373 lines
16 KiB
TypeScript
373 lines
16 KiB
TypeScript
import { blockchainTests, constants, expect } from '@0x/contracts-test-utils';
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import { IERC20TokenEvents, IERC20TokenTransferEventArgs } from '@0x/contracts-erc20';
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import {
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BlockchainBalanceStore,
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IExchangeEvents,
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IExchangeFillEventArgs,
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LocalBalanceStore,
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} from '@0x/contracts-exchange';
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import {
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constants as stakingConstants,
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IStakingEventsEpochEndedEventArgs,
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IStakingEventsEpochFinalizedEventArgs,
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IStakingEventsEvents,
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IStakingEventsRewardsPaidEventArgs,
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IStakingEventsStakingPoolEarnedRewardsInEpochEventArgs,
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} from '@0x/contracts-staking';
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import { SignedOrder } from '@0x/types';
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import { assetDataUtils, orderHashUtils } from '@0x/order-utils';
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import { toBaseUnitAmount, verifyEvents } from '@0x/contracts-test-utils';
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import { BigNumber } from '@0x/utils';
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import { TransactionReceiptWithDecodedLogs } from 'ethereum-types';
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import { Taker, actorAddressesByName, FeeRecipient, Maker, OperatorStakerMaker, StakerKeeper } from '../actors';
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import { DeploymentManager } from '../utils/deployment_manager';
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blockchainTests.resets('fillOrder integration tests', env => {
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let deployment: DeploymentManager;
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let balanceStore: BlockchainBalanceStore;
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let feeRecipient: FeeRecipient;
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let operator: OperatorStakerMaker;
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let maker: Maker;
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let taker: Taker;
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let delegator: StakerKeeper;
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let poolId: string;
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before(async () => {
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deployment = await DeploymentManager.deployAsync(env, {
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numErc20TokensToDeploy: 2,
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numErc721TokensToDeploy: 0,
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numErc1155TokensToDeploy: 0,
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});
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const [makerToken, takerToken] = deployment.tokens.erc20;
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feeRecipient = new FeeRecipient({
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name: 'Fee recipient',
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deployment,
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});
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const orderConfig = {
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feeRecipientAddress: feeRecipient.address,
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makerAssetData: assetDataUtils.encodeERC20AssetData(makerToken.address),
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takerAssetData: assetDataUtils.encodeERC20AssetData(takerToken.address),
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makerFeeAssetData: assetDataUtils.encodeERC20AssetData(makerToken.address),
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takerFeeAssetData: assetDataUtils.encodeERC20AssetData(takerToken.address),
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makerFee: constants.ZERO_AMOUNT,
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takerFee: constants.ZERO_AMOUNT,
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};
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operator = new OperatorStakerMaker({
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name: 'Pool operator',
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deployment,
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orderConfig,
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});
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maker = new Maker({
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name: 'Maker',
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deployment,
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orderConfig,
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});
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taker = new Taker({ name: 'Taker', deployment });
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delegator = new StakerKeeper({ name: 'Delegator', deployment });
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await operator.configureERC20TokenAsync(makerToken);
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await maker.configureERC20TokenAsync(makerToken);
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await taker.configureERC20TokenAsync(takerToken);
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await taker.configureERC20TokenAsync(deployment.tokens.weth, deployment.staking.stakingProxy.address);
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await operator.configureERC20TokenAsync(deployment.tokens.zrx);
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await delegator.configureERC20TokenAsync(deployment.tokens.zrx);
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// Create a staking pool with the operator as a maker.
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poolId = await operator.createStakingPoolAsync(0.95 * stakingConstants.PPM, true);
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// A vanilla maker joins the pool as well.
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await maker.joinStakingPoolAsync(poolId);
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const tokenOwners = {
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...actorAddressesByName([feeRecipient, operator, maker, taker, delegator]),
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StakingProxy: deployment.staking.stakingProxy.address,
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ZrxVault: deployment.staking.zrxVault.address,
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};
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const tokenContracts = {
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erc20: { makerToken, takerToken, ZRX: deployment.tokens.zrx, WETH: deployment.tokens.weth },
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};
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balanceStore = new BlockchainBalanceStore(tokenOwners, tokenContracts);
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await balanceStore.updateBalancesAsync();
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});
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function simulateFill(
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order: SignedOrder,
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txReceipt: TransactionReceiptWithDecodedLogs,
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msgValue: BigNumber = DeploymentManager.protocolFee,
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): LocalBalanceStore {
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const localBalanceStore = LocalBalanceStore.create(balanceStore);
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// Transaction gas cost
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localBalanceStore.burnGas(txReceipt.from, DeploymentManager.gasPrice.times(txReceipt.gasUsed));
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// Taker -> Maker
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localBalanceStore.transferAsset(taker.address, maker.address, order.takerAssetAmount, order.takerAssetData);
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// Maker -> Taker
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localBalanceStore.transferAsset(maker.address, taker.address, order.makerAssetAmount, order.makerAssetData);
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// Protocol fee
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if (msgValue.isGreaterThanOrEqualTo(DeploymentManager.protocolFee)) {
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localBalanceStore.sendEth(
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txReceipt.from,
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deployment.staking.stakingProxy.address,
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DeploymentManager.protocolFee,
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);
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msgValue = msgValue.minus(DeploymentManager.protocolFee);
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} else {
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localBalanceStore.transferAsset(
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taker.address,
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deployment.staking.stakingProxy.address,
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DeploymentManager.protocolFee,
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assetDataUtils.encodeERC20AssetData(deployment.tokens.weth.address),
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);
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}
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return localBalanceStore;
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}
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function verifyFillEvents(order: SignedOrder, receipt: TransactionReceiptWithDecodedLogs): void {
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// Ensure that the fill event was correct.
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verifyEvents<IExchangeFillEventArgs>(
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receipt,
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[
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{
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makerAddress: maker.address,
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feeRecipientAddress: feeRecipient.address,
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makerAssetData: order.makerAssetData,
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takerAssetData: order.takerAssetData,
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makerFeeAssetData: order.makerFeeAssetData,
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takerFeeAssetData: order.takerFeeAssetData,
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orderHash: orderHashUtils.getOrderHashHex(order),
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takerAddress: taker.address,
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senderAddress: taker.address,
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makerAssetFilledAmount: order.makerAssetAmount,
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takerAssetFilledAmount: order.takerAssetAmount,
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makerFeePaid: constants.ZERO_AMOUNT,
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takerFeePaid: constants.ZERO_AMOUNT,
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protocolFeePaid: DeploymentManager.protocolFee,
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},
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],
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IExchangeEvents.Fill,
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);
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// Ensure that the transfer events were correctly emitted.
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verifyEvents<IERC20TokenTransferEventArgs>(
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receipt,
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[
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{
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_from: taker.address,
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_to: maker.address,
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_value: order.takerAssetAmount,
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},
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{
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_from: maker.address,
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_to: taker.address,
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_value: order.makerAssetAmount,
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},
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],
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IERC20TokenEvents.Transfer,
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);
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}
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it('should fill an order', async () => {
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// Create and fill the order
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const order = await maker.signOrderAsync();
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const receipt = await taker.fillOrderAsync(order, order.takerAssetAmount);
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// Check balances
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const expectedBalances = simulateFill(order, receipt);
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await balanceStore.updateBalancesAsync();
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balanceStore.assertEquals(expectedBalances);
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// There should have been a fill event and two transfer events. A
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// 'StakingPoolEarnedRewardsInEpoch' event should not be expected because the only staking
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// pool that was created does not have enough stake.
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verifyFillEvents(order, receipt);
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});
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it('should activate a staking pool if it has sufficient stake', async () => {
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// Stake just enough to qualify the pool for rewards.
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await delegator.stakeAsync(toBaseUnitAmount(100), poolId);
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// The delegator, functioning as a keeper, ends the epoch so that delegated stake (theirs
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// and the operator's) becomes active. This puts the staking pool above the minimumPoolStake
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// threshold, so it should be able to earn rewards in the new epoch.
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// Finalizing the pool shouldn't settle rewards because it didn't earn rewards last epoch.
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await delegator.endEpochAsync();
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await delegator.finalizePoolsAsync([poolId]);
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await balanceStore.updateBalancesAsync();
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// Create and fill the order
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const order = await maker.signOrderAsync();
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const receipt = await taker.fillOrderAsync(order, order.takerAssetAmount);
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// Check balances
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const expectedBalances = simulateFill(order, receipt);
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await balanceStore.updateBalancesAsync();
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balanceStore.assertEquals(expectedBalances);
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// In addition to the fill event and two transfer events emitted in the previous test, we
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// now expect a `StakingPoolEarnedRewardsInEpoch` event to be emitted because the staking
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// pool now has enough stake in the current epoch to earn rewards.
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verifyFillEvents(order, receipt);
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const currentEpoch = await deployment.staking.stakingWrapper.currentEpoch.callAsync();
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verifyEvents<IStakingEventsStakingPoolEarnedRewardsInEpochEventArgs>(
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receipt,
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[
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{
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epoch: currentEpoch,
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poolId,
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},
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],
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IStakingEventsEvents.StakingPoolEarnedRewardsInEpoch,
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);
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});
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it('should pay out rewards to operator and delegator', async () => {
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// Operator and delegator each stake some ZRX; wait an epoch so that the stake is active.
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await operator.stakeAsync(toBaseUnitAmount(100), poolId);
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await delegator.stakeAsync(toBaseUnitAmount(50), poolId);
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await delegator.endEpochAsync();
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// Create and fill the order. One order's worth of protocol fees are now available as rewards.
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const order = await maker.signOrderAsync();
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await taker.fillOrderAsync(order, order.takerAssetAmount);
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const rewardsAvailable = DeploymentManager.protocolFee;
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// Fetch the current balances
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await balanceStore.updateBalancesAsync();
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const expectedBalances = LocalBalanceStore.create(balanceStore);
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// End the epoch. This should wrap the staking proxy's ETH balance.
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const endEpochReceipt = await delegator.endEpochAsync();
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const newEpoch = await deployment.staking.stakingWrapper.currentEpoch.callAsync();
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// Check balances
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expectedBalances.wrapEth(
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deployment.staking.stakingProxy.address,
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deployment.tokens.weth.address,
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DeploymentManager.protocolFee,
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);
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expectedBalances.burnGas(delegator.address, DeploymentManager.gasPrice.times(endEpochReceipt.gasUsed));
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await balanceStore.updateBalancesAsync();
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balanceStore.assertEquals(expectedBalances);
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// Check the EpochEnded event
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const weightedDelegatorStake = toBaseUnitAmount(50).times(0.9);
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verifyEvents<IStakingEventsEpochEndedEventArgs>(
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endEpochReceipt,
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[
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{
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epoch: newEpoch.minus(1),
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numPoolsToFinalize: new BigNumber(1),
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rewardsAvailable,
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totalFeesCollected: DeploymentManager.protocolFee,
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totalWeightedStake: toBaseUnitAmount(100).plus(weightedDelegatorStake),
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},
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],
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IStakingEventsEvents.EpochEnded,
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);
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// The rewards are split between the operator and delegator based on the pool's operatorShare
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const operatorReward = rewardsAvailable
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.times(operator.operatorShares[poolId])
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.dividedToIntegerBy(constants.PPM_DENOMINATOR);
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const delegatorReward = rewardsAvailable.minus(operatorReward);
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// Finalize the pool. This should automatically pay the operator in WETH.
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const [finalizePoolReceipt] = await delegator.finalizePoolsAsync([poolId]);
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// Check balances
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expectedBalances.transferAsset(
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deployment.staking.stakingProxy.address,
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operator.address,
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operatorReward,
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assetDataUtils.encodeERC20AssetData(deployment.tokens.weth.address),
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);
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expectedBalances.burnGas(delegator.address, DeploymentManager.gasPrice.times(finalizePoolReceipt.gasUsed));
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await balanceStore.updateBalancesAsync();
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balanceStore.assertEquals(expectedBalances);
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// Check finalization events
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verifyEvents<IStakingEventsRewardsPaidEventArgs>(
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finalizePoolReceipt,
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[
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{
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epoch: newEpoch,
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poolId,
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operatorReward,
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membersReward: delegatorReward,
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},
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],
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IStakingEventsEvents.RewardsPaid,
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);
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verifyEvents<IStakingEventsEpochFinalizedEventArgs>(
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finalizePoolReceipt,
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[
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{
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epoch: newEpoch.minus(1),
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rewardsPaid: rewardsAvailable,
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rewardsRemaining: constants.ZERO_AMOUNT,
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},
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],
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IStakingEventsEvents.EpochFinalized,
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);
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});
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it('should credit rewards from orders made by the operator to their pool', async () => {
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// Stake just enough to qualify the pool for rewards.
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await delegator.stakeAsync(toBaseUnitAmount(100), poolId);
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await delegator.endEpochAsync();
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// Create and fill the order
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const order = await operator.signOrderAsync();
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await taker.fillOrderAsync(order, order.takerAssetAmount);
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// Check that the pool has collected fees from the above fill.
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const poolStats = await deployment.staking.stakingWrapper.getStakingPoolStatsThisEpoch.callAsync(poolId);
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expect(poolStats.feesCollected).to.bignumber.equal(DeploymentManager.protocolFee);
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});
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it('should collect WETH fees and pay out rewards', async () => {
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// Operator and delegator each stake some ZRX; wait an epoch so that the stake is active.
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await operator.stakeAsync(toBaseUnitAmount(100), poolId);
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await delegator.stakeAsync(toBaseUnitAmount(50), poolId);
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await delegator.endEpochAsync();
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// Fetch the current balances
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await balanceStore.updateBalancesAsync();
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// Create and fill the order. One order's worth of protocol fees are now available as rewards.
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const order = await maker.signOrderAsync();
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const receipt = await taker.fillOrderAsync(order, order.takerAssetAmount, { value: constants.ZERO_AMOUNT });
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const rewardsAvailable = DeploymentManager.protocolFee;
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const expectedBalances = simulateFill(order, receipt, constants.ZERO_AMOUNT);
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// End the epoch. This should wrap the staking proxy's ETH balance.
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const endEpochReceipt = await delegator.endEpochAsync();
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// Check balances
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expectedBalances.burnGas(delegator.address, DeploymentManager.gasPrice.times(endEpochReceipt.gasUsed));
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await balanceStore.updateBalancesAsync();
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balanceStore.assertEquals(expectedBalances);
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// The rewards are split between the operator and delegator based on the pool's operatorShare
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const operatorReward = rewardsAvailable
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.times(operator.operatorShares[poolId])
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.dividedToIntegerBy(constants.PPM_DENOMINATOR);
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// Finalize the pool. This should automatically pay the operator in WETH.
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const [finalizePoolReceipt] = await delegator.finalizePoolsAsync([poolId]);
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// Check balances
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expectedBalances.transferAsset(
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deployment.staking.stakingProxy.address,
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operator.address,
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operatorReward,
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assetDataUtils.encodeERC20AssetData(deployment.tokens.weth.address),
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);
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expectedBalances.burnGas(delegator.address, DeploymentManager.gasPrice.times(finalizePoolReceipt.gasUsed));
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await balanceStore.updateBalancesAsync();
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balanceStore.assertEquals(expectedBalances);
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});
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});
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