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updated curve adapter + added new one
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,77 @@ | ||
| pragma solidity 0.6.2; | ||
| pragma experimental ABIEncoderV2; | ||
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| import { Adapter } from "./Adapter.sol"; | ||
| import { Component } from "../Structs.sol"; | ||
| import { ERC20 } from "../ERC20.sol"; | ||
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| /** | ||
| * @dev YToken contract interface. | ||
| * Only the functions required for CurveYAdapter contract are added. | ||
| * The YToken contracts are available here | ||
| * https://github.com/iearn-finance/itoken/tree/master/contracts. | ||
| */ | ||
| interface YToken { | ||
| function token() external view returns (address); | ||
| function getPricePerFullShare() external view returns (uint256); | ||
| } | ||
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| /** | ||
| * @dev stableswap contract interface. | ||
| * Only the functions required for CurveYAdapter contract are added. | ||
| * The stableswap contract is available here | ||
| * https://github.com/curvefi/curve-contract/blob/compounded/vyper/stableswap.vy. | ||
| */ | ||
| // solhint-disable-next-line contract-name-camelcase | ||
| interface stableswap { | ||
| function coins(int128) external view returns (address); | ||
| function balances(int128) external view returns(uint256); | ||
| } | ||
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| /** | ||
| * @title Adapter for Curve protocol. | ||
| * @dev Implementation of Adapter interface. | ||
| */ | ||
| contract CurveYAdapter is Adapter { | ||
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| address constant internal SS = 0x45F783CCE6B7FF23B2ab2D70e416cdb7D6055f51; | ||
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| /** | ||
| * @return Name of the protocol. | ||
| * @dev Implementation of Adapter function. | ||
| */ | ||
| function getProtocolName() external pure override returns (string memory) { | ||
| return("Curve ∙ Y pool"); | ||
| } | ||
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| /** | ||
| * @return Amount of stableswapToken locked on the protocol by the given user. | ||
| * @dev Implementation of Adapter function. | ||
| */ | ||
| function getAssetAmount(address asset, address user) external view override returns (int256) { | ||
| return int256(ERC20(asset).balanceOf(user)); | ||
| } | ||
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| /** | ||
| * @return Struct with underlying assets rates for the given asset. | ||
| * @dev Implementation of Adapter function. | ||
| * Repeats calculations made in stableswap contract. | ||
| */ | ||
| function getUnderlyingRates(address asset) external view override returns (Component[] memory) { | ||
| Component[] memory components = new Component[](4); | ||
| stableswap ss = stableswap(SS); | ||
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| for (uint256 i = 0; i < 4; i++) { | ||
| YToken yToken = YToken(ss.coins(int128(i))); | ||
| components[i] = Component({ | ||
| underlying: yToken.token(), | ||
| rate: ss.balances(int128(i)) * yToken.getPricePerFullShare() / ERC20(asset).totalSupply() | ||
| }); | ||
| } | ||
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| return components; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| const { BN } = web3.utils; | ||
| const AdapterRegistry = artifacts.require('./AdapterRegistry'); | ||
| const CurveAdapter = artifacts.require('./CurveYAdapter'); | ||
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| contract('CurveYAdapter', () => { | ||
| const ssTokenAddress = '0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8'; | ||
| const DAIAddress = '0x6B175474E89094C44Da98b954EedeAC495271d0F'; | ||
| const USDCAddress = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'; | ||
| const USDTAddress = '0xdAC17F958D2ee523a2206206994597C13D831ec7'; | ||
| const TUSDAddress = '0x0000000000085d4780B73119b644AE5ecd22b376'; | ||
| const testAddress = '0x42b9dF65B219B3dD36FF330A4dD8f327A6Ada990'; | ||
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| let accounts; | ||
| let adapterRegistry; | ||
| let curveAdapter; | ||
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| beforeEach(async () => { | ||
| accounts = await web3.eth.getAccounts(); | ||
| await CurveAdapter.new({ from: accounts[0] }) | ||
| .then((result) => { | ||
| curveAdapter = result.contract; | ||
| }); | ||
| await AdapterRegistry.new( | ||
| [curveAdapter.options.address], | ||
| [[ssTokenAddress]], | ||
| { from: accounts[0] }, | ||
| ) | ||
| .then((result) => { | ||
| adapterRegistry = result.contract; | ||
| }); | ||
| }); | ||
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| it('should return correct balances and rates', async () => { | ||
| await adapterRegistry.methods['getBalancesAndRates(address)'](testAddress) | ||
| .call() | ||
| .then((result) => { | ||
| const base = new BN(10).pow(new BN(18)); | ||
| const ssTokenAmount = new BN(result[0].balances[0].amount); | ||
| const DAIRate = new BN(result[0].rates[0].components[0].rate); | ||
| const DAIAmount = DAIRate.mul(ssTokenAmount).div(base).toString(); | ||
| const USDCRate = new BN(result[0].rates[0].components[1].rate); | ||
| const USDCAmount = USDCRate.mul(ssTokenAmount).div(base).toString(); | ||
| const USDTRate = new BN(result[0].rates[0].components[2].rate); | ||
| const USDTAmount = USDTRate.mul(ssTokenAmount).div(base).toString(); | ||
| const TUSDRate = new BN(result[0].rates[0].components[3].rate); | ||
| const TUSDAmount = TUSDRate.mul(ssTokenAmount).div(base).toString(); | ||
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| // eslint-disable-next-line no-console | ||
| console.log(`Deposited ssToken amount: ${ssTokenAmount.toString()}`); | ||
| assert.equal(result[0].balances[0].decimals, 18); | ||
| assert.equal(result[0].balances[0].asset, ssTokenAddress); | ||
| assert.equal(result[0].rates[0].asset, ssTokenAddress); | ||
| assert.equal(result[0].rates[0].components[0].underlying, DAIAddress); | ||
| // eslint-disable-next-line no-console | ||
| console.log(`DAI rate: ${DAIRate.toString()}`); | ||
| // eslint-disable-next-line no-console | ||
| console.log(`Means its: ${DAIAmount} DAI locked`); | ||
| assert.equal(result[0].rates[0].components[1].underlying, USDCAddress); | ||
| // eslint-disable-next-line no-console | ||
| console.log(`USDC rate: ${USDCRate.toString()}`); | ||
| // eslint-disable-next-line no-console | ||
| console.log(`Means its: ${USDCAmount} USDC locked`); | ||
| assert.equal(result[0].rates[0].components[2].underlying, USDTAddress); | ||
| // eslint-disable-next-line no-console | ||
| console.log(`USDT rate: ${USDTRate.toString()}`); | ||
| // eslint-disable-next-line no-console | ||
| console.log(`Means its: ${USDTAmount} USDT locked`); | ||
| assert.equal(result[0].rates[0].components[3].underlying, TUSDAddress); | ||
| // eslint-disable-next-line no-console | ||
| console.log(`TUSD rate: ${TUSDRate.toString()}`); | ||
| // eslint-disable-next-line no-console | ||
| console.log(`Means its: ${TUSDAmount} TUSD locked`); | ||
| assert.equal(result[0].name, 'Curve ∙ Y pool'); | ||
| }); | ||
| }); | ||
| }); |