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Просмотр файла: DowntimeSlasher.js
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
if (typeof b !== "function" && b !== null)
throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
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); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DowntimeSlasherWrapper = void 0;
var BaseSlasher_1 = require("./BaseSlasher");
var BaseWrapper_1 = require("./BaseWrapper");
var unpackInterval = function (interval) { return [interval.start, interval.end]; };
/**
* Contract handling slashing for Validator downtime using intervals.
*/
var DowntimeSlasherWrapper = /** @class */ (function (_super) {
__extends(DowntimeSlasherWrapper, _super);
function DowntimeSlasherWrapper() {
var _this = _super !== null && _super.apply(this, arguments) || this;
/**
* Returns slashable downtime in blocks.
* @return The number of consecutive blocks before a Validator missing from IBFT consensus
* can be slashed.
*/
_this.slashableDowntime = (0, BaseWrapper_1.proxyCall)(_this.contract.methods.slashableDowntime, undefined, BaseWrapper_1.valueToInt);
/**
* Calculates and returns the signature bitmap for the specified interval.
* Similar to the parentSealBitmap of every block (where you have which validators were
* able to sign the previous block), this bitmap shows for that specific interval which
* validators signed at least one block
* @param interval First and last block of the interval.
* @return (string) The signature uptime bitmap for the specified interval.
* @dev startBlock and endBlock must be in the same epoch.
* @dev The getParentSealBitmap precompile requires that startBlock must be within 4 epochs of
* the current block.
*/
_this.getBitmapForInterval = (0, BaseWrapper_1.proxyCall)(_this.contract.methods.getBitmapForInterval, unpackInterval, BaseWrapper_1.solidityBytesToString);
/**
* Calculates and sets the signature bitmap for the specified interval.
* @param interval First and last block of the interval.
* @dev interval.start and interval.end must be in the same epoch.
* @return The signature bitmap for the specified interval.
*/
_this.setBitmapForInterval = (0, BaseWrapper_1.proxySend)(_this.connection, _this.contract.methods.setBitmapForInterval, unpackInterval);
/**
* Shows if the user already called the `setBitmapForInterval` for
* the specific interval.
* @param interval First and last block of the interval.
* @return True if the user already called the `setBitmapForInterval` for
* the specific interval.
*/
_this.isBitmapSetForInterval = (0, BaseWrapper_1.proxyCall)(_this.contract.methods.isBitmapSetForInterval, unpackInterval);
_this.lastSlashedBlock = (0, BaseWrapper_1.proxyCall)(_this.contract.methods.lastSlashedBlock, undefined, BaseWrapper_1.valueToInt);
return _this;
}
/**
* Returns current configuration parameters.
*/
DowntimeSlasherWrapper.prototype.getConfig = function () {
return __awaiter(this, void 0, void 0, function () {
var res;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, Promise.all([this.slashableDowntime(), this.slashingIncentives()])];
case 1:
res = _a.sent();
return [2 /*return*/, {
slashableDowntime: res[0],
slashingIncentives: res[1],
}];
}
});
});
};
/**
* @dev Returns human readable configuration of the downtime slasher contract
* @return DowntimeSlasherConfig object
*/
DowntimeSlasherWrapper.prototype.getHumanReadableConfig = function () {
return __awaiter(this, void 0, void 0, function () {
var config;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.getConfig()];
case 1:
config = _a.sent();
return [2 /*return*/, __assign(__assign({}, config), { slashableDowntime: (0, BaseWrapper_1.blocksToDurationString)(config.slashableDowntime) })];
}
});
});
};
/**
* Calculates intervals which span `slashableDowntime` before provided block.
* @param block Block number to build intervals before.
* @param maximumLength Maximum length for any interval (limited by gas limit).
* @dev if block is undefined, latest will be used
* @return The signature bitmap for the specified interval.
*/
DowntimeSlasherWrapper.prototype.slashableDowntimeIntervalsBefore = function (block, maximumLength) {
if (maximumLength === void 0) { maximumLength = 4000; }
return __awaiter(this, void 0, void 0, function () {
var _a, window, blockchainParamsWrapper, end, intervals, epochNumber, firstBlock, start;
return __generator(this, function (_b) {
switch (_b.label) {
case 0: return [4 /*yield*/, Promise.all([
this.getSlashableDowntimeWindow(undefined, block),
this.contracts.getBlockchainParameters(),
])];
case 1:
_a = _b.sent(), window = _a[0], blockchainParamsWrapper = _a[1];
end = window.end;
intervals = [];
_b.label = 2;
case 2:
if (!(end > window.start)) return [3 /*break*/, 5];
return [4 /*yield*/, blockchainParamsWrapper.getEpochNumberOfBlock(end)];
case 3:
epochNumber = _b.sent();
return [4 /*yield*/, blockchainParamsWrapper.getFirstBlockNumberForEpoch(epochNumber)];
case 4:
firstBlock = _b.sent();
start = Math.max(window.start, end - maximumLength, firstBlock);
intervals.push({ start: start, end: end });
end = start - 1;
return [3 /*break*/, 2];
case 5: return [2 /*return*/, intervals.reverse()];
}
});
});
};
/**
* Shows if the user already called the `setBitmapForInterval` for intervals.
* @param intervals First and last block of the interval.
* @return True if the user already called the `setBitmapForInterval` for intervals.
*/
DowntimeSlasherWrapper.prototype.isBitmapSetForIntervals = function (intervals) {
return __awaiter(this, void 0, void 0, function () {
var setArray;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, Promise.all(intervals.map(function (interval) { return _this.isBitmapSetForInterval(interval); }))];
case 1:
setArray = _a.sent();
return [2 /*return*/, !setArray.some(function (set) { return !set; })];
}
});
});
};
/**
* Tests if the given validator or signer did not sign any blocks in the interval.
* @param address Address of the validator account or signer.
* @param interval First and last block of the interval.
*/
DowntimeSlasherWrapper.prototype.wasValidatorDownForInterval = function (address, interval) {
return __awaiter(this, void 0, void 0, function () {
var startSignerIndex;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.signerIndexAtBlock(address, interval.start)];
case 1:
startSignerIndex = _a.sent();
return [2 /*return*/, this.contract.methods
.wasDownForInterval(interval.start, interval.end, startSignerIndex)
.call()];
}
});
});
};
/**
* Returns true if the validator did not sign any blocks for the specified overlapping or adjacent
* intervals.
* @param address Address of the validator account or signer.
* @param intervals
* @return True if the validator signature does not appear in any block within the window.
*/
DowntimeSlasherWrapper.prototype.wasValidatorDownForIntervals = function (address, intervals) {
return __awaiter(this, void 0, void 0, function () {
var downArray;
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, Promise.all(intervals.map(function (interval) { return _this.wasValidatorDownForInterval(address, interval); }))];
case 1:
downArray = _a.sent();
return [2 /*return*/, downArray.every(function (down) { return down; })];
}
});
});
};
/**
* Returns true if the validator did not sign any blocks for the specified overlapping or adjacent
* intervals.
* @param address Address of the validator account or signer.
* @param intervals A list of ordered intervals for which signature bitmaps have already been set.
*/
DowntimeSlasherWrapper.prototype.slashValidator = function (address, intervals) {
return __awaiter(this, void 0, void 0, function () {
var blockchainParamsWrapper, signerIndices, prevEpochNumber, _i, intervals_1, interval, epochNumber, signerIndex, _a, _b, _c, _d;
return __generator(this, function (_e) {
switch (_e.label) {
case 0:
if (intervals.length === 0) {
throw new Error('intervals array should have at least one element');
}
return [4 /*yield*/, this.contracts.getBlockchainParameters()];
case 1:
blockchainParamsWrapper = _e.sent();
signerIndices = [];
prevEpochNumber = -1;
_i = 0, intervals_1 = intervals;
_e.label = 2;
case 2:
if (!(_i < intervals_1.length)) return [3 /*break*/, 6];
interval = intervals_1[_i];
return [4 /*yield*/, blockchainParamsWrapper.getFirstBlockNumberForEpoch(interval.start)];
case 3:
epochNumber = _e.sent();
if (!(epochNumber !== prevEpochNumber)) return [3 /*break*/, 5];
return [4 /*yield*/, this.signerIndexAtBlock(address, interval.start)];
case 4:
signerIndex = _e.sent();
signerIndices.push(signerIndex);
prevEpochNumber = epochNumber;
_e.label = 5;
case 5:
_i++;
return [3 /*break*/, 2];
case 6:
_b = (_a = this.slash).apply;
_c = [this];
_d = [[intervals.map(function (interval) { return interval.start; }),
intervals.map(function (interval) { return interval.end; }),
signerIndices]];
return [4 /*yield*/, this.trailingSlashArgs(address, intervals[0].start)];
case 7: return [2 /*return*/, _b.apply(_a, _c.concat([__spreadArray.apply(void 0, _d.concat([(_e.sent()), false]))]))];
}
});
});
};
/**
* Calculate the slashable downtime window with respect to a provided start/end block numbers and length.
* @param startBlock First block of the downtime. Determined from endBlock if not provided.
* @param endBlock Last block of the downtime. Determined from startBlock or grandparent of latest block if not provided.
* @param length Length of downtime. Determined from minimum slashable downtime if not provided.
*/
DowntimeSlasherWrapper.prototype.getSlashableDowntimeWindow = function (startBlock, endBlock, length) {
return __awaiter(this, void 0, void 0, function () {
var _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
if (!!length) return [3 /*break*/, 2];
return [4 /*yield*/, this.slashableDowntime()];
case 1:
length = _b.sent();
_b.label = 2;
case 2:
if (!!endBlock) return [3 /*break*/, 6];
if (!startBlock) return [3 /*break*/, 3];
_a = startBlock + length - 1;
return [3 /*break*/, 5];
case 3: return [4 /*yield*/, this.connection.getBlockNumber()];
case 4:
_a = (_b.sent()) - 2; // latest grandparent
_b.label = 5;
case 5:
endBlock = _a; // latest grandparent
_b.label = 6;
case 6: return [2 /*return*/, {
start: startBlock !== null && startBlock !== void 0 ? startBlock : endBlock - length + 1,
end: endBlock,
}];
}
});
});
};
return DowntimeSlasherWrapper;
}(BaseSlasher_1.BaseSlasher));
exports.DowntimeSlasherWrapper = DowntimeSlasherWrapper;
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