Utility Operations | Ethereum

Mostly local: only chainId makes an RPC call. Every other operation on this page runs entirely locally against the supplied input — no network round trip.

validateAddress

Field	Type	Required	Description
`address`	text	✓ Yes	Address string to validate.

{
  "success": true,
  "isValid": true,
  "isChecksumValid": true,
  "checksummedAddress": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb"
}

isValid checks basic format (20-byte hex); isChecksumValid checks the EIP-55 mixed-case checksum specifically — an all-lowercase or all-uppercase address is valid format but not checksum-valid.

convertUnits

Field	Type	Required	Description
`value`	text	✓ Yes	Value to convert.
`fromUnit`	text	✓ Yes	Source unit, e.g. `ether`, `gwei`, `wei`.
`toUnit`	text	✓ Yes	Target unit.

{ "success": true, "valueWei": "1500000000000000000", "convertedValue": 1.5, "fromUnit": "ether", "toUnit": "ether" }

Conversion always chains through wei as the common base unit.

chainId — the only RPC call in this resource

eth_chainId. No operation-specific fields.

{ "success": true, "chainID": 1 }

encodeFunctionData / decodeFunctionData

Operation	Fields	Returns
`encodeFunctionData`	`abi`* (JSON), `functionName`*, `args`	`{ "data": "0xa9059cbb...", "selector": "0xa9059cbb" }` — full calldata plus the 4-byte selector.
`decodeFunctionData`	`abi`* (JSON), `data`*	`{ "functionName": "transfer", "selector": "0xa9059cbb", "decodedArgs": {"to":"0x...","amount":"1000000"} }`

Useful for building contract.write/transaction.send calldata ahead of time, or decoding calldata pulled from transaction.get/block.get without making another call.

encodeEventTopics / decodeEventLog

Operation	Fields	Description
`encodeEventTopics`	`eventAbi`* (JSON), `args`	Builds an `eth_getLogs` topics filter array. `topics[0]` is always the event signature hash; later entries are either an encoded filter value or `null` (wildcard).
`decodeEventLog`	`eventAbi`* (JSON), `topics`* (JSON array), `data`*	Turns a raw log entry's topics/data into named event arguments.

{ "success": true, "eventName": "Transfer", "decodedArgs": { "from": "0x0000...", "to": "0x742d35Cc...", "value": "1000000" } }

Load-bearing pair: decodeEventLog is what turns the raw EthereumEventLogEntry objects returned by transaction.receipt and contract.logs into usable, named event data — those two operations deliberately return logs raw/undecoded and expect this pairing.

contractAddress

Predicts a contract's deployment address ahead of (or after) deployment — CREATE via nonce, or CREATE2 via bytecode hash + salt.

Field	Type	Required	Description
`from`	text	✓ Yes	Deployer address.
`nonce`	number	One of nonce / bytecodeHash+salt	Deployer's nonce at time of deployment — for CREATE prediction.
`bytecodeHash`	text	One of nonce / bytecodeHash+salt	Keccak256 hash of the init code — for CREATE2 prediction.
`salt`	text	One of nonce / bytecodeHash+salt	CREATE2 salt value.

{ "success": true, "contractAddress": "0x5FbDB2315678afecb367f032d93F642f64180aa", "method": "CREATE" }