eth_call | Optimism

The example is a call to the poolinfo of the Gamma MasterChef contract.

Optimism API method eth_call executes a smart contract function call directly and returns the result without requiring a transaction or changing the state on the blockchain. This method is widely used for reading data from smart contracts.

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Parameters

• transactionObject — an object containing transaction parameters, including:
  • to — the address of the contract to call.
  • data — the call data, typically including the function signature and parameters.
• blockParameter — a string specifying the block number (in hexadecimal) or one of the strings "earliest", "latest", or "pending", indicating the blockchain state to use for the call. Most commonly, "latest" is used.

Response

• result — the result of the call, encoded as a hexadecimal string. The format of the result depends on the function called.

Use case

The eth_call method is essential for:

• DApps that need to retrieve state or compute derived values from smart contracts without making a transaction.
• Wallets and interfaces that display contract information, such as token balances or the state of a decentralized finance (DeFi) contract.
• Automated scripts and bots that monitor contract states or conditions on the blockchain.

Try the eth_call RPC method yourself