type FetchPermissionsRequest = {
  chainId: string; // hex, uint256
  account: string; // address
  spender: string; // address
  pageOptions?: {
    pageSize number; // number of items requested, defaults to 50
    cursor string; // identifier for where the page should start
  }
}
 
type FetchPermissionsResult = {
  permissions: FetchPermissionsResultItem[];
  pageDescription: {
    pageSize number; // number of items returned
    nextCursor string; // identifier for where the next page should start
  }
}
 
type FetchPermissionsResultItem = {
  createdAt: number; // UTC timestamp for when the permission was granted
  permissionHash: string; // hex
  signature: string; // hex
  permission: {
    account: string; // address
    spender: string; // address
    token: string; // address
    allowance: string; // base 10 numeric string
    period: number; // unix seconds
    start: number; // unix seconds
    end: number; // unix seconds
    salt: string; // base 10 numeric string
    extraData: string // hex
  };
}