Solana

Onchain deposite & apply on solana

Token Support

Currently cardFi support follow tokens on solana chains

Name	Mint	Vault	Vault Token Account
USDT	Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB	EKpdNp4X8uw3267qZCCBs3WuBYPW3vBnbC1x5gnGSv2K	34uXzajC7JSwNc1ogiPqQPQ9FCw3FJVNSoSneUwhY4xc

Deposit Rules

You can deposit asserts to any card on CardFi system with follow rules :

1. Create a new transaction

2. Add a USDT SPL-transfer transaction

3. Add a MEMO-transaction using splMemo . Input the user_card_id you wants to deposit with base64 string .

4. Send out the transaction and wait for callback .

Deposit Example [Node.js]

const web3 = require('@solana/web3.js');
const splToken = require('@solana/spl-token');
const splMemo = require('@solana/spl-memo');
const b58 = require("b58")
const secretKey = b58.decode("");
const payer = web3.Keypair.fromSecretKey(secretKey);
const connection = new web3.Connection(web3.clusterApiUrl('mainnet-beta'), 'confirmed');
const recipientAddress = new web3.PublicKey('EKpdNp4X8uw3267qZCCBs3WuBYPW3vBnbC1x5gnGSv2K');
const USDT_MINT = new web3.PublicKey('Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB');

async function main() {
  const fromTokenAccount = await splToken.getAssociatedTokenAddress(
    USDT_MINT,
    payer.publicKey
  );
  const toTokenAccount = await splToken.getAssociatedTokenAddress(
    USDT_MINT,
    recipientAddress
  );
  const transferIx = splToken.createTransferInstruction(
    fromTokenAccount,
    toTokenAccount,
    payer.publicKey,
    0.3 * 10 ** 6 
  );

  const memoIx = splMemo.createMemoInstruction(Buffer.from("15_1_0").toString("base64"), [payer.publicKey]); //user_card_id Here .
  const tx = new web3.Transaction().add(transferIx, memoIx);
  const sig = await web3.sendAndConfirmTransaction(connection, tx, [payer]);

  console.log('✅ Transaction sent:', sig);
}

main().catch(console.error);