API Error code ranges

• 999 - Unknown Errors
• 10XXX - Transaction Errors
• 20XXX - Commitment Errors
• 30XXX - Batch Errors
• 40XXX - Badger Errors
• 50XXX - Proof Errors
• 99XXX - Uncategorized Errors like NetworkInfo, BLS, UserStates etc.
• -32XXX - JSON-RPC library errors

Commander API errors

Error code	Message
999	unknown error: COMMANDER_ERROR
10000	transaction not found
10001	DEPRECATED:transactions not found
10002	some field is missing, verify the transfer/create2transfer object
10003	invalid recipient, cannot send funds to yourself
10004	nonce too low
10005	DEPRECATED: nonce too high
10006	not enough balance
10007	amount must be greater than 0
10008	fee too low
10009	invalid signature
10010	amount is not encodable as multi-precission decimal
10011	fee is not encodable as multi-precission decimal
10012	sender state ID does not exist
10013	DEPRECATED:spoke ID must be greater than 0
10014	cannot update mined transaction
10015	transaction already exists
10016	spoke with given ID does not exist
10017	commander instance is not accepting transactions
20000	commitment not found
30000	batch not found
30001	batches not found
40000	an error occurred while saving data to the Badger database
40001	an error occurred while iterating over Badger database
50000	proof methods disabled
50001	commitment inclusion proof could not be generated
50002	public key inclusion proof could not be generated
50003	user state inclusion proof could not be generated
50004	mass migration commitment inclusion proof could not be generated
50005	withdraw proof could not be calculated for a given batch
50006	invalid batch type, only mass migration batches are supported
50007	mass migration with given transaction hash was not found in a given commitment
50008	commitment inclusion proof can only be generated for Transfer/Create2Transfer commitments
50009	mass migration commitment inclusion proof cannot be generated for different type of commitments
99000	an error occurred while fetching the account count
99001	public key not found
99002	user state not found
99003	user states not found
99004	an error occurred while fetching the domain for signing

JSON-RPC library errors

Error code	Type	Example messages
-32700	Parse error	"parse error"
-32600	Invalid request	"empty batch" or "invalid request"
-32601	Method not found	"the method foo_bar does not exist/is not available"
-32602	Invalid params	"invalid argument 0: error unmarshalling Uint256"
-32603	Internal error	reserved error code (probably unused)
-32099 to -32000	Internal error	reserved error code range (probably unused)

Read more about default errors in JSON-RPC 2.0 specification here.