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compoundV2Wrapping.fork.ts
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compoundV2Wrapping.fork.ts
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import hre from 'hardhat';
import { expect } from 'chai';
import { BigNumber, Contract } from 'ethers';
import { BigNumberish, bn } from '@helpers/numbers';
import { SignerWithAddress } from '@nomiclabs/hardhat-ethers/signers';
import { MAX_UINT256 } from '@helpers/constants';
import { describeForkTest, impersonate, getForkedNetwork, Task, TaskMode, getSigner } from '@src';
describeForkTest.skip('CompoundV2Wrapping', 'polygon', 40305420, function () {
let task: Task;
let relayer: Contract, library: Contract;
let vault: Contract, authorizer: Contract;
const BRZ = '0x491a4eB4f1FC3BfF8E1d2FC856a6A46663aD556f';
const BRZ_HOLDER = '0xB90B2050C955cd899b9BC8B5C743c25770EBc8AA';
const cBRZ = '0x2e4659b451C3ba2E72D79aAf267cFc09BCCc9d7c';
let brzToken: Contract, cToken: Contract;
let sender: SignerWithAddress, recipient: SignerWithAddress;
let chainedReference: BigNumber;
const amountToWrap = bn(1000e4); // BRZ is 4 decimals
before('run task', async () => {
task = new Task('20230314-batch-relayer-v5', TaskMode.TEST, getForkedNetwork(hre));
await task.run({ force: true });
library = await task.deployedInstance('BatchRelayerLibrary');
relayer = await task.instanceAt('BalancerRelayer', await library.getEntrypoint());
});
before('load vault and tokens', async () => {
const vaultTask = new Task('20210418-vault', TaskMode.READ_ONLY, getForkedNetwork(hre));
vault = await vaultTask.instanceAt('Vault', await library.getVault());
authorizer = await vaultTask.instanceAt('Authorizer', await vault.getAuthorizer());
});
before('approve relayer at the authorizer', async () => {
const relayerActionIds = await Promise.all(
['swap', 'batchSwap', 'joinPool', 'exitPool', 'setRelayerApproval', 'manageUserBalance'].map((action) =>
vault.getActionId(vault.interface.getSighash(action))
)
);
// We impersonate an account with the default admin role in order to be able to approve the relayer. This assumes
// such an account exists.
const admin = await impersonate(await authorizer.getRoleMember(await authorizer.DEFAULT_ADMIN_ROLE(), 0));
// Grant relayer permission to call all relayer functions
await authorizer.connect(admin).grantRoles(relayerActionIds, relayer.address);
});
before(async () => {
brzToken = await task.instanceAt('IERC20', BRZ);
cToken = await task.instanceAt('IERC20', cBRZ);
sender = await impersonate(BRZ_HOLDER);
recipient = await getSigner();
await vault.connect(sender).setRelayerApproval(sender.address, relayer.address, true);
await vault.connect(recipient).setRelayerApproval(recipient.address, relayer.address, true);
});
it('should wrap successfully', async () => {
const balanceOfbrzBefore = await brzToken.balanceOf(sender.address);
const balanceOfcbrzBefore = await cToken.balanceOf(sender.address);
expect(balanceOfcbrzBefore).to.be.equal(0);
// Approving vault to pull tokens from user.
await brzToken.connect(sender).approve(vault.address, amountToWrap);
// Wrap `amountToWrap` BRZ tokens: pull from `sender`, deposit, mint cTokens and transfer to `recipient`.
// Store the amount in an output reference.
chainedReference = toChainedReference(80);
const depositIntoMidas = library.interface.encodeFunctionData('wrapCompoundV2', [
cBRZ,
sender.address,
recipient.address,
amountToWrap,
chainedReference,
]);
await relayer.connect(sender).multicall([depositIntoMidas]);
const balanceOfbrzAfter = await brzToken.balanceOf(sender.address);
expect(balanceOfbrzBefore.sub(balanceOfbrzAfter)).to.be.equal(amountToWrap);
const balanceOfcbrzAfter = await cToken.balanceOf(recipient.address);
expect(balanceOfcbrzAfter).to.be.gt(0);
});
it('should unwrap successfully', async () => {
const balanceOfbrzBefore = await brzToken.balanceOf(recipient.address);
expect(balanceOfbrzBefore).to.be.equal(0);
// Recipient has cTokens. Unwrap by reading amount from the chained reference,
// Pull the cTokens from recipient (sender), burn them, withdraw underlying tokens,
// and transfer to recipient.
const withdrawFromMidas = library.interface.encodeFunctionData('unwrapCompoundV2', [
cBRZ,
recipient.address,
recipient.address,
chainedReference,
0,
]);
await cToken.connect(recipient).approve(vault.address, MAX_UINT256);
await relayer.connect(recipient).multicall([withdrawFromMidas]);
const balanceOfbrzAfter = await brzToken.balanceOf(recipient.address);
const balanceOfcbrzbAfter = await cToken.balanceOf(recipient.address);
expect(balanceOfcbrzbAfter).to.be.equal(0);
expect(balanceOfbrzAfter).to.be.almostEqual(amountToWrap, 0.01);
});
});
function toChainedReference(key: BigNumberish): BigNumber {
const CHAINED_REFERENCE_PREFIX = 'ba10';
// The full padded prefix is 66 characters long, with 64 hex characters and the 0x prefix.
const paddedPrefix = `0x${CHAINED_REFERENCE_PREFIX}${'0'.repeat(64 - CHAINED_REFERENCE_PREFIX.length)}`;
return BigNumber.from(paddedPrefix).add(key);
}