@govtechsg/open-attestation
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JavaScript
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
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import { hashToBuffer, SchemaValidationError } from "../shared/utils";
import { MerkleTree } from "../shared/merkle";
import { SchemaId } from "../shared/@types/document";
import { digestCredential } from "../3.0/digest";
import { validateSchema as validate } from "../shared/validate";
import { encodeSalt, salt } from "./salt";
import { validateW3C } from "./validate";
import { getSchema } from "../shared/ajv";
var getExternalSchema = function (schema) { return (schema ? { schema: schema } : {}); };
/**
* @deprecated will be removed in the next major release in favour of OpenAttestation v4.0 (more info: https://github.com/Open-Attestation/open-attestation/tree/alpha)
*/
export var wrapDocument = function (credential, options) { return __awaiter(void 0, void 0, void 0, function () {
var document, salts, digest, batchBuffers, merkleTree, merkleRoot, merkleProof, verifiableCredential, errors;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
document = __assign(__assign({ version: SchemaId.v3 }, getExternalSchema(options.externalSchemaId)), credential);
// To ensure that base @context exists, but this also means some of our validateW3C errors may be unreachable
if (!document["@context"]) {
document["@context"] = ["https://www.w3.org/2018/credentials/v1"];
}
// Since our wrapper adds in OA-specific properties, we should push our OA context. This is also to pass W3C VC test suite.
if (Array.isArray(document["@context"]) &&
!document["@context"].includes("https://schemata.openattestation.com/com/openattestation/1.0/OpenAttestation.v3.json")) {
document["@context"].push("https://schemata.openattestation.com/com/openattestation/1.0/OpenAttestation.v3.json");
}
salts = salt(document);
digest = digestCredential(document, salts, []);
batchBuffers = [digest].map(hashToBuffer);
merkleTree = new MerkleTree(batchBuffers);
merkleRoot = merkleTree.getRoot().toString("hex");
merkleProof = merkleTree.getProof(hashToBuffer(digest)).map(function (buffer) { return buffer.toString("hex"); });
verifiableCredential = __assign(__assign({}, document), { proof: {
type: "OpenAttestationMerkleProofSignature2018",
proofPurpose: "assertionMethod",
targetHash: digest,
proofs: merkleProof,
merkleRoot: merkleRoot,
salts: encodeSalt(salts),
privacy: {
obfuscated: [],
},
} });
errors = validate(verifiableCredential, getSchema(SchemaId.v3));
if (errors.length > 0) {
throw new SchemaValidationError("Invalid document", errors, verifiableCredential);
}
return [4 /*yield*/, validateW3C(verifiableCredential)];
case 1:
_a.sent();
return [2 /*return*/, verifiableCredential];
}
});
}); };
/**
* @deprecated will be removed in the next major release in favour of OpenAttestation v4.0 (more info: https://github.com/Open-Attestation/open-attestation/tree/alpha)
*/
export var wrapDocuments = function (documents, options) { return __awaiter(void 0, void 0, void 0, function () {
var verifiableCredentials, merkleTree, merkleRoot;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, Promise.all(documents.map(function (document) { return wrapDocument(document, options); }))];
case 1:
verifiableCredentials = _a.sent();
merkleTree = new MerkleTree(verifiableCredentials.map(function (verifiableCredential) { return verifiableCredential.proof.targetHash; }).map(hashToBuffer));
merkleRoot = merkleTree.getRoot().toString("hex");
// for each document, update the merkle root and add the proofs needed
return [2 /*return*/, verifiableCredentials.map(function (verifiableCredential) {
var digest = verifiableCredential.proof.targetHash;
var merkleProof = merkleTree.getProof(hashToBuffer(digest)).map(function (buffer) { return buffer.toString("hex"); });
return __assign(__assign({}, verifiableCredential), { proof: __assign(__assign({}, verifiableCredential.proof), { proofs: merkleProof, merkleRoot: merkleRoot }) });
})];
}
});
}); };