39 lines
1.3 KiB
TypeScript
39 lines
1.3 KiB
TypeScript
import { getAddress } from "../address/index.js";
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import { keccak256 } from "../crypto/index.js";
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import { recoverAddress } from "../transaction/index.js";
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import {
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assertArgument, concat, encodeRlp, toBeArray
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} from "../utils/index.js";
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import type { Addressable } from "../address/index.js";
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import type { SignatureLike } from "../crypto/index.js";
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import type { BigNumberish, Numeric } from "../utils/index.js";
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export interface AuthorizationRequest {
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address: string | Addressable;
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nonce?: Numeric;
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chainId?: BigNumberish;
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}
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/**
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* Computes the [[link-eip-7702]] authorization digest to sign.
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*/
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export function hashAuthorization(auth: AuthorizationRequest): string {
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assertArgument(typeof(auth.address) === "string", "invalid address for hashAuthorization", "auth.address", auth);
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return keccak256(concat([
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"0x05", encodeRlp([
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(auth.chainId != null) ? toBeArray(auth.chainId): "0x",
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getAddress(auth.address),
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(auth.nonce != null) ? toBeArray(auth.nonce): "0x",
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])
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]));
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}
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/**
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* Return the address of the private key that produced
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* the signature %%sig%% during signing for %%message%%.
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*/
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export function verifyAuthorization(auth: AuthorizationRequest, sig: SignatureLike): string {
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return recoverAddress(hashAuthorization(auth), sig);
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}
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