved, failed, pending states). See /reference/rest-apis/kyc-verifier-api.