Seaport Order Validator -- Convert SeaportValidator Errors and Warnings into a readable error message

seaportValidatorErrors.ts

/**
 * Converts a SeaportValidator error/warning code to a human readable string
 * @param code number indicating the error/warning code
 * @returns readable string
 */
export function getErrorMessage(code: number): string {
  switch (code) {
    case 100:
      return "Invalid order format. Ensure offer/consideration follow requirements";
    case 200:
      return "ERC20 identifier must be zero";
    case 201:
      return "ERC20 invalid token";
    case 202:
      return "ERC20 insufficient allowance to conduit";
    case 203:
      return "ERC20 insufficient balance";
    case 300:
      return "ERC721 amount must be one";
    case 301:
      return "ERC721 token is invalid";
    case 302:
      return "ERC721 token with identifier does not exist";
    case 303:
      return "ERC721 not owner of token";
    case 304:
      return "ERC721 conduit not approved";
    case 305:
      return "ERC721 offer item using criteria and more than amount of one requires partial fills";
    case 400:
      return "ERC1155 invalid token";
    case 401:
      return "ERC1155 conduit not approved";
    case 402:
      return "ERC1155 insufficient balance";
    case 500:
      return "Consideration amount must not be zero";
    case 501:
      return "Consideration recipient must not be null address";
    case 502:
      return "Consideration contains extra items";
    case 503:
      return "Private sale cannot be to self";
    case 504:
      return "Zero consideration items";
    case 505:
      return "Duplicate consideration items";
    case 506:
      return "Offerer is not receiving at least one item";
    case 507:
      return "Private Sale Order. Be careful on fulfillment";
    case 508:
      return "Amount velocity is too high. Amount changes over 5% per 30 min if warning and over 50% per 30 min if error";
    case 509:
      return "Amount step large. The steps between each step may be more than expected. Offer items are rounded down and consideration items are rounded up.";
    case 600:
      return "Zero offer items";
    case 601:
      return "Offer amount must not be zero";
    case 602:
      return "More than one offer item";
    case 603:
      return "Native offer item";
    case 604:
      return "Duplicate offer item";
    case 605:
      return "Amount velocity is too high. Amount changes over 5% per 30 min if warning and over 50% per 30 min if error";
    case 606:
      return "Amount step large. The steps between each step may be more than expected. Offer items are rounded down and consideration items are rounded up.";
    case 700:
      return "Primary fee missing";
    case 701:
      return "Primary fee item type incorrect";
    case 702:
      return "Primary fee token incorrect";
    case 703:
      return "Primary fee start amount too low";
    case 704:
      return "Primary fee end amount too low";
    case 705:
      return "Primary fee recipient incorrect";
    case 800:
      return "Order cancelled";
    case 801:
      return "Order fully filled";
    case 802:
      return "Cannot validate status of contract order";
    case 900:
      return "End time is before start time";
    case 901:
      return "Order expired";
    case 902:
      return "Order expiration in too long (default 26 weeks)";
    case 903:
      return "Order not active";
    case 904:
      return "Short order duration (default 30 min)";
    case 1000:
      return "Conduit key invalid";
    case 1001:
      return "Conduit does not have canonical Seaport as an open channel";
    case 1100:
      return "Signature invalid";
    case 1101:
      return "Contract orders do not have signatures";
    case 1102:
      return "Signature counter below current counter";
    case 1103:
      return "Signature counter above current counter";
    case 1104:
      return "Signature may be invalid since `totalOriginalConsiderationItems` is not set correctly";
    case 1200:
      return "Creator fee missing";
    case 1201:
      return "Creator fee item type incorrect";
    case 1202:
      return "Creator fee token incorrect";
    case 1203:
      return "Creator fee start amount too low";
    case 1204:
      return "Creator fee end amount too low";
    case 1205:
      return "Creator fee recipient incorrect";
    case 1300:
      return "Native token address must be null address";
    case 1301:
      return "Native token identifier must be zero";
    case 1302:
      return "Native token insufficient balance";
    case 1400:
      return "Zone is invalid";
    case 1401:
      return "Zone rejected order. This order must be fulfilled by the zone.";
    case 1402:
      return "Zone not set. Order unfulfillable";
    case 1500:
      return "Merkle input only has one leaf";
    case 1501:
      return "Merkle input not sorted correctly";
    case 1600:
      return "Contract offerer is invalid";
    default:
      return "Unknown error or warning code";
  }
}

Fully aligned with the latest Validator contract, available on-chain here: https://etherscan.io/address/0x00e5F120f500006757E984F1DED400fc00370000

Latest docs on the SeaportValidator contract should be available here: https://github.com/ProjectOpenSea/seaport/blob/main/docs/OrderValidator.md