util

fetchCalldataDecoder()

fetchCalldataDecoder(_data: string | Uint8Array, to: string, _chainId: string | number, recurse: boolean): Promise<{"abi": any;"def": Buffer; }>

Fetches calldata from a remote scanner based on the transaction's chainId

Parameters

Parameter	Type	Default value
_data	string | Uint8Array	undefined
to	string	undefined
_chainId	string | number	undefined
recurse	boolean	true

Returns

Promise<{"abi": any;"def": Buffer; }>

Member	Type	Value
abi	any	-
def	Buffer	...

Source

util.ts:582

---

generateAppSecret()

generateAppSecret(deviceId: string | Buffer, password: string | Buffer, appName: string | Buffer): Buffer

Generates an application secret for use in maintaining connection to device.

Parameters

Parameter	Type	Description
deviceId	string | Buffer	The device ID of the device you want to generate a token for.
password	string | Buffer	The password entered when connecting to the device.
appName	string | Buffer	The name of the application.

Returns

Buffer

an application secret as a Buffer

Source

util.ts:654

---

getV()

getV(tx: any, resp: any): any

Generic signing does not return a v value like legacy ETH signing requests did. Get the v component of the signature as well as an initV parameter, which is what you need to use to re-create an @ethereumjs/tx object. There is a lot of tech debt in @ethereumjs/tx which also inherits the tech debt of ethereumjs-util.

1. The legacy Transaction type can call _processSignature with the regular v value.
2. Newer transaction types such as FeeMarketEIP1559Transaction will subtract 27 from the v that gets passed in, so we need to add 27 to create initV

Parameters

Parameter	Type	Description
tx	any	An @ethereumjs/tx Transaction object or Buffer (serialized tx)
resp	any	response from Lattice. Can be either legacy or generic signing variety

Returns

any

bn.js BN object containing the v param

Source

util.ts:689

---

selectDefFrom4byteABI()

selectDefFrom4byteABI(abiData: any[], selector: string): any

Takes a list of ABI data objects and a selector, and returns the earliest ABI data object that matches the selector.

Parameters

Parameter	Type
abiData	any[]
selector	string

Returns

any

Source

util.ts:362