@dfinity/agent/lib/esm/cbor.js

JavaScript and TypeScript library to interact with the Internet Computer

import { Principal } from '@dfinity/principal';
import * as cbor from '@dfinity/cbor';
import { CborDecodeErrorCode, CborEncodeErrorCode, InputError } from "./errors.js";
import { Expiry } from "./agent/index.js";
/**
 * Used to extend classes that need to provide a custom value for the CBOR encoding process.
 */
export class ToCborValue {
}
function hasCborValueMethod(value) {
    return typeof value === 'object' && value !== null && 'toCborValue' in value;
}
/**
 * Encode a JavaScript value into CBOR. If the value is an instance of {@link ToCborValue},
 * the {@link ToCborValue.toCborValue} method will be called to get the value to encode.
 * @param value The value to encode
 */
export function encode(value) {
    try {
        return cbor.encodeWithSelfDescribedTag(value, value => {
            if (Principal.isPrincipal(value)) {
                return value.toUint8Array();
            }
            if (Expiry.isExpiry(value)) {
                return value.toBigInt();
            }
            if (hasCborValueMethod(value)) {
                return value.toCborValue();
            }
            return value;
        });
    }
    catch (error) {
        throw InputError.fromCode(new CborEncodeErrorCode(error, value));
    }
}
/**
 * Decode a CBOR encoded value into a JavaScript value.
 * @param input The CBOR encoded value
 */
export function decode(input) {
    try {
        return cbor.decode(input);
    }
    catch (error) {
        throw InputError.fromCode(new CborDecodeErrorCode(error, input));
    }
}
// Not strictly necessary, we're just keeping it for backwards compatibility.
export const Cbor = {
    encode,
    decode,
};
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