eth_getBalance

Returns the balance of the account of the given address.

Parameters:

DATA, 20 Bytes - address to check for balance.

QUANTITY|TAG - integer block number, or the string "latest"

Returns:

QUANTITY - integer of the current balance in wei.

Example:

// Request
curl https://optimism.blockpi.network/v1/rpc/your-rpc-key -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "latest"],"id":1}'

// Result
{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x0"
}