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ERC20

ERC20 resource provides convenient operations for interacting with ERC20 token contracts without manually specifying ABIs.

Overview​

ERC20 is the most common token standard on Ethereum. This resource automatically handles the ERC20 ABI, making it easy to interact with any ERC20 token.

Common ERC20 Tokens:

  • USDT (Tether)
  • USDC (USD Coin)
  • DAI (Dai Stablecoin)
  • WETH (Wrapped Ether)
  • And thousands more...

Operations​

Get Balance​

Get the token balance of an address.

Required Credentials: Ethereum RPC

Parameters:

  • Token Address (required): The ERC20 token contract address
  • Owner Address (required): Address to check balance for
  • Format Decimals (optional): Format output using token decimals (default: true)

Example:

{
  "tokenAddress": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "ownerAddress": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
  "formatDecimals": true
}

Output:

{
  "balance": "1000.50",
  "decimals": 6,
  "rawBalance": "1000500000"
}

Transfer​

Transfer tokens to another address.

Required Credentials: Ethereum RPC, Ethereum Account

Parameters:

  • Token Address (required): The ERC20 token contract address
  • To (required): Recipient address
  • Amount (required): Amount to transfer (in token units, will be converted using decimals)

Example:

{
  "tokenAddress": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "to": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
  "amount": "100.5"
}

Output:

{
  "hash": "0x1234567890abcdef...",
  "from": "0xYourAddress...",
  "to": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
}

Approve​

Approve another address to spend tokens on your behalf.

Required Credentials: Ethereum RPC, Ethereum Account

Parameters:

  • Token Address (required): The ERC20 token contract address
  • Spender (required): Address to approve
  • Amount (required): Amount to approve (use "unlimited" for max approval)

Use Cases:

  • Approve DEX contracts to swap tokens
  • Approve staking contracts to deposit tokens
  • Set spending limits for contracts

Example:

{
  "tokenAddress": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "spender": "0x1111111254fb6c44bAC0beD2854e76F90643097d",
  "amount": "unlimited"
}

Output:

{
  "hash": "0x1234567890abcdef...",
  "from": "0xYourAddress...",
  "to": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
}

Transfer From​

Transfer tokens using an allowance (requires prior approval).

Required Credentials: Ethereum RPC, Ethereum Account

Parameters:

  • Token Address (required): The ERC20 token contract address
  • From (required): Address to transfer from
  • To (required): Recipient address
  • Amount (required): Amount to transfer

Use Cases:

  • Pull payments
  • Contract-based token transfers
  • Automated payment systems

Example:

{
  "tokenAddress": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "from": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
  "to": "0x1111111254fb6c44bAC0beD2854e76F90643097d",
  "amount": "100.5"
}

Output:

{
  "hash": "0x1234567890abcdef...",
  "from": "0xYourAddress...",
  "to": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
}

Get Allowance​

Check how much a spender is allowed to spend on behalf of an owner.

Required Credentials: Ethereum RPC

Parameters:

  • Token Address (required): The ERC20 token contract address
  • Owner (required): Token owner address
  • Spender (required): Spender address
  • Format Decimals (optional): Format output using token decimals

Example:

{
  "tokenAddress": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "owner": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb",
  "spender": "0x1111111254fb6c44bAC0beD2854e76F90643097d"
}

Output:

{
  "allowance": "1000000.0",
  "decimals": 6,
  "rawAllowance": "1000000000000"
}

Get Total Supply​

Get the total supply of tokens.

Required Credentials: Ethereum RPC

Parameters:

  • Token Address (required): The ERC20 token contract address
  • Format Decimals (optional): Format output using token decimals

Example:

{
  "tokenAddress": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
  "formatDecimals": true
}

Output:

{
  "totalSupply": "42000000000.0",
  "decimals": 6,
  "rawTotalSupply": "42000000000000000"
}

Get Decimals​

Get the number of decimals the token uses.

Required Credentials: Ethereum RPC

Parameters:

  • Token Address (required): The ERC20 token contract address

Output:

{
  "decimals": 6
}

Get Name​

Get the token name.

Required Credentials: Ethereum RPC

Parameters:

  • Token Address (required): The ERC20 token contract address

Output:

{
  "name": "USD Coin"
}

Get Symbol​

Get the token symbol.

Required Credentials: Ethereum RPC

Parameters:

  • Token Address (required): The ERC20 token contract address

Output:

{
  "symbol": "USDC"
}

Common Use Cases​

Monitor Token Balance​

[Schedule Trigger] → [ERC20: Get Balance] → [Check Threshold] → [Alert]

Automated Token Transfer​

[Trigger] → [ERC20: Transfer] → [Wait For Transaction] → [Notification]

Approve and Deposit to DeFi​

[Trigger] → [ERC20: Approve] → [Wait] → [Contract: Write - Deposit] → [Wait]

Check Allowance Before Transfer From​

[Trigger] → [ERC20: Get Allowance] → [Conditional] → [ERC20: Transfer From]

Common Token Addresses​

Ethereum Mainnet​

  • USDT: 0xdAC17F958D2ee523a2206206994597C13D831ec7
  • USDC: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
  • DAI: 0x6B175474E89094C44Da98b954EedeAC495271d0F
  • WETH: 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

Polygon​

  • USDT: 0xc2132D05D31c914a87C6611C10748AEb04B58e8F
  • USDC: 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174
  • WMATIC: 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270

Tips​

  • Decimals: Most tokens use 18 decimals, but some (like USDC, USDT) use 6
  • Format Decimals: Enable this to get human-readable amounts
  • Unlimited Approval: Use "unlimited" for amount to approve max uint256
  • Check Balance: Always check balance before transfers
  • Gas Costs: Token transfers cost more gas than ETH transfers
  • Approval Pattern: Most DeFi interactions require approve → interact pattern
  • Token Address: Always verify token addresses on Etherscan or official sources