getEvmAddress

Derives the EIP-55 checksummed EVM address for a secp256k1 public key: keccak-256 over the uncompressed key’s coordinates, last 20 bytes, mixed-case checksum.

Import

import { 
function getEvmAddress(publicKey: Uint8Array): EvmAddress
Derives the EIP-55 checksummed EVM address for a secp256k1 public key.
@param ― publicKey - A compressed or uncompressed secp256k1 public key.
@returns ― The EIP-55 mixed-case checksummed EVM address.
@throws ― MeraError with code INPUT_INVALID when publicKey is not valid secp256k1.
getEvmAddress } from "@category-labs/mera";

Usage

import {
  
function createSecp256k1SigningSession({ privateKey, }: CreateSigningSessionOptions): Secp256k1SigningSession
Creates a signing session from a secp256k1 private key.
@param ― options - Signing session inputs.
@returns ― A live secp256k1 signing session.
@throws ― MeraError with code INPUT_INVALID when privateKey is not a valid secp256k1 scalar.
createSecp256k1SigningSession,
  
function getEvmAddress(publicKey: Uint8Array): EvmAddress
Derives the EIP-55 checksummed EVM address for a secp256k1 public key.
@param ― publicKey - A compressed or uncompressed secp256k1 public key.
@returns ― The EIP-55 mixed-case checksummed EVM address.
@throws ― MeraError with code INPUT_INVALID when publicKey is not valid secp256k1.
getEvmAddress,
} from "@category-labs/mera";

const 
const session: Secp256k1SigningSession
session = 
function createSecp256k1SigningSession({ privateKey, }: CreateSigningSessionOptions): Secp256k1SigningSession
Creates a signing session from a secp256k1 private key.
@param ― options - Signing session inputs.
@returns ― A live secp256k1 signing session.
@throws ― MeraError with code INPUT_INVALID when privateKey is not a valid secp256k1 scalar.
createSecp256k1SigningSession({
  
privateKey: Uint8Array<ArrayBufferLike>
Curve private key. Must be exactly 32 bytes and, for secp256k1, a valid
scalar.
privateKey: 
var crypto: Crypto
MDN Reference
crypto.
Crypto.getRandomValues<Uint8Array<ArrayBuffer>>(array: Uint8Array<ArrayBuffer>): Uint8Array<ArrayBuffer>
The Crypto.getRandomValues() method lets you get cryptographically strong random values.
MDN Reference
getRandomValues(new 
var Uint8Array: Uint8ArrayConstructor
new (length: number) => Uint8Array<ArrayBuffer> (+6 overloads)
Uint8Array(32)),
});

const 
const address: `0x${string}`
address = 
function getEvmAddress(publicKey: Uint8Array): EvmAddress
Derives the EIP-55 checksummed EVM address for a secp256k1 public key.
@param ― publicKey - A compressed or uncompressed secp256k1 public key.
@returns ― The EIP-55 mixed-case checksummed EVM address.
@throws ― MeraError with code INPUT_INVALID when publicKey is not valid secp256k1.
getEvmAddress(
const session: Secp256k1SigningSession
session.
publicKey: Uint8Array<ArrayBuffer>
65-byte uncompressed secp256k1 public key for the session.
publicKey);
// EIP-55 checksummed, like "0x8ba1f109551bD432803012645Ac136ddd64DBA72"

Parameters

publicKey

Type: Uint8Array
Required

A secp256k1 public key, compressed (33 bytes) or uncompressed (65 bytes). Normalized internally, so both forms give the same address.

Returns

import type { 
type EvmAddress = `0x${string}`
A 20-byte EVM address as 0x-prefixed hex.
Structural type only: the 0x${string} shape does not constrain length or
hex digits.
EvmAddress } from "@category-labs/mera";

type 
type ReturnType = `0x${string}`
ReturnType = 
type EvmAddress = `0x${string}`
A 20-byte EVM address as 0x-prefixed hex.
Structural type only: the 0x${string} shape does not constrain length or
hex digits.
EvmAddress;

The EIP-55 mixed-case checksummed address as a 0x-prefixed string. EvmAddress is the structural type `0x${string}`.

Errors

INPUT_INVALID: publicKey is not valid secp256k1 (wrong length, wrong prefix, or not a point on the curve).