slpjs
Version:
Simple Ledger Protocol (SLP) JavaScript Library
591 lines • 35 kB
JavaScript
"use strict";
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catch (error) { e = { error: error }; }
finally {
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finally { if (e) throw e.error; }
}
return ar;
};
var __spread = (this && this.__spread) || function () {
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return ar;
};
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
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};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LocalValidator = void 0;
var index_1 = require("../index");
var slp_1 = require("./slp");
var bignumber_js_1 = __importDefault(require("bignumber.js"));
var Bitcore = __importStar(require("bitcore-lib-cash"));
var crypto_1 = require("./crypto");
var sleep = function (ms) { return new Promise(function (resolve) { return setTimeout(resolve, ms); }); };
var LocalValidator = /** @class */ (function () {
function LocalValidator(BITBOX, getRawTransactions, logger, useTransactionCache) {
if (useTransactionCache === void 0) { useTransactionCache = true; }
this.logger = { log: function (s) { return null; } };
if (!BITBOX) {
throw Error("Must provide BITBOX instance to class constructor.");
}
if (!getRawTransactions) {
throw Error("Must provide method getRawTransactions to class constructor.");
}
if (logger) {
this.logger = logger;
}
this.BITBOX = BITBOX;
this.getRawTransactions = getRawTransactions;
this.slp = new slp_1.Slp(BITBOX);
this.cachedValidations = {};
this.cachedRawTransactions = {};
this.useTransactionCache = useTransactionCache;
}
LocalValidator.prototype.addValidationFromStore = function (hex, isValid) {
var id = crypto_1.Crypto.txid(Buffer.from(hex, "hex")).toString("hex");
if (!this.cachedValidations[id]) {
this.cachedValidations[id] = { validity: isValid, parents: [], details: null, invalidReason: null, waiting: false };
}
if (!this.cachedRawTransactions[id] && this.useTransactionCache) {
this.cachedRawTransactions[id] = hex;
}
};
LocalValidator.prototype.waitForCurrentValidationProcessing = function (txid) {
return __awaiter(this, void 0, void 0, function () {
var cached;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
cached = this.cachedValidations[txid];
_a.label = 1;
case 1:
if (!true) return [3 /*break*/, 3];
if (typeof cached.validity === "boolean") {
cached.waiting = false;
return [3 /*break*/, 3];
}
return [4 /*yield*/, sleep(10)];
case 2:
_a.sent();
return [3 /*break*/, 1];
case 3: return [2 /*return*/];
}
});
});
};
LocalValidator.prototype.waitForTransactionDownloadToComplete = function (txid) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!true) return [3 /*break*/, 2];
if (this.cachedRawTransactions[txid] && this.cachedRawTransactions[txid] !== "waiting") {
return [3 /*break*/, 2];
}
return [4 /*yield*/, sleep(10)];
case 1:
_a.sent();
return [3 /*break*/, 0];
case 2: return [2 /*return*/];
}
});
});
};
LocalValidator.prototype.retrieveRawTransaction = function (txid) {
return __awaiter(this, void 0, void 0, function () {
var txns;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!(this.useTransactionCache && !this.cachedRawTransactions[txid])) return [3 /*break*/, 2];
this.cachedRawTransactions[txid] = "waiting";
return [4 /*yield*/, this.getRawTransactions([txid])];
case 1:
txns = _a.sent();
if (!txns || txns.length === 0 || typeof txns[0] !== "string") {
throw Error("Response error in getRawTransactions, got: " + txns);
}
this.cachedRawTransactions[txid] = txns[0];
return [2 /*return*/, txns[0]];
case 2:
if (!this.useTransactionCache) return [3 /*break*/, 3];
return [2 /*return*/, this.cachedRawTransactions[txid]];
case 3: return [4 /*yield*/, this.getRawTransactions([txid])];
case 4: return [2 /*return*/, _a.sent()];
}
});
});
};
LocalValidator.prototype.isValidSlpTxid = function (txid, tokenIdFilter, tokenTypeFilter) {
return __awaiter(this, void 0, void 0, function () {
var valid;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
this.logger.log("SLPJS Validating: " + txid);
return [4 /*yield*/, this._isValidSlpTxid(txid, tokenIdFilter, tokenTypeFilter)];
case 1:
valid = _a.sent();
this.logger.log("SLPJS Result: " + valid + " (" + txid + ")");
if (!valid && this.cachedValidations[txid].invalidReason) {
this.logger.log("SLPJS Invalid Reason: " + this.cachedValidations[txid].invalidReason);
}
else if (!valid) {
this.logger.log("SLPJS Invalid Reason: unknown (result is user supplied)");
}
return [2 /*return*/, valid];
}
});
});
};
//
// This method uses recursion to do a Depth-First-Search with the node result being
// computed in Postorder Traversal (left/right/root) order. A validation cache
// is used to keep track of the results for nodes that have already been evaluated.
//
// Each call to this method evaluates node validity with respect to
// its parent node(s), so it walks backwards until the
// validation cache provides a result or the GENESIS node is evaluated.
// Root nodes await the validation result of their upstream parent.
//
// In the case of NFT1 the search continues to the group/parent NFT DAG after the Genesis
// of the NFT child is discovered.
//
LocalValidator.prototype._isValidSlpTxid = function (txid, tokenIdFilter, tokenTypeFilter) {
return __awaiter(this, void 0, void 0, function () {
var txn, slpmsg, input_txid, input_prevout, input_txhex, input_tx, input_slpmsg, nft_parent_dag_validity, i, input_txid, input_txhex, input_tx, input_slpmsg, tokenOutQty, tokenInQty, i, input_txid, input_txhex, input_tx, input_slpmsg, parentTxids, _loop_1, this_1, parentTxids_1, parentTxids_1_1, id, e_1_1, validInputQty, tokenOutQty, validVersionType;
var e_1, _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
if (!!this.cachedValidations[txid]) return [3 /*break*/, 2];
this.cachedValidations[txid] = {
validity: null,
parents: [],
details: null,
invalidReason: null,
waiting: false,
};
return [4 /*yield*/, this.retrieveRawTransaction(txid)];
case 1:
_b.sent();
return [3 /*break*/, 3];
case 2:
if (typeof this.cachedValidations[txid].validity === "boolean") {
return [2 /*return*/, this.cachedValidations[txid].validity];
}
_b.label = 3;
case 3:
if (!(!this.cachedRawTransactions[txid] || this.cachedRawTransactions[txid] === "waiting")) return [3 /*break*/, 7];
if (!this.useTransactionCache) return [3 /*break*/, 5];
if (this.cachedRawTransactions[txid] !== "waiting") {
this.retrieveRawTransaction(txid);
}
// Wait for previously a initiated download to completed
return [4 /*yield*/, this.waitForTransactionDownloadToComplete(txid)];
case 4:
// Wait for previously a initiated download to completed
_b.sent();
return [3 /*break*/, 7];
case 5: return [4 /*yield*/, this.retrieveRawTransaction(txid)];
case 6:
_b.sent();
_b.label = 7;
case 7:
if (!this.cachedValidations[txid].waiting) return [3 /*break*/, 9];
return [4 /*yield*/, this.waitForCurrentValidationProcessing(txid)];
case 8:
_b.sent();
if (typeof this.cachedValidations[txid].validity === "boolean") {
return [2 /*return*/, this.cachedValidations[txid].validity];
}
_b.label = 9;
case 9:
this.cachedValidations[txid].waiting = true;
txn = new Bitcore.Transaction(this.cachedRawTransactions[txid]);
try {
slpmsg = this.cachedValidations[txid].details = this.slp.parseSlpOutputScript(txn.outputs[0]._scriptBuffer);
if (slpmsg.transactionType === index_1.SlpTransactionType.GENESIS) {
slpmsg.tokenIdHex = txid;
}
}
catch (e) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "SLP OP_RETURN parsing error (" + e.message + ").";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
// Check for tokenId filter
if (tokenIdFilter && slpmsg.tokenIdHex !== tokenIdFilter) {
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "Validator was run with filter only considering tokenId " + tokenIdFilter + " as valid.";
return [2 /*return*/, false]; // Don't save boolean result to cache incase cache is ever used without tokenIdFilter.
}
else {
if (this.cachedValidations[txid].validity !== false) {
this.cachedValidations[txid].invalidReason = null;
}
}
// Check specified token type is being respected
if (tokenTypeFilter && slpmsg.versionType !== tokenTypeFilter) {
this.cachedValidations[txid].validity = null;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "Validator was run with filter only considering token type: " + tokenTypeFilter + " as valid.";
return [2 /*return*/, false]; // Don't save boolean result to cache incase cache is ever used with different token type.
}
else {
if (this.cachedValidations[txid].validity !== false) {
this.cachedValidations[txid].invalidReason = null;
}
}
if (!(slpmsg.transactionType === index_1.SlpTransactionType.GENESIS)) return [3 /*break*/, 14];
if (!(slpmsg.versionType === 0x41)) return [3 /*break*/, 12];
input_txid = txn.inputs[0].prevTxId.toString("hex");
input_prevout = txn.inputs[0].outputIndex;
return [4 /*yield*/, this.retrieveRawTransaction(input_txid)];
case 10:
input_txhex = _b.sent();
input_tx = new Bitcore.Transaction(input_txhex);
input_slpmsg = void 0;
try {
input_slpmsg = this.slp.parseSlpOutputScript(input_tx.outputs[0]._scriptBuffer);
}
catch (_) { }
if (!input_slpmsg || input_slpmsg.versionType !== 0x81) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "NFT1 child GENESIS does not have a valid NFT1 parent input.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
// Check that the there is a burned output >0 in the parent txn SLP message
if (input_slpmsg.transactionType === index_1.SlpTransactionType.SEND) {
if (input_prevout > input_slpmsg.sendOutputs.length - 1) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "NFT1 child GENESIS does not have a valid NFT1 parent input.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
else if (!input_slpmsg.sendOutputs[input_prevout].isGreaterThan(0)) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "NFT1 child's parent has SLP output that is not greater than zero.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
else {
this.cachedValidations[txid].validity = true;
this.cachedValidations[txid].waiting = false;
}
}
else if (input_slpmsg.transactionType === index_1.SlpTransactionType.GENESIS ||
input_slpmsg.transactionType === index_1.SlpTransactionType.MINT) {
if (input_prevout !== 1) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "NFT1 child GENESIS does not have a valid NFT1 parent input.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
else if (!input_slpmsg.genesisOrMintQuantity.isGreaterThan(0)) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "NFT1 child's parent has SLP output that is not greater than zero.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
}
return [4 /*yield*/, this.isValidSlpTxid(input_txid, undefined, 0x81)];
case 11:
nft_parent_dag_validity = _b.sent();
this.cachedValidations[txid].validity = nft_parent_dag_validity;
this.cachedValidations[txid].waiting = false;
if (!nft_parent_dag_validity) {
this.cachedValidations[txid].invalidReason = "NFT1 child GENESIS does not have valid parent DAG.";
}
return [2 /*return*/, this.cachedValidations[txid].validity];
case 12:
this.cachedValidations[txid].validity = true;
this.cachedValidations[txid].waiting = false;
return [2 /*return*/, this.cachedValidations[txid].validity];
case 13: return [3 /*break*/, 24];
case 14:
if (!(slpmsg.transactionType === index_1.SlpTransactionType.MINT)) return [3 /*break*/, 19];
i = 0;
_b.label = 15;
case 15:
if (!(i < txn.inputs.length)) return [3 /*break*/, 18];
input_txid = txn.inputs[i].prevTxId.toString("hex");
return [4 /*yield*/, this.retrieveRawTransaction(input_txid)];
case 16:
input_txhex = _b.sent();
input_tx = new Bitcore.Transaction(input_txhex);
try {
input_slpmsg = this.slp.parseSlpOutputScript(input_tx.outputs[0]._scriptBuffer);
if (input_slpmsg.transactionType === index_1.SlpTransactionType.GENESIS) {
input_slpmsg.tokenIdHex = input_txid;
}
if (input_slpmsg.tokenIdHex === slpmsg.tokenIdHex) {
if (input_slpmsg.transactionType === index_1.SlpTransactionType.GENESIS || input_slpmsg.transactionType === index_1.SlpTransactionType.MINT) {
if (txn.inputs[i].outputIndex === input_slpmsg.batonVout) {
this.cachedValidations[txid].parents.push({
txid: txn.inputs[i].prevTxId.toString("hex"),
vout: txn.inputs[i].outputIndex,
versionType: input_slpmsg.versionType,
valid: null,
inputQty: null,
});
}
}
}
}
catch (_) { }
_b.label = 17;
case 17:
i++;
return [3 /*break*/, 15];
case 18:
if (this.cachedValidations[txid].parents.length < 1) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "MINT transaction must have at least 1 candidate baton parent input.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
return [3 /*break*/, 24];
case 19:
if (!(slpmsg.transactionType === index_1.SlpTransactionType.SEND)) return [3 /*break*/, 24];
tokenOutQty = slpmsg.sendOutputs.reduce(function (t, v) { return t.plus(v); }, new bignumber_js_1.default(0));
tokenInQty = new bignumber_js_1.default(0);
i = 0;
_b.label = 20;
case 20:
if (!(i < txn.inputs.length)) return [3 /*break*/, 23];
input_txid = txn.inputs[i].prevTxId.toString("hex");
return [4 /*yield*/, this.retrieveRawTransaction(input_txid)];
case 21:
input_txhex = _b.sent();
input_tx = new Bitcore.Transaction(input_txhex);
try {
input_slpmsg = this.slp.parseSlpOutputScript(input_tx.outputs[0]._scriptBuffer);
if (input_slpmsg.transactionType === index_1.SlpTransactionType.GENESIS) {
input_slpmsg.tokenIdHex = input_txid;
}
if (input_slpmsg.tokenIdHex === slpmsg.tokenIdHex) {
if (input_slpmsg.transactionType === index_1.SlpTransactionType.SEND) {
if (txn.inputs[i].outputIndex <= input_slpmsg.sendOutputs.length - 1) {
tokenInQty = tokenInQty.plus(input_slpmsg.sendOutputs[txn.inputs[i].outputIndex]);
this.cachedValidations[txid].parents.push({
txid: txn.inputs[i].prevTxId.toString("hex"),
vout: txn.inputs[i].outputIndex,
versionType: input_slpmsg.versionType,
valid: null,
inputQty: input_slpmsg.sendOutputs[txn.inputs[i].outputIndex]
});
}
}
else if (input_slpmsg.transactionType === index_1.SlpTransactionType.GENESIS || input_slpmsg.transactionType === index_1.SlpTransactionType.MINT) {
if (txn.inputs[i].outputIndex === 1) {
tokenInQty = tokenInQty.plus(input_slpmsg.genesisOrMintQuantity);
this.cachedValidations[txid].parents.push({
txid: txn.inputs[i].prevTxId.toString("hex"),
vout: txn.inputs[i].outputIndex,
versionType: input_slpmsg.versionType,
valid: null,
inputQty: input_slpmsg.genesisOrMintQuantity
});
}
}
}
}
catch (_) { }
_b.label = 22;
case 22:
i++;
return [3 /*break*/, 20];
case 23:
// Check token inputs are greater than token outputs (includes valid and invalid inputs)
if (tokenOutQty.isGreaterThan(tokenInQty)) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "Token outputs are greater than possible token inputs.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
_b.label = 24;
case 24:
parentTxids = __spread(new Set(this.cachedValidations[txid].parents.map(function (p) { return p.txid; })));
_loop_1 = function (id) {
var valid;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this_1.isValidSlpTxid(id)];
case 1:
valid = _a.sent();
this_1.cachedValidations[txid].parents.filter(function (p) { return p.txid === id; }).map(function (p) { return p.valid = valid; });
return [2 /*return*/];
}
});
};
this_1 = this;
_b.label = 25;
case 25:
_b.trys.push([25, 30, 31, 32]);
parentTxids_1 = __values(parentTxids), parentTxids_1_1 = parentTxids_1.next();
_b.label = 26;
case 26:
if (!!parentTxids_1_1.done) return [3 /*break*/, 29];
id = parentTxids_1_1.value;
return [5 /*yield**/, _loop_1(id)];
case 27:
_b.sent();
_b.label = 28;
case 28:
parentTxids_1_1 = parentTxids_1.next();
return [3 /*break*/, 26];
case 29: return [3 /*break*/, 32];
case 30:
e_1_1 = _b.sent();
e_1 = { error: e_1_1 };
return [3 /*break*/, 32];
case 31:
try {
if (parentTxids_1_1 && !parentTxids_1_1.done && (_a = parentTxids_1.return)) _a.call(parentTxids_1);
}
finally { if (e_1) throw e_1.error; }
return [7 /*endfinally*/];
case 32:
// Check MINT for exactly 1 valid MINT baton
if (this.cachedValidations[txid].details.transactionType === index_1.SlpTransactionType.MINT) {
if (this.cachedValidations[txid].parents.filter(function (p) { return p.valid && p.inputQty === null; }).length !== 1) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "MINT transaction with invalid baton parent.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
}
// Check valid inputs are greater than token outputs
if (this.cachedValidations[txid].details.transactionType === index_1.SlpTransactionType.SEND) {
validInputQty = this.cachedValidations[txid].parents.reduce(function (t, v) { return v.valid ? t.plus(v.inputQty) : t; }, new bignumber_js_1.default(0));
tokenOutQty = slpmsg.sendOutputs.reduce(function (t, v) { return t.plus(v); }, new bignumber_js_1.default(0));
if (tokenOutQty.isGreaterThan(validInputQty)) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "Token outputs are greater than valid token inputs.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
}
// Check versionType is not different from valid parents
if (this.cachedValidations[txid].parents.filter(function (p) { return p.valid; }).length > 0) {
validVersionType = this.cachedValidations[txid].parents.find(function (p) { return p.valid; }).versionType;
if (this.cachedValidations[txid].details.versionType !== validVersionType) {
this.cachedValidations[txid].validity = false;
this.cachedValidations[txid].waiting = false;
this.cachedValidations[txid].invalidReason = "SLP version/type mismatch from valid parent.";
return [2 /*return*/, this.cachedValidations[txid].validity];
}
}
this.cachedValidations[txid].validity = true;
this.cachedValidations[txid].waiting = false;
return [2 /*return*/, this.cachedValidations[txid].validity];
}
});
});
};
LocalValidator.prototype.validateSlpTransactions = function (txids) {
return __awaiter(this, void 0, void 0, function () {
var res, i, _a, _b;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
res = [];
i = 0;
_c.label = 1;
case 1:
if (!(i < txids.length)) return [3 /*break*/, 4];
_b = (_a = res).push;
return [4 /*yield*/, this.isValidSlpTxid(txids[i])];
case 2:
_b.apply(_a, [(_c.sent()) ? txids[i] : ""]);
_c.label = 3;
case 3:
i++;
return [3 /*break*/, 1];
case 4: return [2 /*return*/, res.filter(function (id) { return id.length > 0; })];
}
});
});
};
return LocalValidator;
}());
exports.LocalValidator = LocalValidator;
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