out.ts

declare namespace xdr {
    interface UINT {
        readonly MAX_VALUE: 4294967295;
        readonly MIN_VALUE: 0;
        read(io: Buffer): number;
        write(value: number, io: Buffer): void;
        isValid(value: number): boolean;
        toXDR(value: number): Buffer;
        fromXDR(input: Buffer, format?: "raw"): number;
        fromXDR(input: string, format: "hex" | "base64"): number;
    }

    class CryptoKeyType {
        readonly name: "keyTypeEd25519" | "keyTypePreAuthTx" | "keyTypeHashX" | "keyTypeMuxedEd25519";

        readonly value: 0 | 1 | 2 | 256;

        static keyTypeEd25519(): CryptoKeyType;

        static keyTypePreAuthTx(): CryptoKeyType;

        static keyTypeHashX(): CryptoKeyType;

        static keyTypeMuxedEd25519(): CryptoKeyType;

    }

}

Source:

var types = XDR.config((xdr) => {
  xdr.typedef("Uint32", xdr.uint());
  xdr.typedef("Int32", xdr.int());

  xdr.enum("CryptoKeyType", {
    keyTypeEd25519: 0,
    keyTypePreAuthTx: 1,
    keyTypeHashX: 2,
    keyTypeMuxedEd25519: 256,
  });
});