@atproto/repo
Version:
atproto repo and MST implementation
207 lines • 8.27 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Repo = void 0;
const common_1 = require("@atproto/common");
const lexicon_1 = require("@atproto/lexicon");
const block_map_1 = require("./block-map");
const cid_set_1 = require("./cid-set");
const data_diff_1 = require("./data-diff");
const logger_1 = __importDefault(require("./logger"));
const mst_1 = require("./mst");
const readable_repo_1 = require("./readable-repo");
const types_1 = require("./types");
const util = __importStar(require("./util"));
class Repo extends readable_repo_1.ReadableRepo {
constructor(params) {
super(params);
Object.defineProperty(this, "storage", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
this.storage = params.storage;
}
static async formatInitCommit(storage, did, keypair, initialWrites = [], revOverride) {
const newBlocks = new block_map_1.BlockMap();
let data = await mst_1.MST.create(storage);
for (const record of initialWrites) {
const cid = await newBlocks.add(record.record);
const dataKey = util.formatDataKey(record.collection, record.rkey);
data = await data.add(dataKey, cid);
}
const dataCid = await data.getPointer();
const diff = await data_diff_1.DataDiff.of(data, null);
newBlocks.addMap(diff.newMstBlocks);
const rev = revOverride ?? common_1.TID.nextStr();
const commit = await util.signCommit({
did,
version: 3,
rev,
prev: null, // added for backwards compatibility with v2
data: dataCid,
}, keypair);
const commitCid = await newBlocks.add(commit);
return {
cid: commitCid,
rev,
since: null,
prev: null,
newBlocks,
relevantBlocks: newBlocks,
removedCids: diff.removedCids,
};
}
static async createFromCommit(storage, commit) {
await storage.applyCommit(commit);
return Repo.load(storage, commit.cid);
}
static async create(storage, did, keypair, initialWrites = []) {
const commit = await Repo.formatInitCommit(storage, did, keypair, initialWrites);
return Repo.createFromCommit(storage, commit);
}
static async load(storage, cid) {
const commitCid = cid || (await storage.getRoot());
if (!commitCid) {
throw new Error('No cid provided and none in storage');
}
const commit = await storage.readObj(commitCid, types_1.def.versionedCommit);
const data = await mst_1.MST.load(storage, commit.data);
logger_1.default.info({ did: commit.did }, 'loaded repo for');
return new Repo({
storage,
data,
commit: util.ensureV3Commit(commit),
cid: commitCid,
});
}
async formatCommit(toWrite, keypair) {
const writes = Array.isArray(toWrite) ? toWrite : [toWrite];
const leaves = new block_map_1.BlockMap();
let data = this.data;
for (const write of writes) {
if (write.action === types_1.WriteOpAction.Create) {
const cid = await leaves.add(write.record);
const dataKey = write.collection + '/' + write.rkey;
data = await data.add(dataKey, cid);
}
else if (write.action === types_1.WriteOpAction.Update) {
const cid = await leaves.add(write.record);
const dataKey = write.collection + '/' + write.rkey;
data = await data.update(dataKey, cid);
}
else if (write.action === types_1.WriteOpAction.Delete) {
const dataKey = write.collection + '/' + write.rkey;
data = await data.delete(dataKey);
}
}
const dataCid = await data.getPointer();
const diff = await data_diff_1.DataDiff.of(data, this.data);
const newBlocks = diff.newMstBlocks;
const removedCids = diff.removedCids;
const proofs = await Promise.all(writes.map((op) => data.getCoveringProof(util.formatDataKey(op.collection, op.rkey))));
const relevantBlocks = proofs.reduce((acc, cur) => {
return acc.addMap(cur);
}, new block_map_1.BlockMap());
const addedLeaves = leaves.getMany(diff.newLeafCids.toList());
if (addedLeaves.missing.length > 0) {
throw new Error(`Missing leaf blocks: ${addedLeaves.missing}`);
}
newBlocks.addMap(addedLeaves.blocks);
relevantBlocks.addMap(addedLeaves.blocks);
const rev = common_1.TID.nextStr(this.commit.rev);
const commit = await util.signCommit({
did: this.did,
version: 3,
rev,
prev: null, // added for backwards compatibility with v2
data: dataCid,
}, keypair);
const commitBlock = await (0, common_1.dataToCborBlock)((0, lexicon_1.lexToIpld)(commit));
if (!commitBlock.cid.equals(this.cid)) {
newBlocks.set(commitBlock.cid, commitBlock.bytes);
relevantBlocks.set(commitBlock.cid, commitBlock.bytes);
removedCids.add(this.cid);
}
return {
cid: commitBlock.cid,
rev,
since: this.commit.rev,
prev: this.cid,
newBlocks,
relevantBlocks,
removedCids,
};
}
async applyCommit(commitData) {
await this.storage.applyCommit(commitData);
return Repo.load(this.storage, commitData.cid);
}
async applyWrites(toWrite, keypair) {
const commit = await this.formatCommit(toWrite, keypair);
return this.applyCommit(commit);
}
async formatResignCommit(rev, keypair) {
const commit = await util.signCommit({
did: this.did,
version: 3,
rev,
prev: null, // added for backwards compatibility with v2
data: this.commit.data,
}, keypair);
const newBlocks = new block_map_1.BlockMap();
const commitCid = await newBlocks.add(commit);
return {
cid: commitCid,
rev,
since: null,
prev: null,
newBlocks,
relevantBlocks: newBlocks,
removedCids: new cid_set_1.CidSet([this.cid]),
};
}
async resignCommit(rev, keypair) {
const formatted = await this.formatResignCommit(rev, keypair);
return this.applyCommit(formatted);
}
}
exports.Repo = Repo;
exports.default = Repo;
//# sourceMappingURL=repo.js.map