Add MetaMask facilitator addresses as constants in @metamask/smart-accounts-kit/experimental

Author: jeffsmale90

packages/smart-accounts-kit/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Constants `METAMASK_FACILITATOR_ADDRESSES`, `METAMASK_FACILITATOR_ADDRESSES_DEV` added to @metamask/smart-accounts-kit/experimental ([#255](https://github.com/metamask/smart-accounts-kit/pull/255))
+
 ## [1.6.0]
 
 ### Added

packages/smart-accounts-kit/src/experimental/index.ts

@@ -13,4 +13,6 @@ export {
   type x402DelegationProviderPaymentPayload,
   type PaymentRequirements,
   type MaybeDeferred,
+  METAMASK_FACILITATOR_ADDRESSES,
+  METAMASK_FACILITATOR_ADDRESSES_DEV,
 } from './x402DelegationProvider';

packages/smart-accounts-kit/src/experimental/x402DelegationProvider.ts

@@ -1,3 +1,5 @@
+import type { Address } from 'viem';
+
 import {
   createOpenDelegation,
   encodeDelegations,
@@ -24,6 +26,15 @@ export type {
 
 export { parseEip155ChainId } from './x402DelegationProviderUtils';
 
+export const METAMASK_FACILITATOR_ADDRESSES: Address[] = [
+  '0xb01caea8c6c47bbf4f4b4c5080ca642043359c2e',
+  '0xc066ac5d385419b1a8c43a0e146fa439837a8b8c',
+  '0xb42f812a44c22cc6b861478900401ee759ebead6',
+];
+export const METAMASK_FACILITATOR_ADDRESSES_DEV: Address[] = [
+  '0xb4827A2a066CD2Ef88560EFdf063dD05C6c41cC7',
+];
+
 /**
  * Creates a delegation provider function for x402 payment requirements.
  *