Signature verification failed#
Compare field scope, sort order, empty values, amount strings, callback URLs and the assigned API key. Remove signature fields before recomputing the digest.
Review signingNotification missing or repeated#
Check your callback logs, public reachability and signature handling. Process repeats idempotently. If a notification is missing, query the original order. The source does not specify a callback retry schedule.
Timeout or unexpected HTML#
Where do channel codes come from?#
Use the channel and bank codes assigned to the merchant. The supplied documentation does not contain a complete public country code catalogue; do not guess codes from bank or wallet names.