SpringSui Integration

Links to relevant SpringSui codebase.

Typescript monorepo (frontend, sdk, cli): https://github.com/solendprotocol/springsui

Smart contracts: https://github.com/solendprotocol/liquid-staking

The cli has examples of calling every single instruction in the springsui smart contracts.

Examples

Minting sSui

const LIQUID_STAKING_INFO = {
  id: "0x15eda7330c8f99c30e430b4d82fd7ab2af3ead4ae17046fcb224aa9bad394f6b",
  type: "0x83556891f4a0f233ce7b05cfe7f957d4020492a34f5405b2cb9377d060bef4bf::spring_sui::SPRING_SUI",
  weightHookId:
    "0xbbafcb2d7399c0846f8185da3f273ad5b26b3b35993050affa44cfa890f1f144",
};

const client = new SuiClient({ url: RPC_URL });
const lstClient = await LstClient.initialize(client, LIQUID_STAKING_INFO);

const tx = new Transaction();
const [sui] = tx.splitCoins(tx.gas, [BigInt(options.amount)]);
const sSui = lstClient.mint(tx, sui);
tx.transferObjects([sSui], keypair.toSuiAddress());

const txResponse = await client.signAndExecuteTransaction({
  transaction: tx,
  signer: keypair,
  options: {
    showEvents: true,
    showEffects: true,
    showObjectChanges: true,
  },
});

Redeeming sSui

const LIQUID_STAKING_INFO = {
  id: "0x15eda7330c8f99c30e430b4d82fd7ab2af3ead4ae17046fcb224aa9bad394f6b",
  type: "0x83556891f4a0f233ce7b05cfe7f957d4020492a34f5405b2cb9377d060bef4bf::spring_sui::SPRING_SUI",
  weightHookId:
    "0xbbafcb2d7399c0846f8185da3f273ad5b26b3b35993050affa44cfa890f1f144",
};

const client = new SuiClient({ url: RPC_URL });

const lstCoins = await client.getCoins({
  owner: keypair.toSuiAddress(),
  coinType: LIQUID_STAKING_INFO.type,
  limit: 1000,
});

const tx = new Transaction();
const lstClient = await LstClient.initialize(client, LIQUID_STAKING_INFO);

if (lstCoins.data.length > 1) {
  tx.mergeCoins(
    lstCoins.data[0].coinObjectId,
    lstCoins.data.slice(1).map((c) => c.coinObjectId),
  );
}

const [lst] = tx.splitCoins(lstCoins.data[0].coinObjectId, [
  BigInt(options.amount),
]);
const sui = lstClient.redeemLst(tx, lst);

tx.transferObjects([sui], keypair.toSuiAddress());

const txResponse = await client.signAndExecuteTransaction({
  transaction: tx,
  signer: keypair,
  options: {
    showEvents: true,
    showEffects: true,
    showObjectChanges: true,
  },
});

Get the exchange rate of sSUI/SUI offchain (using the SDK)

import { fetchLiquidStakingInfo } from "@suilend/springsui-sdk";
import BigNumber from "bignumber.js";

const LIQUID_STAKING_INFO = {
  id: "0x15eda7330c8f99c30e430b4d82fd7ab2af3ead4ae17046fcb224aa9bad394f6b",
  type: "0x83556891f4a0f233ce7b05cfe7f957d4020492a34f5405b2cb9377d060bef4bf::spring_sui::SPRING_SUI",
  weightHookId:
    "0xbbafcb2d7399c0846f8185da3f273ad5b26b3b35993050affa44cfa890f1f144",
};

const SUI_DECIMALS = 9;
const SSUI_DECIMALS = 9;

const rawLiquidStakingInfo = await fetchLiquidStakingInfo(
    LIQUID_STAKING_INFO,
    suiClient,
  );

  const totalSuiSupply = new BigNumber(
    rawLiquidStakingInfo.storage.totalSuiSupply.toString(),
  ).div(10 ** SUI_DECIMALS);
  const totalLstSupply = new BigNumber(
    rawLiquidStakingInfo.lstTreasuryCap.totalSupply.value.toString(),
  ).div(10 ** SSUI_DECIMALS);

  const suiToLstExchangeRate = !totalSuiSupply.eq(0)
    ? totalLstSupply.div(totalSuiSupply)
    : new BigNumber(0);

Any other questions? Head to the SpringSui channel on the Suilend Discord.