Creating Wallets

In order to get wallets, please ensure that you have registered and installed the Caishen SDK.

With the Caishen SDK, you can create wallets for:

• EVM

• Bitcoin

• Solana

• SUI

• XRP

All Caishen wallets come with support for crosschain swaps and sending

It's this easy to create your multichain wallets

🔍 Get Wallet Info

⚠️ The privateKey is only returned if allowPrivateKeyAccess is enabled in your developer dashboard. You do not need to send the private key back to the server. All you need is { account, chainType }.

📥 Parameters

Name	Type	Required	Description
chainType	string	✅	Blockchain type (ETHEREUM, SOLANA, etc.)
chainId	number	❌	Optional chain ID (e.g., 1 for Ethereum)
account	number	✅	Account index or identifier

✅ Supported chainTypes:

• BITCOIN, SOLANA, ETHEREUM, SUI, APTOS, TON

• TRON, NEAR, XRP, CARDANO, COSMOS

---

📘 Example

const wallet = await sdk.crypto.getWallet({
  chainType: 'ETHEREUM',
  chainId: 1,
  account: 0,
});

📚 Type: IWalletAccount

interface IWalletAccount {
  address: string;
  chainType: string;
  account: number;
  publicKey: string;
  privateKey?: string; // Only returned if access is enabled in the dashboard
}

Copy your Project Key

Example 1: Creating Wallets on EVM, Bitcoin, Solana, SUI & XRP

const { CaishenSDK } = require('@caishen/sdk');
const jwt = require('jsonwebtoken');
require('dotenv').config();

// 👤 One user
const userId = 'user-123'; // You can change this

// 🌐 Supported chains
const chains = [
  { name: 'Ethereum', chainType: 'ETHEREUM', chainId: 1 },
  { name: 'Solana', chainType: 'SOLANA', chainId: 101 },
  { name: 'Bitcoin', chainType: 'BITCOIN', chainId: 0 },
  { name: 'Sui', chainType: 'SUI', chainId: 1 },
  { name: 'XRP', chainType: 'XRP', chainId: 1 },
];

(async () => {
  try {
    const token = jwt.sign({ id: userId }, process.env.CAISHEN_PROJECT_SECRET);

    const sdk = new CaishenSDK({ projectKey: process.env.CAISHEN_PROJECT_KEY });
    await sdk.connectAsUser({
      provider: 'custom',
      token,
    });

    console.log(`✅ Connected as ${userId}\n`);

    for (const chain of chains) {
      try {
        const wallet = await sdk.crypto.getWallet({
          chainType: chain.chainType,
          chainId: chain.chainId,
          account: 0,
        });
        console.log(`✅ ${chain.name} Wallet:\n`, wallet, '\n');
      } catch (err) {
        console.error(`❌ Failed to create ${chain.name} wallet: ${err.message}\n`);
      }
    }
  } catch (err) {
    console.error('❌ Failed to connect user:', err.message);
  }
})();

Example 2: Creating Multiple Wallets for a Single User

const { CaishenSDK } = require('@caishen/sdk');
const jwt = require('jsonwebtoken');
require('dotenv').config();

// 👤 One user ID
const userId = 'user-123';

(async () => {
  try {
    // 🔐 Create JWT for this user
    const token = jwt.sign({ id: userId }, process.env.CAISHEN_PROJECT_SECRET);

    // 🔌 Create SDK instance + connect as user once
    const sdk = new CaishenSDK({ projectKey: process.env.CAISHEN_PROJECT_KEY });
    await sdk.connectAsUser({
      provider: 'custom',
      token,
    });

    // 🔁 Create 10 wallets (account 0 → 9)
    for (let i = 0; i < 10; i++) {
      try {
        const wallet = await sdk.crypto.getWallet({
          chainType: 'ETHEREUM',
          chainId: 1,
          account: i,
        });
        console.log(`✅ Wallet #${i} for ${userId}:`, wallet);
      } catch (err) {
        console.error(`❌ Failed to create wallet #${i}:`, err.message);
      }
    }
  } catch (err) {
    console.error(`❌ Failed to connect user:`, err.message);
  }
})();

Example 3: Creating EVM Wallets for 10 Users

const { CaishenSDK } = require('@caishen/sdk');
const jwt = require('jsonwebtoken');
require('dotenv').config();

// 🔁 Generate 10 user IDs
const users = Array.from({ length: 10 }, (_, i) => `user-${i + 1}`);

(async () => {
  for (const userId of users) {
    // Wrap the logic inside a try/catch for this user
    try {
      // 🔐 Create JWT
      const token = jwt.sign({ id: userId }, process.env.CAISHEN_PROJECT_SECRET);

      // 🆕 New SDK instance for each user
      const sdk = new CaishenSDK({ projectKey: process.env.CAISHEN_PROJECT_KEY });

      // 🚪 Connect user
      await sdk.connectAsUser({
        provider: 'custom',
        token,
      });

      // 👛 Create Ethereum wallet
      const wallet = await sdk.crypto.getWallet({
        chainType: 'ETHEREUM',
        chainId: 1,
        account: 0,
      });

      console.log(`✅ Wallet for ${userId}:`);
      console.log(`   Address: ${wallet.address}`);
      console.log(`   Public Key: ${wallet.publicKey}\n`);

    } catch (err) {
      console.error(`❌ Failed for ${userId}: ${err.message}\n`);
    }
  }
})();

Example 4: Creating EVM Wallets for 10 Users

const { CaishenSDK } = require('@caishen/sdk');
const jwt = require('jsonwebtoken');
require('dotenv').config();

// 🔁 Generate 10 user IDs
const users = Array.from({ length: 10 }, (_, i) => `user-${i + 1}`);

(async () => {
  for (const userId of users) {
    // Wrap the logic inside a try/catch for this user
    try {
      // 🔐 Create JWT
      const token = jwt.sign({ id: userId }, process.env.CAISHEN_PROJECT_SECRET);

      // 🆕 New SDK instance for each user
      const sdk = new CaishenSDK({ projectKey: process.env.CAISHEN_PROJECT_KEY });

      // 🚪 Connect user
      await sdk.connectAsUser({
        provider: 'custom',
        token,
      });

      // 👛 Create Ethereum wallet
      const wallet = await sdk.crypto.getWallet({
        chainType: 'ETHEREUM',
        chainId: 1,
        account: 0,
      });

      console.log(`✅ Wallet for ${userId}:`);
      console.log(`   Address: ${wallet.address}`);
      console.log(`   Public Key: ${wallet.publicKey}\n`);

    } catch (err) {
      console.error(`❌ Failed for ${userId}: ${err.message}\n`);
    }
  }
})();

Example 5: Creating Wallets on EVM, Bitcoin, Solana, SUI & XRP for 10 Users

const { CaishenSDK } = require('@caishen/sdk');
const jwt = require('jsonwebtoken');
require('dotenv').config();

// 🔁 10 users
const users = Array.from({ length: 10 }, (_, i) => `user-${i + 1}`);

// 🌐 Chain setup
const chains = [
  { name: 'Ethereum', chainType: 'ETHEREUM', chainId: 1 },
  { name: 'Solana', chainType: 'SOLANA', chainId: 101 },
  { name: 'Bitcoin', chainType: 'BITCOIN', chainId: 0 },
  { name: 'Sui', chainType: 'SUI', chainId: 1 },
  { name: 'XRP', chainType: 'XRP', chainId: 1 },
];

(async () => {
  for (const userId of users) {
    try {
      const token = jwt.sign({ id: userId }, process.env.CAISHEN_PROJECT_SECRET);
      const sdk = new CaishenSDK({ projectKey: process.env.CAISHEN_PROJECT_KEY });

      await sdk.connectAsUser({
        provider: 'custom',
        token,
      });

      console.log(`\n🧑 Creating wallets for ${userId}`);

      for (const chain of chains) {
        try {
          const wallet = await sdk.crypto.getWallet({
            chainType: chain.chainType,
            chainId: chain.chainId,
            account: 0,
          });

          console.log(`✅ ${chain.name} Wallet`);
          console.log(`   Address: ${wallet.address}`);
          console.log(`   Public Key: ${wallet.publicKey}\n`);
        } catch (err) {
          console.error(`❌ Failed to create ${chain.name} wallet for ${userId}: ${err.message}`);
        }
      }

    } catch (err) {
      console.error(`❌ Failed to connect ${userId}: ${err.message}`);
    }
  }
})();

Minimal WalletInput

interface MinimalWalletInput {
  account: number;
  chainType: string;
  address: string;
}

Used for all cash and swap functions to avoid sending sensitive data.

---

💸 Token Operations

🚫 Use MinimalWalletInput when possible to reduce sensitive data exposure.

➕ Send Token

const txHash = await sdk.crypto.send({
  wallet,
  payload: {
    token: '0xTokenAddress...', // omit for native
    amount: '0.5',
    toAddress: '0xRecipient...',
  },
});

📊 Get Balance

const native = await sdk.crypto.getBalance({ wallet, payload: {} });
const dai = await sdk.crypto.getBalance({
  wallet,
  payload: { token: '0x6B1754...' },
});

---

🔁 Token Swap

🚫 Do not send the full wallet object. Use only { account, chainType }.

🔍 Get Swap Route

const route = await sdk.crypto.getSwapRoute({
  wallet: { account: 0 },
  payload: {
    amount: '1000000000000000000',
    from: { tokenAddress: '0x...', chainType: 'ETHEREUM' },
    to: { tokenAddress: '0x...', chainType: 'ETHEREUM' },
  },
});

🔄 Execute Swap

const result = await sdk.crypto.swap({
  wallet: { account: 0, chainType: 'ETHEREUM' },
  payload: { confirmationCode: 'abc123' },
});