86 lines
3.9 KiB
TypeScript
86 lines
3.9 KiB
TypeScript
import { GlobalStakeByStatus, OwnerStakeByStatus, StakeStatus, StoredBalance } from '@0x/contracts-staking';
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import { expect } from '@0x/contracts-test-utils';
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import { BigNumber, logUtils } from '@0x/utils';
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import { TxData } from 'ethereum-types';
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import { BlockchainBalanceStore } from '../balances/blockchain_balance_store';
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import { LocalBalanceStore } from '../balances/local_balance_store';
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import { DeploymentManager } from '../deployment_manager';
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import { FunctionAssertion, FunctionResult } from './function_assertion';
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function expectedUndelegatedStake(
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initStake: OwnerStakeByStatus | GlobalStakeByStatus,
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amount: BigNumber,
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): StoredBalance {
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return {
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currentEpoch: initStake[StakeStatus.Undelegated].currentEpoch,
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currentEpochBalance: initStake[StakeStatus.Undelegated].currentEpochBalance.plus(amount),
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nextEpochBalance: initStake[StakeStatus.Undelegated].nextEpochBalance.plus(amount),
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};
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}
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/**
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* Returns a FunctionAssertion for `stake` which assumes valid input is provided. The
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* FunctionAssertion checks that the staker and zrxVault's balances of ZRX decrease and increase,
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* respectively, by the input amount.
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*/
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/* tslint:disable:no-unnecessary-type-assertion */
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export function validStakeAssertion(
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deployment: DeploymentManager,
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balanceStore: BlockchainBalanceStore,
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globalStake: GlobalStakeByStatus,
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ownerStake: OwnerStakeByStatus,
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): FunctionAssertion<[BigNumber], LocalBalanceStore, void> {
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const { stakingWrapper, zrxVault } = deployment.staking;
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return new FunctionAssertion(stakingWrapper.stake.bind(stakingWrapper), {
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before: async (args: [BigNumber], txData: Partial<TxData>) => {
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const [amount] = args;
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// Simulates the transfer of ZRX from staker to vault
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const expectedBalances = LocalBalanceStore.create(balanceStore);
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expectedBalances.transferAsset(
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txData.from!, // tslint:disable-line:no-non-null-assertion
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zrxVault.address,
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amount,
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deployment.assetDataEncoder.ERC20Token(deployment.tokens.zrx.address).getABIEncodedTransactionData(),
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);
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return expectedBalances;
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},
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after: async (
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expectedBalances: LocalBalanceStore,
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_result: FunctionResult,
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args: [BigNumber],
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txData: Partial<TxData>,
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) => {
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const [amount] = args;
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logUtils.log(`stake(${amount})`);
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// Checks that the ZRX transfer updated balances as expected.
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await balanceStore.updateErc20BalancesAsync();
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balanceStore.assertEquals(expectedBalances);
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// Checks that the owner's undelegated stake has increased by the stake amount
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const ownerUndelegatedStake = await stakingWrapper
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.getOwnerStakeByStatus(txData.from!, StakeStatus.Undelegated) // tslint:disable-line:no-non-null-assertion
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.callAsync();
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const expectedOwnerUndelegatedStake = expectedUndelegatedStake(ownerStake, amount);
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expect(ownerUndelegatedStake, 'Owner undelegated stake').to.deep.equal(expectedOwnerUndelegatedStake);
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// Updates local state accordingly
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ownerStake[StakeStatus.Undelegated] = expectedOwnerUndelegatedStake;
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// Checks that the global undelegated stake has also increased by the stake amount
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const globalUndelegatedStake = await stakingWrapper
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.getGlobalStakeByStatus(StakeStatus.Undelegated)
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.callAsync();
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const expectedGlobalUndelegatedStake = expectedUndelegatedStake(globalStake, amount);
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expect(globalUndelegatedStake, 'Global undelegated stake').to.deep.equal(expectedGlobalUndelegatedStake);
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// Updates local state accordingly
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globalStake[StakeStatus.Undelegated] = expectedGlobalUndelegatedStake;
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},
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});
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}
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/* tslint:enable:no-unnecessary-type-assertion */
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