payment.processing - WalletConnect Pay Docs

processing is populated from this point on. In this example the buyer pays 10 USDC on Base for a $10.00 payment, a 2.9% fee applies, and the merchant is expected to receive 9.71 USDC. processing.buyer_caip10 is null instead when the payment has no on-chain buyer, and live is false for test-mode payments.

`data.status`	Stage objects populated	Stage objects always `null`
`processing`	`processing`	`success`, `failed`, `cancelled`, `expired`, `settled`

Every field is documented in the event overview.

{
  "id": "evt_fixture_payment_processing",
  "type": "payment.processing",
  "api_version": "2026-05-18",
  "created_at": "2026-06-30T09:59:10.512Z",
  "data": {
    "payment_id": "pay_fixture_01HZX4V9K3T",
    "merchant_id": "merchant_fixture_01HZX4V9K3T",
    "live": true,
    "payment_state_version": 1,
    "reference_id": "order_fixture_1042",
    "status": "processing",
    "amount": {
      "unit": "iso4217/USD",
      "value": "1000"
    },
    "created_at": "2026-06-30T09:59:00.084Z",
    "expires_at": "2026-06-30T10:14:00.000Z",
    "processing": {
      "processing_at": "2026-06-30T09:59:10.512Z",
      "option_amount": {
        "unit": "caip19/eip155:8453/erc20:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "value": "10000000"
      },
      "fee": {
        "kind": "base_plus_percent",
        "base_amount": {
          "unit": "caip19/eip155:8453/erc20:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
          "value": "0"
        },
        "percent": {
          "numerator": "29",
          "denominator": "1000"
        },
        "percent_amount": {
          "unit": "caip19/eip155:8453/erc20:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
          "value": "290000"
        },
        "total_amount": {
          "unit": "caip19/eip155:8453/erc20:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
          "value": "290000"
        }
      },
      "settlement_amount": {
        "unit": "caip19/eip155:8453/erc20:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "value": "9710000"
      },
      "buyer_caip10": "eip155:8453:0x000000000000000000000000000000000000dEaD",
      "chain_caip2": "eip155:8453"
    },
    "success": null,
    "failed": null,
    "cancelled": null,
    "expired": null,
    "settled": null
  }
}