rubic-sdk
Version:
Simplify dApp creation
88 lines • 5.16 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CurveAbstractProvider = void 0;
const bignumber_js_1 = __importDefault(require("bignumber.js"));
const errors_1 = require("../../../../../../../common/errors");
const tokens_1 = require("../../../../../../../common/tokens");
const blockchain_1 = require("../../../../../../../common/utils/blockchain");
const options_1 = require("../../../../../../../common/utils/options");
const evm_web3_pure_1 = require("../../../../../../../core/blockchain/web3-pure/typed-web3-pure/evm-web3-pure/evm-web3-pure");
const on_chain_trade_type_1 = require("../../../common/models/on-chain-trade-type");
const address_provider_abi_1 = require("./constants/address-provider-abi");
const registry_abi_1 = require("./constants/registry-abi");
const registry_exchange_abi_1 = require("./constants/registry-exchange-abi");
const evm_provider_default_options_1 = require("../on-chain-provider/evm-on-chain-provider/constants/evm-provider-default-options");
const evm_on_chain_provider_1 = require("../on-chain-provider/evm-on-chain-provider/evm-on-chain-provider");
class CurveAbstractProvider extends evm_on_chain_provider_1.EvmOnChainProvider {
constructor() {
super(...arguments);
this.addressProvider = '0x0000000022D53366457F9d5E68Ec105046FC4383';
this.defaultOptions = {
...evm_provider_default_options_1.evmProviderDefaultOptions,
deadlineMinutes: 20,
disableMultihops: false
};
}
get type() {
return on_chain_trade_type_1.ON_CHAIN_TRADE_TYPE.CURVE;
}
async calculate(fromToken, toToken, options) {
const fromAddress = fromToken.isNative
? CurveAbstractProvider.nativeAddress
: fromToken.address;
const toAddress = toToken.isNative ? CurveAbstractProvider.nativeAddress : toToken.address;
const fromAmount = fromToken.stringWeiAmount;
const registryExchangeAddress = await this.fetchRegistryExchangeAddress();
const registryAddress = await this.fetchRegistryAddress();
let poolAddress = await this.fetchPoolAddress(fromAddress, toAddress, registryAddress);
if ((0, blockchain_1.compareAddresses)(poolAddress, evm_web3_pure_1.EvmWeb3Pure.EMPTY_ADDRESS)) {
const bestRate = await this.fetchBestRate(fromAddress, toAddress, fromAmount, registryExchangeAddress);
poolAddress = bestRate[0];
}
if ((0, blockchain_1.compareAddresses)(poolAddress, evm_web3_pure_1.EvmWeb3Pure.EMPTY_ADDRESS)) {
throw new errors_1.RubicSdkError('Token is not supported.');
}
const amountOut = await this.fetchExchangeAmount(fromAddress, toAddress, fromAmount, poolAddress, registryExchangeAddress);
const fullOptions = (0, options_1.combineOptions)(options, this.defaultOptions);
const { fromWithoutFee, proxyFeeInfo } = await this.handleProxyContract(fromToken, fullOptions);
const to = await tokens_1.PriceTokenAmount.createFromToken({
...toToken.asStruct,
weiAmount: new bignumber_js_1.default(amountOut)
});
const tradeStruct = {
from: fromToken,
to,
slippageTolerance: fullOptions.slippageTolerance,
gasFeeInfo: null,
useProxy: fullOptions.useProxy,
proxyFeeInfo,
fromWithoutFee,
withDeflation: fullOptions.withDeflation,
path: [fromToken, toToken],
registryExchangeAddress,
poolAddress
};
return new this.Trade(tradeStruct, fullOptions.providerAddress);
}
async fetchRegistryExchangeAddress() {
return this.web3Public.callContractMethod(this.addressProvider, address_provider_abi_1.addressProviderAbi, 'get_address', ['2']);
}
async fetchRegistryAddress() {
return this.web3Public.callContractMethod(this.addressProvider, address_provider_abi_1.addressProviderAbi, 'get_address', ['0']);
}
async fetchPoolAddress(fromAddress, toAddress, registryAddress) {
return this.web3Public.callContractMethod(registryAddress, registry_abi_1.registryAbi, 'find_pool_for_coins', [fromAddress, toAddress]);
}
async fetchBestRate(fromAddress, toAddress, fromAmount, registryExchangeAddress) {
return this.web3Public.callContractMethod(registryExchangeAddress, registry_exchange_abi_1.registryExchangeAbi, 'get_best_rate', [fromAddress, toAddress, fromAmount]);
}
async fetchExchangeAmount(fromAddress, toAddress, fromAmount, poolAddress, registryExchangeAddress) {
return this.web3Public.callContractMethod(registryExchangeAddress, registry_exchange_abi_1.registryExchangeAbi, 'get_exchange_amount', [poolAddress, fromAddress, toAddress, fromAmount]);
}
}
exports.CurveAbstractProvider = CurveAbstractProvider;
CurveAbstractProvider.nativeAddress = '0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE';
//# sourceMappingURL=curve-abstract-provider.js.map