获取兑换待签名 PSBT

获取兑换待签名 PSBT

预兑换请求成功，获取待签名 PSBT。其中，部分请求参数为预兑换返回结果。

POST /brc20swap/get_swap_psbt

请求参数

export interface SwapPsbtBody {
  send_coin_type: string;
  send_tick: string;
  send_amount: string;
  receive_coin_type: string;
  receive_tick: string;
  receive_amount: string;
  address: string;
  btc_address: string;
  slipper: string;
  fee_rate: number;
  ins: string[];
  user_public_key: string;
  tx_size: number;
  checksum: number; // 预请求接口返回，这个字段注意，get_swap_psbt_txsize拿到的是check_sum，这边需要使用checksum
  vins: string[]; // 预请求接口返回
  usr_cnt: number;
}

测试参数

{
    "receive_amount": "864",
    "receive_coin_type": "btc",
    "receive_tick": "BTC",
    "send_amount": "100",
    "send_coin_type": "brc20",
    "send_tick": "bqbq",
    "slipper": 9,
    "fee_rate": 11,
    "ins": [
        "22d16b84841c73a8e44db501b3e397aa6031e8a6e7092e2165e588c389ff9e8ci0"
    ],
    "user_public_key": "02d3ac7452920b1cc4653516dd4f4381a2df0a8c0aac6e3446e633a73ea63eee81",
    "address": "tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e",
    "btc_address": "tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e",
    "tx_size": 353,
    "usr_cnt": 1,
    "vins": [
        "08df53b3c53cdf63e25024660f51c4f399b1de0539cfb29a6107202d387bf3ca:2",
        "8c7109a72c63d6b8aefae3e1a9e4418a68610ec65b3f48b1cf035017299ec18a:1"
    ],
    "checksum": "04ED4405DE7B5362B069759FCEA672B0"
}

cURL示例

curl 'https://test-api-proxy.ddpurse.com/brc20swap/get_swap_psbt' \
  -H 'Accept: application/json, text/plain, */*' \
  -H 'Accept-Language: en' \
  -H 'Cache-Control: no-cache' \
  -H 'Connection: keep-alive' \
  -H 'Content-Type: application/json' \
  -H 'Origin: http://localhost:56651' \
  -H 'Pragma: no-cache' \
  -H 'Referer: http://localhost:56651/' \
  -H 'Sec-Fetch-Dest: empty' \
  -H 'Sec-Fetch-Mode: cors' \
  -H 'Sec-Fetch-Site: cross-site' \
  -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36' \
  -H 'sec-ch-ua: "Not_A Brand";v="8", "Chromium";v="120", "Google Chrome";v="120"' \
  -H 'sec-ch-ua-mobile: ?0' \
  -H 'sec-ch-ua-platform: "macOS"' \
  --data-raw '{"receive_amount":"864","receive_coin_type":"btc","receive_tick":"BTC","send_amount":"100","send_coin_type":"brc20","send_tick":"bqbq","slipper":9,"fee_rate":11,"ins":["22d16b84841c73a8e44db501b3e397aa6031e8a6e7092e2165e588c389ff9e8ci0"],"user_public_key":"02d3ac7452920b1cc4653516dd4f4381a2df0a8c0aac6e3446e633a73ea63eee81","address":"tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e","btc_address":"tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e","tx_size":353,"usr_cnt":1,"vins":["08df53b3c53cdf63e25024660f51c4f399b1de0539cfb29a6107202d387bf3ca:2","8c7109a72c63d6b8aefae3e1a9e4418a68610ec65b3f48b1cf035017299ec18a:1"],"checksum":"04ED4405DE7B5362B069759FCEA672B0"}' \
  --compressed

1、获取到待签名 PSBT 之后，用户必须在 30 秒内签名

2、注意 checksum 字段，值是从上个接口获取，但是字段名称有差异

1、获取到待签名 PSBT 之后，用户必须在 30 秒内签名

2、btc_address 和 address 传同一个地址即可

3、user_public_key 传参方法为只有一个地址的钱包 public_key:public_key，有两个地址的钱包 btc_public_key:ordi_public_key