util

convertRecoveryToV()

convertRecoveryToV(recovery: number, txData: any): Buffer | BN

Convert a recovery parameter (0/1) to the proper v value format based on transaction type. Consolidates the v parameter conversion logic used across ethereum.ts and util.ts.

Parameters

Parameter	Type	Description
recovery	number	Recovery parameter (0 or 1)
txData	any	Transaction data containing chainId, useEIP155, and type

Returns

Buffer | BN

The properly formatted v value as Buffer or BN

Source

src/util.ts:878

---

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

src/util.ts:628

---

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

src/util.ts:705

---

getV()

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

Get the v component of signature using viem parsing.

Parameters

Parameter	Type	Description
tx	any	Serialized transaction (Buffer or hex string)
resp	any	Lattice response with sig and pubkey

Returns

BN

BN object containing the v param

Source

src/util.ts:732

---

getYParity()

getYParity(messageHash: any, signature?: any, publicKey?: string | Buffer | Uint8Array): number

Get the y-parity value for a signature by recovering the public key.

Usage:

• Simple: getYParity(messageHash, signature, publicKey)
• Object: getYParity({ messageHash, signature, publicKey })
• Legacy: getYParity(tx, response)

Parameters

Parameter	Type	Description
messageHash	any	The 32-byte message hash (or tx object for legacy)
signature?	any	Object with r and s values
publicKey?	string | Buffer | Uint8Array	Expected public key

Returns

number

0 or 1 for the y-parity value

Source

src/util.ts:921

---

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

src/util.ts:392