Get Unsigned Liquidity PSBT

Obtaining an Unsigned PSBT for Adding Liquidity (ARC20)

POST / brc20swap/v2/create_add_liquid_psbt2

Parameters

export interface PoolPsbtBody {
  tick1: string;
  tick2: string;
  coin_type_1: string;
  coin_type_2: string;
  amount_1: string;
  amount_2: string;
  slipper: string;
  payer_ord_addr: string;
  fee_rate: string;
  payer_btc_addr: string;
  payer_pub_key: string;
}

Request Body

{
    "tick1": "3dbb",
    "coin_type_1": "arc20",
    "amount_1": "600",
    "tick2": "BTC",
    "coin_type_2": "btc",
    "amount_2": "113328",
    "fee_rate": "11",
    "slipper": "12",
    "payer_ord_addr": "tb1qlphav0389832xt8deme0hx2unvw3cjt7fsfuyx",
    "payer_btc_addr": "tb1qlphav0389832xt8deme0hx2unvw3cjt7fsfuyx",
    "payer_pub_key": "036d9bb5a5cbf1cfb46c6ec79832a53b4f8717751485abb141ba6d595393200ace:036d9bb5a5cbf1cfb46c6ec79832a53b4f8717751485abb141ba6d595393200ace"
}

cURL Example

curl 'https://test-api-proxy.ddpurse.com/brc20swap/v2/create_add_liquid_psbt2' \
  -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/122.0.0.0 Safari/537.36' \
  -H 'sec-ch-ua: "Chromium";v="122", "Not(A:Brand";v="24", "Google Chrome";v="122"' \
  -H 'sec-ch-ua-mobile: ?0' \
  -H 'sec-ch-ua-platform: "macOS"' \
  --data-raw '{"tick1":"3dbb","coin_type_1":"arc20","amount_1":"600","tick2":"BTC","coin_type_2":"btc","amount_2":"113328","fee_rate":"11","slipper":"12","payer_ord_addr":"tb1qlphav0389832xt8deme0hx2unvw3cjt7fsfuyx","payer_btc_addr":"tb1qlphav0389832xt8deme0hx2unvw3cjt7fsfuyx","payer_pub_key":"036d9bb5a5cbf1cfb46c6ec79832a53b4f8717751485abb141ba6d595393200ace:036d9bb5a5cbf1cfb46c6ec79832a53b4f8717751485abb141ba6d595393200ace"}'

Important Notes

1. Use the same address for both payer_ord_addr and payer_btc_addr.

2. Minimum injection thresholds:

   • BTC: 0.003

   • ARC20: ≥ 546 and must be a positive integer

3. After adding liquidity, the remaining balance of the token in the user's wallet must be either 0 or greater than 546.