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Callback - Receive TXID Notify

When the Travel Rule Initiator VASP executed the crypto asset transfer on the blockchain, you will receive this callback notification with callbackType=7 for the actual blockchain tx_id.

Request & Response​

You can expect to receive below request payload from GTR with callbackType=7:

{
  "requestId": "gtr-FdXI1VL3CepU",
  "invokeVaspCode": "gdummy",
  "originatorVasp": "gdummy",
  "beneficiaryVasp": "gdummy",
  "callbackType": 7,
  "callbackData": {
    "txId": "tx-id-9GsPvXKKRVXT",
    "requestId": "perf-test-k-VZWX2ZJ9u2nC"
  }
}

Upon receive this request, you don't have to verify anything. You can just respond as received.

{
  "verifyMessage": "TX ID Received",
  "verifyStatus": 100000
}

💡 GTR Implementation Recommendations

  • Once you receive this callback, you can save the mapping of txId to requestId into your in-house Travel Rule records.
  • When you receive a deposit from blockchain, you should look up the requestId by the txId to check whether this deposit transaction has already undergone a Travel Rule.