Confirms a quoted transaction to begin execution. This is the second step in the two-step transaction flow.

Flow

POST /api/v2/transaction/       →  Creates transaction (quoted)
PUT  /api/v2/transaction/{id}/confirm  →  Confirms and executes (this endpoint)

Example Request

curl -X PUT https://api.neutron.me/api/v2/transaction/5e25d2f4-9bca-4b7a-a1ad-2cf056100cb6/confirm \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN"

No request body is needed — just the transaction ID in the URL.

What Happens After Confirmation

Error Cases

Example error (already in final state):

{
  "resultStatus": "error",
  "code": "2005",
  "error": "transaction 5e25d2f4-... already in final state usercanceled",
  "errorMetadata": {
    "params": "{\"State\":\"usercanceled\",\"TxnID\":\"5e25d2f4-...\"}"
  }
}

Important Notes

• Quoted transactions have an expiry time — confirm before it expires or the transaction moves to expired state
• Review the fxRate and fee breakdown from the create response before confirming
• Confirmation is irreversible for most transaction types (especially Lightning and on-chain sends)
• If you don't want to proceed, use Cancel instead

Related

• Create a transaction — Step 1: create the transaction
• Cancel a transaction — Cancel instead of confirming
• Transaction Status Types — What happens after confirmation