Create an On-chain Payment

POST /payments

MixPay also supports on-chain wallet payments.

Endpoint URL

https://api.mixpay.me/v1/payments

Parameters

Param	Optional	Type	Description
`payeeId`	*required	String	Account ID for receiving money, pls see Three types of account and How to get payeeId .
`orderId`	*required if no `traceId`	String	Unique in your system. String lengths between 6-36 must be letters, numbers, dashes and underscores and NOT space. `orderId` and `payeeId` make a payment unique.
`paymentAssetId`	*required	String	`assetId` of payment cryptocurrency.
`settlementAssetId`	*required	String	`assetId` of settlement cryptocurrency. Settlement assets you prefer. But you need to pay attention to the `strictMode` field.
`strictMode`	optional	Boolean	Default `false`. `true` means that the payment must be settled strictly according to the currency set by settlementAssetId. See here for more details.
`quoteAmount`	*required	Numeric	Corresponding to the amount of quoteAssetId. For example, the current commodity value is 10 USDT
`quoteAssetId`	*required	String	`assetId` of quote cryptocurrency.
`isChain`	*required	Boolean	Whether is an on-chain payment or not. `true` is using on-chain payment, `false` means pay using Mixin App.
`traceId`	optional	String	UUID, used to prevent double payment and checking the payment result. You should use `orderId` instead.
`clientId`	optional	String	UUID of client of the payment.
`paymentAmount`	optional	String	The `quoteAmount` parameter is invalid when `paymentAmount` is not null.
`remark`	optional	String	maximum 50. Payment remark viewable by the payer.
`note`	optional	String	maximum 50. Payment note viewable by the payer.
`settlementMemo`	optional	String	maximum 200. A memo is similar to Mixin Snapshots, this parameter you can customize.
`returnTo`	optional	String	After successful payment, the URL page will want to redirect to. Useful when you are in a browser JavaScript environment.
`failedReturnTo`	optional	String	After payment failure, the URL page will want to redirect to. Useful when you are in a browser JavaScript environment.
`callbackUrl`	optional	String	After payment successfully, MixPay will issue a POST request to this URL on our server-side. For security reasons, URLs only support HTTPS and has to be URL encoded . Please refer to Payment Callback .
`expiredTimestamp`	optional	int	Set a expired timestamp . This value must be greater than 10s and less than 240min. After this period, the payment result status field will be marked as `failed`, and the `failureReason` will be `Payment overtime`. If you are not setting this value, the payer can have unlimited time to complete this payment.

INFO

settlementMemo parameter explanations: If you use Mixin API like GET /snapshots , you can find the memo in this response. This memo is the settlementMemo set by you. If you don't use this parameter, the specification of the memo can be found here .

Example request - Create On-chain Payment

curl -i -X POST https://api.mixpay.me/v1/payments \
  -d "payeeId"="a0d7791408776b47eb1dd3f94ed15d6a" \
  -d "paymentAssetId"="c6d0c728-2624-429b-8e0d-d9d19b6592fa" \
  -d "settlementAssetId"="c6d0c728-2624-429b-8e0d-d9d19b6592fa" \
  -d "quoteAssetId"="usd" \
  -d "quoteAmount"="10" \
  -d "isChain"=1

Response

{
  "code":0,
  "success":true,
  "message":"",
  "data":{
    "isChain":true,
    // Payment expiration time
    "expire":1647179141,
    "seconds":600,
    "payeeId":"834c17e1-1427-434a-a280-1b3cfee05111",
    // The trace id when the user pays, to get the result of payment
    "traceId":"1b638d3f-e156-4621-87fd-778a410f4884",
    "clientId":"8f263764-3103-4be2-aff1-0530d6976e86",
    "paymentAssetId":"c6d0c728-2624-429b-8e0d-d9d19b6592fa",
    "settlementAssetId":"eea900a8-b327-488c-8d8d-1428702fe240",
    "quoteAssetId":"4d8c508b-91c5-375b-92b0-ee702ed2dac5",
    // The amount of assets to be paid by payer
    "paymentAmount":"0.00025836",
    "quoteAmount":"10",
    "estimatedSettlementAmount":"2.06515747",
    "memo":"",
    "recipient":"",
    "settlementAssetSymbol":"MOB",
    "paymentAssetSymbol":"BTC",
    "quoteAssetSymbol":"USDT",
    // Wallet Address for recive money
    "destination":"1NohyFdBUZ4g3ZNBoe9FL16poBUveXXf3e",
    // tag,
    "tag":""
  },
  "timestampMs":1648190663161
}

Collect the money

Please refer to Pay using an on-chain Wallet .

Expiration

When is a MixPay payment expired? Please refer to Expiration .