@metamask/snaps-utils/dist/manifest/validators/checksum.mjs

A collection of utilities for MetaMask Snaps

import { getSnapChecksum } from "../../snaps.mjs";
import { NpmSnapFileNames } from "../../types.mjs";
/**
 * Check if the checksum in manifest matches computed value.
 */
export const checksum = {
    severity: 'error',
    async semanticCheck(files, context) {
        const fetchedFiles = files;
        const gotChecksum = files.manifest.result.source.shasum;
        const expectedChecksum = await getSnapChecksum(fetchedFiles);
        if (gotChecksum !== expectedChecksum) {
            context.report(`"${NpmSnapFileNames.Manifest}" "shasum" field does not match computed shasum. Got "${gotChecksum}", expected "${expectedChecksum}".`, async ({ manifest }) => {
                manifest.source.shasum = expectedChecksum;
                return { manifest };
            });
        }
    },
};
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