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Merge pull request #21 from GigaHierz/LILA-5502/remove-functionality-…
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…to-hold-funds-from-offsethelper

P2: [LILA-5502] Remove functionality to hold funds in the OffsetHelper
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@GigaHierz
GigaHierz committed Oct 2, 2023
2 parents f98e5ef + 390d210 commit af92bbf
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Showing 3 changed files with 16 additions and 186 deletions.
59 changes: 7 additions & 52 deletions contracts/OffsetHelper.sol
View file
Original file line number Diff line number Diff line change
Expand Up @@ -325,7 +325,11 @@ contract OffsetHelper is OffsetHelperStorage {
uint256 _amountToOffset
) public returns (address[] memory tco2s, uint256[] memory amounts) {
// deposit pool token from user to this contract
deposit(_poolToken, _amountToOffset);
IERC20(_poolToken).safeTransferFrom(
msg.sender,
address(this),
_amountToOffset
);

// redeem BCT / NCT for TCO2s
(tco2s, amounts) = autoRedeem(_poolToken, _amountToOffset);
Expand All @@ -351,7 +355,7 @@ contract OffsetHelper is OffsetHelperStorage {
returns (address[] memory tco2s, uint256[] memory amounts)
{
require(
balances[msg.sender][_fromToken] >= _amount,
IERC20(_fromToken).balanceOf(address(this)) >= _amount,
"Insufficient NCT/BCT balance"
);

Expand All @@ -361,16 +365,6 @@ contract OffsetHelper is OffsetHelperStorage {
// auto redeem pool token for TCO2; will transfer automatically picked TCO2 to this contract
(tco2s, amounts) = PoolTokenImplementation.redeemAuto2(_amount);

// update balances
balances[msg.sender][_fromToken] -= _amount;
uint256 tco2sLen = tco2s.length;
for (uint256 i; i < tco2sLen; ) {
balances[msg.sender][tco2s[i]] += amounts[i];
unchecked {
i++;
}
}

emit Redeemed(msg.sender, _fromToken, tco2s, amounts);
}

Expand All @@ -394,12 +388,10 @@ contract OffsetHelper is OffsetHelperStorage {
continue;
}
require(
balances[msg.sender][_tco2s[i]] >= _amounts[i],
IERC20(_tco2s[i]).balanceOf(address(this)) >= _amounts[i],
"Insufficient TCO2 balance"
);

balances[msg.sender][_tco2s[i]] -= _amounts[i];

IToucanCarbonOffsets(_tco2s[i]).retire(_amounts[i]);
}
}
Expand Down Expand Up @@ -439,9 +431,6 @@ contract OffsetHelper is OffsetHelperStorage {
if (amounts[0] < amountIn) {
IERC20(_fromToken).approve(dexRouterAddress, 0);
}

// update balances
balances[msg.sender][_poolToken] += _toAmount;
}

/**
Expand Down Expand Up @@ -489,9 +478,6 @@ contract OffsetHelper is OffsetHelperStorage {
block.timestamp
);
amountOut = amounts[len - 1];

// update balances
balances[msg.sender][_poolToken] += amountOut;
}

/**
Expand Down Expand Up @@ -524,9 +510,6 @@ contract OffsetHelper is OffsetHelperStorage {

require(success, "Failed to send surplus back");
}

// update balances
balances[msg.sender][_poolToken] += _toAmount;
}

/**
Expand Down Expand Up @@ -559,34 +542,6 @@ contract OffsetHelper is OffsetHelperStorage {
value: fromAmount
}(0, path, address(this), block.timestamp);
amountOut = amounts[len - 1];

// update balances
balances[msg.sender][_poolToken] += amountOut;
}

/**
* @notice Allow users to withdraw tokens they have deposited.
*/
function withdraw(address _erc20Addr, uint256 _amount) public {
require(
balances[msg.sender][_erc20Addr] >= _amount,
"Insufficient balance"
);

IERC20(_erc20Addr).safeTransfer(msg.sender, _amount);
balances[msg.sender][_erc20Addr] -= _amount;
}

/**
* @notice Allow users to deposit BCT / NCT.
* @dev Needs to be approved
*/
function deposit(
address _erc20Addr,
uint256 _amount
) public onlyRedeemable(_erc20Addr) {
IERC20(_erc20Addr).safeTransferFrom(msg.sender, address(this), _amount);
balances[msg.sender][_erc20Addr] += _amount;
}

// ----------------------------------------
Expand Down
3 changes: 0 additions & 3 deletions contracts/OffsetHelperStorage.sol
View file
Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,4 @@ contract OffsetHelperStorage is Ownable {
string[] public tokenSymbolsForPaths;
address[][] public paths;
address public dexRouterAddress;

// user => (token => amount)
mapping(address => mapping(address => uint256)) public balances;
}
140 changes: 9 additions & 131 deletions test/OffsetHelper.test.ts
View file
Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,8 @@ describe("OffsetHelper", function () {
return {
offsetHelper,
weth,
nct,
bct,
testToken,
usdc,
owner,
Expand Down Expand Up @@ -587,7 +589,7 @@ describe("OffsetHelper", function () {
});

it(`should redeem ${name.toUpperCase()} from deposit`, async function () {
const { offsetHelper, owner, tokens } = await loadFixture(
const { offsetHelper, owner, bct, nct, tokens } = await loadFixture(
deployOffsetHelperFixture
);
// extracting the the pool token for this loop
Expand All @@ -614,8 +616,8 @@ describe("OffsetHelper", function () {
await poolToken.token().approve(offsetHelper.address, ONE_ETHER)
).wait();
await (
await offsetHelper.deposit(
networkPoolAddress[poolToken.name],
await (poolToken.name === "BCT" ? bct : nct).transfer(
offsetHelper.address,
ONE_ETHER
)
).wait();
Expand Down Expand Up @@ -702,7 +704,7 @@ describe("OffsetHelper", function () {

for (const name of TOKEN_POOLS) {
it(`should retire using an ${name.toUpperCase()} deposit`, async function () {
const { offsetHelper, owner, tokens } = await loadFixture(
const { offsetHelper, owner, bct, nct, tokens } = await loadFixture(
deployOffsetHelperFixture
);
// extracting the the pool token for this loop
Expand All @@ -729,8 +731,8 @@ describe("OffsetHelper", function () {
await poolToken.token().approve(offsetHelper.address, ONE_ETHER)
).wait();
await (
await offsetHelper.deposit(
networkPoolAddress[poolToken.name],
await (poolToken.name === "BCT" ? bct : nct).transfer(
offsetHelper.address,
ONE_ETHER
)
).wait();
Expand Down Expand Up @@ -835,120 +837,6 @@ describe("OffsetHelper", function () {
}
});

describe("#deposit() and #withdraw()", function () {
for (const name of TOKEN_POOLS) {
it(`should fail to deposit because we have no ${name.toUpperCase()}`, async function () {
const { offsetHelper, addrs, tokens } = await loadFixture(
deployOffsetHelperFixture
);
// extracting the the pool token for this loop
const poolToken = tokens[name];

await (
await poolToken
.token()
.connect(addrs[0])
.approve(offsetHelper.address, ONE_ETHER)
).wait();

await expect(
offsetHelper
.connect(addrs[0])
.deposit(networkPoolAddress[poolToken.name], ONE_ETHER)
).to.be.revertedWith("ERC20: transfer amount exceeds balance");
});

it(`should deposit and withdraw 1.0 ${name.toUpperCase()}`, async function () {
const { offsetHelper, owner, tokens } = await loadFixture(
deployOffsetHelperFixture
);
const poolToken = tokens[name];

const preDepositPoolTokenBalance = await poolToken
.token()
.balanceOf(owner.address);

await (
await poolToken.token().approve(offsetHelper.address, ONE_ETHER)
).wait();

await (
await offsetHelper.deposit(
networkPoolAddress[poolToken.name],
ONE_ETHER
)
).wait();

await (
await offsetHelper.withdraw(
networkPoolAddress[poolToken.name],
ONE_ETHER
)
).wait();

const postWithdrawPoolTokenBalance = await poolToken
.token()
.balanceOf(owner.address);

expect(formatEther(postWithdrawPoolTokenBalance)).to.be.eql(
formatEther(preDepositPoolTokenBalance)
);
});

it(`should fail to withdraw because we haven't deposited enough ${name.toUpperCase()}`, async function () {
const { offsetHelper, tokens } = await loadFixture(
deployOffsetHelperFixture
);
const poolToken = tokens[name];

await (
await poolToken.token().approve(offsetHelper.address, ONE_ETHER)
).wait();

await (
await offsetHelper.deposit(
networkPoolAddress[poolToken.name],
ONE_ETHER
)
).wait();

await expect(
offsetHelper.withdraw(
networkPoolAddress[poolToken.name],
parseEther("2.0")
)
).to.be.revertedWith("Insufficient balance");
});

it(`should deposit 1.0 ${name.toUpperCase()}`, async function () {
const { offsetHelper, owner, tokens } = await loadFixture(
deployOffsetHelperFixture
);
const poolToken = tokens[name];

await (
await poolToken.token().approve(offsetHelper.address, ONE_ETHER)
).wait();

await (
await offsetHelper.deposit(
networkPoolAddress[poolToken.name],
ONE_ETHER
)
).wait();

expect(
formatEther(
await offsetHelper.balances(
owner.address,
networkPoolAddress[poolToken.name]
)
)
).to.be.eql("1.0");
});
}
});

describe("#swapExactOut{ETH,Token}() for pool token", function () {
for (const name of TOKEN_POOLS) {
it(`should swap native Token, e.g., MATIC for 1.0 ${name.toUpperCase()}`, async function () {
Expand Down Expand Up @@ -1034,7 +922,7 @@ describe("OffsetHelper", function () {
});

it(`should swap WETH for 1.0 ${name.toUpperCase()}`, async function () {
const { offsetHelper, weth, owner, tokens } = await loadFixture(
const { offsetHelper, weth, tokens } = await loadFixture(
deployOffsetHelperFixture
);
const poolToken = tokens[name];
Expand Down Expand Up @@ -1064,16 +952,6 @@ describe("OffsetHelper", function () {
expect(formatEther(balance)).to.be.eql(
formatEther(initialBalance.add(ONE_ETHER))
);

// I expect that the user should have his in-contract balance for pool token to be 1.0
expect(
formatEther(
await offsetHelper.balances(
owner.address,
networkPoolAddress[poolToken.name]
)
)
).to.be.eql("1.0");
});
}
});
Expand Down

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