Pre-Swap Request

When selecting a token pair and clicking swap, if it is a BRC20 token, a pre-swap request is required.

POST /brc20swap/get_swap_psbt_txsize

Parameters

export interface SwapPsbtTxsizeBody {
  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; // 最大值为12
  fee_rate: number;
  ins: string[]; //铭文块id即inscription_id数组。当使用btc兑换brc20代币时，直接给空数据即可
}

Request Body

// btc-brc20
{
    "receive_amount": "941.34826088",
    "receive_coin_type": "brc20",
    "receive_tick": "yydd",
    "send_amount": "1000",
    "send_coin_type": "btc",
    "send_tick": "BTC",
    "slipper": 9,
    "fee_rate": 11,
    "ins": [],
    "address": "tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e",
    "btc_address": "tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e"
}

Request Body 2

// brc20-btc
{
    "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"
    ],
    "address": "tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e",
    "btc_address": "tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e"
}

cURL Example 1

# btc-brc20
curl 'https://test-api-proxy.ddpurse.com/brc20swap/get_swap_psbt_txsize' \
  -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":"941.34826088","receive_coin_type":"brc20","receive_tick":"yydd","send_amount":"1000","send_coin_type":"btc","send_tick":"BTC","slipper":9,"fee_rate":11,"ins":[],"address":"tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e","btc_address":"tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e"}' \
  --compressed

cURL Example 2

# brc20-btc
curl 'https://test-api-proxy.ddpurse.com/brc20swap/get_swap_psbt_txsize' \
  -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"],"address":"tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e","btc_address":"tb1qge80xavle7c7k0tk7vceaavwcgpsr3jchl0w3e"}' \
  --compressed

1. Use the same address for both address and btc_address.

2. The response from this endpoint should be passed as is to the get_swap_psbt endpoint.

3. The current slipper (slippage) limit is 12%.