Move permission schema metadata into 7715 permission types

packages/7715-permission-types/CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Add `makePermissionDecoderConfigs` to resolve the `PermissionDecoderConfig`s to be used with @metamask/gator-permissions-controller ([#259](https://github.com/MetaMask/smart-accounts-kit/pull/259))
+- Add permission schema metadata and MetaMask facilitator address utilities ([#267](https://github.com/MetaMask/smart-accounts-kit/pull/267))
 
 ## [0.7.1]
 

packages/7715-permission-types/src/index.ts

@@ -25,3 +25,4 @@ export {
   type DeployedContractsByName,
   type PermissionDecoderConfig,
 } from './permissions';
+export * from './permissions/schema';

packages/7715-permission-types/src/permissions/index.ts

@@ -12,6 +12,7 @@ export type { ExpiryRule } from './rules/expiry';
 export type { PayeeRule } from './rules/payee';
 export type { RedeemerRule } from './rules/redeemer';
 export type { DeployedContractsByName, PermissionDecoderConfig };
+export * from './schema';
 /**
  * Builds the canonical set of permission decoders for a chain.
  *

packages/7715-permission-types/src/permissions/schema/constants.ts

@@ -0,0 +1,12 @@
+/** Milliseconds in common time periods. */
+export const SECOND = 1000;
+export const HOUR = 60 * 60 * SECOND;
+export const DAY = 24 * HOUR;
+export const WEEK = 7 * DAY;
+export const FORTNIGHT = 2 * WEEK;
+export const MONTH = 30 * DAY;
+export const YEAR = 365 * DAY;
+
+/** Maximum uint256 value as lowercase hex. */
+export const MAX_UINT256 =
+  '0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff';

packages/7715-permission-types/src/permissions/schema/facilitatorAddresses.ts

@@ -0,0 +1,44 @@
+export const METAMASK_FACILITATOR_ADDRESSES = [
+  '0xB01caEa8c6C47bbf4F4b4c5080Ca642043359C2E',
+  '0xC066ac5D385419B1A8c43A0E146fA439837a8B8c',
+  '0xB42F812A44c22cc6b861478900401ee759EbEAD6',
+] as const;
+
+export const METAMASK_FACILITATOR_ADDRESSES_DEV = [
+  '0xb4827A2a066CD2Ef88560EFdf063dD05C6c41cC7',
+] as const;
+
+export const ALL_METAMASK_FACILITATOR_ADDRESSES = [
+  ...METAMASK_FACILITATOR_ADDRESSES,
+  ...METAMASK_FACILITATOR_ADDRESSES_DEV,
+] as const;
+
+const METAMASK_FACILITATOR_ADDRESSES_LOWERCASE = new Set<string>(
+  ALL_METAMASK_FACILITATOR_ADDRESSES.map((address) => address.toLowerCase()),
+);
+
+/**
+ * Checks whether an address is a known MetaMask facilitator address.
+ *
+ * @param address - Address to check.
+ * @returns True if the address is a known MetaMask facilitator address.
+ */
+export function isMetaMaskFacilitatorAddress(address: string): boolean {
+  return METAMASK_FACILITATOR_ADDRESSES_LOWERCASE.has(address.toLowerCase());
+}
+
+/**
+ * Checks whether every provided address is a known MetaMask facilitator address.
+ *
+ * @param addresses - Addresses to check.
+ * @returns True when the list is non-empty and all entries are known facilitators.
+ */
+export function areOnlyMetaMaskFacilitatorAddresses(
+  addresses: string[] | null | undefined,
+): boolean {
+  if (!addresses?.length) {
+    return false;
+  }
+
+  return addresses.every(isMetaMaskFacilitatorAddress);
+}