@andrekorol/kollateral
Version:
Typescript library for Kollateral, the flash loan building block
269 lines • 14.2 kB
JavaScript
"use strict";
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};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Kollateral = void 0;
var bignumber_js_1 = require("bignumber.js");
var utils_1 = require("./util/utils");
var web3_1 = __importDefault(require("web3"));
var network_1 = require("./static/network");
var invoker_1 = require("./static/invoker");
var tokens_1 = require("./static/tokens");
var ktokens_1 = require("./static/ktokens");
var Kollateral = /** @class */ (function () {
function Kollateral(provider, config) {
var _this = this;
this._provider = provider;
this._config = config;
this._web3 = new web3_1.default(provider);
var invokerAbi = require('./abi/Invoker.json').abi;
this._invoker = new this._web3.eth.Contract(invokerAbi, config.invokerAddress);
var kEtherAbi = require('./abi/KEther.json').abi;
this._kEther = new this._web3.eth.Contract(kEtherAbi, config.network.tokens.get(tokens_1.Token.ETH).kTokenAddress);
var kErc20Abi = require('./abi/KErc20.json').abi;
this._kErc20s = new Map();
var kTokenAbi = require('./abi/KToken.json').abi;
this._kTokens = new Map();
this._erc20Abi = require('./abi/TestToken.json').abi;
config.network.tokens.forEach(function (config, token) {
if (token != tokens_1.Token.ETH) {
_this._kErc20s.set(config.kTokenAddress, new _this._web3.eth.Contract(kErc20Abi, config.kTokenAddress));
}
_this._kTokens.set(config.kTokenAddress, new _this._web3.eth.Contract(kTokenAbi, config.kTokenAddress));
});
}
Kollateral.init = function (provider) {
return __awaiter(this, void 0, void 0, function () {
var networkId, network, config;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, new web3_1.default(provider).eth.net.getId()];
case 1:
networkId = _a.sent();
network = network_1.NetworkUtils.fromId(networkId);
/* Fail if not a complete static config available for network */
if (!Kollateral.isSupportedNetwork(network)) {
throw ("Unsupported Network");
}
config = {
invokerAddress: invoker_1.InvokerUtils.getAddress(network),
network: {
network: network,
tokens: new Map(tokens_1.TokenUtils.getSupportedTokens(network)
.map(function (token) { return [token, {
tokenAddress: tokens_1.TokenUtils.getAddress(network, token),
kTokenAddress: ktokens_1.KTokenUtils.getAddress(network, token)
}]; }))
}
};
return [2 /*return*/, new Kollateral(provider, config)];
}
});
});
};
Kollateral.isSupportedNetwork = function (network) {
return ([network_1.Network.Ropsten, network_1.Network.Rinkeby, network_1.Network.Mainnet].includes(network));
};
/* KToken Supplying */
Kollateral.prototype.unlock = function (sender, kTokenAddress) {
return this.unlockAmount(sender, kTokenAddress, Kollateral.MAX_UINT256);
};
Kollateral.prototype.unlockAmount = function (sender, kTokenAddress, amount) {
return __awaiter(this, void 0, void 0, function () {
var tokenAddress;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._kTokens.get(kTokenAddress).methods.underlying().call()];
case 1:
tokenAddress = _a.sent();
return [2 /*return*/, this.tokenOf(tokenAddress).methods.approve(kTokenAddress, amount.toFixed()).send({
from: sender
})];
}
});
});
};
Kollateral.prototype.allowance = function (owner, kTokenAddress) {
return __awaiter(this, void 0, void 0, function () {
var tokenAddress;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this._kTokens.get(kTokenAddress).methods.underlying().call()];
case 1:
tokenAddress = _a.sent();
return [2 /*return*/, this.tokenOf(tokenAddress).methods.allowance(owner, kTokenAddress).call().then(function (bn) { return utils_1.Utils.bnToBigNumber(bn); })];
}
});
});
};
Kollateral.prototype.isUnlocked = function (owner, kTokenAddress) {
return __awaiter(this, void 0, void 0, function () {
var allowance;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.allowance(owner, kTokenAddress)];
case 1:
allowance = _a.sent();
return [2 /*return*/, allowance.eq(Kollateral.MAX_UINT256)];
}
});
});
};
Kollateral.prototype.mint = function (sender, kTokenAddress, amount) {
if (this.isKEtherAddress(kTokenAddress)) {
return this._kEther.methods.mint().send({
from: sender,
value: amount.toFixed()
});
}
else {
return this._kErc20s.get(kTokenAddress).methods.mint(amount.toFixed()).send({
from: sender
});
}
};
Kollateral.prototype.redeem = function (sender, kTokenAddress, amount) {
return this._kTokens.get(kTokenAddress).methods.redeem(amount.toFixed()).send({
from: sender
});
};
Kollateral.prototype.redeemUnderlying = function (sender, kTokenAddress, amount) {
return this._kTokens.get(kTokenAddress).methods.redeemUnderlying(amount.toFixed()).send({
from: sender
});
};
Kollateral.prototype.isKEtherAddress = function (kTokenAddress) {
return kTokenAddress == this._config.network.tokens.get(tokens_1.Token.ETH).kTokenAddress;
};
Kollateral.prototype.balanceOf = function (owner, tokenAddress) {
return this.tokenOf(tokenAddress).methods.balanceOf(owner).call()
.then(function (bn) { return utils_1.Utils.bnToBigNumber(bn); });
};
Kollateral.prototype.balanceOfUnderlying = function (owner, kTokenAddress) {
return this._kTokens.get(kTokenAddress).methods.balanceOfUnderlying(owner).call()
.then(function (bn) { return utils_1.Utils.bnToBigNumber(bn); });
};
Kollateral.prototype.underlyingAmountToNativeAmount = function (kTokenAddress, tokenAmount, ceiling) {
if (ceiling === void 0) { ceiling = false; }
return this._kTokens.get(kTokenAddress).methods.underlyingAmountToNativeAmount(tokenAmount.toFixed(), ceiling).call()
.then(function (bn) { return utils_1.Utils.bnToBigNumber(bn); });
};
Kollateral.prototype.nativeAmountToUnderlyingAmount = function (kTokenAddress, kTokenAmount) {
return this._kTokens.get(kTokenAddress).methods.nativeAmountToUnderlyingAmount(kTokenAmount.toFixed()).call()
.then(function (bn) { return utils_1.Utils.bnToBigNumber(bn); });
};
Kollateral.prototype.totalSupply = function (tokenAddress) {
return this.tokenOf(tokenAddress).methods.totalSupply().call()
.then(function (bn) { return utils_1.Utils.bnToBigNumber(bn); });
};
Kollateral.prototype.totalReserve = function (kTokenAddress) {
return this._kTokens.get(kTokenAddress).methods.totalReserve().call()
.then(function (bn) { return utils_1.Utils.bnToBigNumber(bn); });
};
Kollateral.prototype.tokenOf = function (tokenAddress) {
return new this._web3.eth.Contract(this._erc20Abi, tokenAddress);
};
/* Invocation */
Kollateral.prototype.invoke = function (execution, tokenAmount, txOpt) {
if (txOpt === void 0) { txOpt = {}; }
return __awaiter(this, void 0, void 0, function () {
var _a, tokenAddress;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
if (!(txOpt.from == undefined)) return [3 /*break*/, 2];
_a = txOpt;
return [4 /*yield*/, this._web3.eth.getAccounts()];
case 1:
_a.from = (_b.sent())[0];
_b.label = 2;
case 2:
txOpt.value = this.valueOrDefault(execution.value).toFixed();
tokenAddress = this.getTokenAddressOrThrow(tokenAmount.token);
return [2 /*return*/, this._invoker.methods.invoke(execution.contract, this.dataOrDefault(execution.data), tokenAddress, utils_1.Utils.normalizeNumber(tokenAmount.amount).toFixed()).send(txOpt)];
}
});
});
};
Kollateral.prototype.totalLiquidity = function (token) {
var tokenAddress = this.getTokenAddressOrThrow(token);
return this._invoker.methods.totalLiquidity(tokenAddress).call()
.then(function (bn) { return utils_1.Utils.bnToBigNumber(bn); });
};
/* Testnet */
Kollateral.prototype.faucet = function (sender, tokenAmount) {
var tokenAddress = this.getTokenAddressOrThrow(tokenAmount.token);
var token = new this._web3.eth.Contract(this._erc20Abi, tokenAddress);
return token.methods.mint(utils_1.Utils.normalizeNumber(tokenAmount.amount).toFixed()).send({
from: sender
});
};
/* Private */
Kollateral.prototype.getTokenAddressOrThrow = function (token) {
if (!tokens_1.TokenUtils.isSupportedToken(this._config.network.network, token)) {
throw ("Unsupported token");
}
return tokens_1.TokenUtils.getAddress(this._config.network.network, token);
};
Kollateral.prototype.valueOrDefault = function (value) {
return utils_1.Utils.normalizeNumber(value == undefined ? 0 : value);
};
Kollateral.prototype.dataOrDefault = function (data) {
return data == undefined ? [] : data;
};
Kollateral.MAX_UINT256 = new bignumber_js_1.BigNumber('FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF', 16);
return Kollateral;
}());
exports.Kollateral = Kollateral;
__exportStar(require("./static/tokens"), exports);
__exportStar(require("./static/ktokens"), exports);
__exportStar(require("./static/network"), exports);
__exportStar(require("./static/invoker"), exports);
//# sourceMappingURL=kollateral.js.map