expand.network
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  • ⚙️SDK
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    • Getting Started
  • ⛓️INTEGRATIONS
    • ⚡Blockchains
      • EVM based blockchains
        • Ethereum
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    • ⚡DEX & DEX Aggregators
      • Uniswap V2
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        • Kyberswap ( Limit Order Endpoints )
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    • ⚡Derivatives
      • dYdX V4
    • ⚡Fungible Tokens
      • ERC20
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    • ⚡Lending Protocols
      • Aave V2
      • Aave V3
      • Compound V2
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    • ⚡Liquid Staking
      • Chorus One
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    • ⚡Non Fungible Tokens
      • ERC721
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    • ⚡Stablecoins
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    • ⚡Synthetics
      • Synthetix
    • ⚡Supported Wallets
      • MPC Wallets
        • DFNS
        • FORDEFI
        • FIREBLOCKS
        • CIRCLE
      • HD Wallets
        • PHANTOM
        • COINBASE
        • TON Wallet
      • Wallet Connect v2
  • How To
    • Execute a Local Swap
    • Execute a Cross Chain Swap
    • Use Limit Orders
    • Lend and Borrow
    • Provision Liquidity
      • Adding Liquidity
      • Removing liquidity
    • Yield Farm
    • Use Our Transaction Decoder
    • Submit an RFQ
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    • Stream Data (WebSocket)
      • Stream Transaction
      • Stream Trade
      • Stream Gas
      • Stream Ticker Price
    • Source Pricing
    • Track Memecoins
    • Manage Token Approvals
  • Use Cases
    • Trade Reconciliation
    • Portfolio Management
    • Trading Features
    • On-Chain Data: DEX Liquidity Pool Forensics
    • Transaction and Pool Analysis
  • Account Abstraction
    • Overview
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    • ⚙️SDK - Overview
  • Additional Info
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    • Compute Unit Costs
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    • Audit Certificate
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      • DEX
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  • ID's
    • Chain IDs
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      • Internal Chain IDs for Bridges
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    • Yield Aggregator ID
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  • Mapping
    • Blockchains
    • DEXs
      • Uniswap V2
      • Uniswap V3
      • Sushiswap
      • PancakeSwap
      • Curve
      • Balancer
    • Lending Protocols
      • Aave
      • Compound
  • Protocol Spender
    • Spender list
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On this page
  • Step 1: Installation
  • Step 2: Wallet Initialisation
  • Step 3: Prepare Transaction
  • Step 4: Sign Transaction
  • Step 5: Send Transaction
  • Sample code to approve a fungible token using Circle:
  1. INTEGRATIONS
  2. Supported Wallets
  3. MPC Wallets

CIRCLE

PreviousFIREBLOCKSNextHD Wallets

Last updated 1 year ago

Circle Programmable Wallets is a Wallet as a Service that simplifies creating and managing secure web3 wallets and their private keys. They extend wallet functionality with approachable user flows, provide optionality for developer and user infrastructure solutions, and enable seamless smart contract integration. To use CIRCLE with expand.network , follow these steps:-

Step 1: Installation

User needs to install the expand.network SDK using the following command:

npm i expand-network

Step 2: Wallet Initialisation

async function initcircleWallet(options){
    const userToken = await WalletCircle.getUserToken(options);
    options.userToken = userToken.userToken;
    options.encryptionKey = userToken.encryptionKey;
    const wallet = new WalletCircle(options);
    return wallet;
}

Step 3: Prepare Transaction

// Preparing the approve transaction from expand.network
const prepareApproveTx = await prepareTransaction('https://api.expand.network/fungibletoken/approve', {
        "from": "SENDER_ADDRESS",
        "tokenAddress": "0xdc31Ee1784292379Fbb2964b3B9C4124D8F89C60",
        "to": "RECEIVER_ADDRESS",
        "amount": "10000",
        "gas": "25000",
        "xApiKey": 'YOUR_API_KEY'        //Replace with your API key
    });

Step 4: Sign Transaction

// Sign the transaction locally using sdk client
const signedTx = await wallet.signTransaction(prepareApproveTx);
console.log("signedTx: " ,signedTx);

Step 5: Send Transaction

// Send the signed transaction
const tx = await wallet.sendTransaction(signedTx);
console.log("sent tx: ", tx);

Sample code to approve a fungible token using Circle:

const { WalletCircle, prepareTransaction } = require('expand-network');
async function initcircleWallet(options){
    const userToken = await WalletCircle.getUserToken(options);
    options.userToken = userToken.userToken;
    options.encryptionKey = userToken.encryptionKey;
    const wallet = new WalletCircle(options);
    return wallet;
}
async function main(){
    const wallet = await initcircleWallet({
        appId: "CIRCLE_APP_ID",
        apiKey: 'CIRCLE_API_KEY',
        userId: 'CIRCLE_USER_ID',
        walletId: 'CIRCLE_WALLET_ID',
        encryptionKey: 'CIRCLE_ENCRYPTION_KEY'
    });
    const prepareApproveTx = await prepareTransaction('https://api.expand.network/fungibletoken/approve', {
        "from": "SENDER_ADDRESS",
        "tokenAddress": "0xdc31Ee1784292379Fbb2964b3B9C4124D8F89C60",
        "to": "RECEIVER_ADDRESS",
        "amount": "10000",
        "gas": "25000",
        "xApiKey": 'YOUR_API_KEY'
    });
    const signedTx = await wallet.signTransaction(prepareApproveTx);
    console.log("signedTx: " ,signedTx);
    const tx = await wallet.sendTransaction(signedTx);
    console.log("sent tx: ", tx);
}
main();
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