curl -X POST \
  "https://verilock.io/api/v1/transactions/txn_c4e5f6a7-8b9c-4d0e-a1f2-b3c4d5e6f7a8/decision" \
  -H "Authorization: Bearer qi_live_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "decision": "approve",
    "reason": "Verified sender identity and business relationship with receiver."
  }'

{
  "id": "txn_c4e5f6a7-8b9c-4d0e-a1f2-b3c4d5e6f7a8",
  "decision": "approve",
  "decided_by": "api_key_prod_a1b2c3d4",
  "decided_at": "2026-03-15T16:05:00Z"
}