vacp2p
/
rln-contract
mirror of https://github.com/vacp2p/rln-contract.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fix: remove .transfer from loops

This commit is contained in:
rymnc 2023-03-30 20:23:08 +05:30
parent 2c4ddb0312
commit 99c6625b40
No known key found for this signature in database
GPG Key ID: C740033EE3F41EBD
3 changed files with 135 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
contracts/Rln.sol
View File

@ -23,8 +23,8 @@ error DuplicateIdCommitment();
/// @param givenReceiversLen The length of the receivers array
error MismatchedBatchSize(uint256 givenSecretsLen, uint256 givenReceiversLen);
/// Invalid withdrawal address, when the receiver is the contract itself or 0x0
error InvalidWithdrawalAddress(address to);
/// Invalid receiver address, when the receiver is the contract itself or 0x0
error InvalidReceiverAddress(address to);
/// Member is not registered
error MemberNotRegistered(uint256 idCommitment);
@ -32,6 +32,12 @@ error MemberNotRegistered(uint256 idCommitment);
/// Member has no stake
error MemberHasNoStake(uint256 idCommitment);
/// User has insufficient balance to withdraw
error InsufficientWithdrawalBalance();
/// Contract has insufficient balance to return
error InsufficientContractBalance();
contract RLN {
/// @notice The deposit amount required to register as a member
uint256 public immutable MEMBERSHIP_DEPOSIT;
@ -51,8 +57,11 @@ contract RLN {
/// @notice The membership status of each member
mapping(uint256 => bool) public members;
/// @notice The balance of each user that can be withdrawn
mapping(address => uint256) public withdrawalBalance;
/// @notice The Poseidon hasher contract
IPoseidonHasher public poseidonHasher;
IPoseidonHasher public immutable poseidonHasher;
/// Emitted when a new member is added to the set
/// @param idCommitment The idCommitment of the member
@ -91,8 +100,9 @@ contract RLN {
uint256 requiredDeposit = MEMBERSHIP_DEPOSIT * idCommitmentlen;
if (msg.value != requiredDeposit)
revert InsufficientDeposit(requiredDeposit, msg.value);
for (uint256 i = 0; i < idCommitmentlen; i++) {
_register(idCommitments[i], msg.value / idCommitmentlen);
_register(idCommitments[i], MEMBERSHIP_DEPOSIT);
}
}
@ -113,7 +123,7 @@ contract RLN {
/// Allows a user to slash a batch of members
/// @param secrets array of idSecretHashes
/// @param receivers array of addresses to receive the funds
function withdrawBatch(
function slashBatch(
uint256[] calldata secrets,
address payable[] calldata receivers
) external {
@ -122,23 +132,23 @@ contract RLN {
if (batchSize != receivers.length)
revert MismatchedBatchSize(secrets.length, receivers.length);
for (uint256 i = 0; i < batchSize; i++) {
_withdraw(secrets[i], receivers[i]);
_slash(secrets[i], receivers[i]);
}
}
/// Allows a user to slash a member
/// @param secret The idSecretHash of the member
function withdraw(uint256 secret, address payable receiver) external {
_withdraw(secret, receiver);
function slash(uint256 secret, address payable receiver) external {
_slash(secret, receiver);
}
/// Slashes a member by removing them from the set, and transferring their
/// stake to the receiver
/// @param secret The idSecretHash of the member
/// @param receiver The address to receive the funds
function _withdraw(uint256 secret, address payable receiver) internal {
function _slash(uint256 secret, address payable receiver) internal {
if (receiver == address(this) || receiver == address(0))
revert InvalidWithdrawalAddress(receiver);
revert InvalidReceiverAddress(receiver);
// derive idCommitment
uint256 idCommitment = hash(secret);
@ -154,11 +164,24 @@ contract RLN {
stakedAmounts[idCommitment] = 0;
// refund deposit
receiver.transfer(amountToTransfer);
withdrawalBalance[receiver] += amountToTransfer;
emit MemberWithdrawn(idCommitment);
}
/// Allows a user to withdraw funds allocated to them upon slashing a member
function withdraw() external {
uint256 amount = withdrawalBalance[msg.sender];
if (amount == 0) revert InsufficientWithdrawalBalance();
if (amount > address(this).balance)
revert InsufficientContractBalance();
withdrawalBalance[msg.sender] = 0;
payable(msg.sender).transfer(amount);
}
/// Hashes a value using the Poseidon hasher
/// NOTE: The variant of Poseidon we use accepts only 1 input, assume n=2, and the second input is 0
/// @param input The value to hash

50
docs/index.md
View File

@ -890,13 +890,13 @@ Batch size mismatch, when the length of secrets and receivers are not equal
| givenSecretsLen | uint256 | The length of the secrets array |
| givenReceiversLen | uint256 | The length of the receivers array |
## InvalidWithdrawalAddress
## InvalidReceiverAddress
```solidity
error InvalidWithdrawalAddress(address to)
error InvalidReceiverAddress(address to)
```
Invalid withdrawal address, when the receiver is the contract itself or 0x0
Invalid receiver address, when the receiver is the contract itself or 0x0
## MemberNotRegistered
@ -914,6 +914,22 @@ error MemberHasNoStake(uint256 idCommitment)
Member has no stake
## InsufficientWithdrawalBalance
```solidity
error InsufficientWithdrawalBalance()
```
User has insufficient balance to withdraw
## InsufficientContractBalance
```solidity
error InsufficientContractBalance()
```
Contract has insufficient balance to return
## RLN
### MEMBERSHIP_DEPOSIT
@ -964,6 +980,14 @@ mapping(uint256 => bool) members
The membership status of each member
### withdrawalBalance
```solidity
mapping(address => uint256) withdrawalBalance
```
The balance of each user that can be withdrawn
### poseidonHasher
```solidity
@ -1050,10 +1074,10 @@ Registers a member
| idCommitment | uint256 | The idCommitment of the member |
| stake | uint256 | The amount of eth staked by the member |
### withdrawBatch
### slashBatch
```solidity
function withdrawBatch(uint256[] secrets, address payable[] receivers) external
function slashBatch(uint256[] secrets, address payable[] receivers) external
```
Allows a user to slash a batch of members
@ -1065,10 +1089,10 @@ Allows a user to slash a batch of members
| secrets | uint256[] | array of idSecretHashes |
| receivers | address payable[] | array of addresses to receive the funds |
### withdraw
### slash
```solidity
function withdraw(uint256 secret, address payable receiver) external
function slash(uint256 secret, address payable receiver) external
```
Allows a user to slash a member
@ -1080,10 +1104,10 @@ Allows a user to slash a member
| secret | uint256 | The idSecretHash of the member |
| receiver | address payable | |
### \_withdraw
### \_slash
```solidity
function _withdraw(uint256 secret, address payable receiver) internal
function _slash(uint256 secret, address payable receiver) internal
```
Slashes a member by removing them from the set, and transferring their
@ -1096,6 +1120,14 @@ stake to the receiver
| secret | uint256 | The idSecretHash of the member |
| receiver | address payable | The address to receive the funds |
### withdraw
```solidity
function withdraw() external
```
Allows a user to withdraw funds allocated to them upon slashing a member
### hash
```solidity

85
test/RLN.t.sol
View File

@ -167,10 +167,7 @@ contract RLNTest is Test {
rln.registerBatch{value: badDepositAmount}(idCommitments);
}
function test__ValidWithdraw(
uint256 idSecretHash,
address payable to
) public {
function test__ValidSlash(uint256 idSecretHash, address payable to) public {
// avoid precompiles, etc
// TODO: wrap both of these in a single function
assumePayable(to);
@ -182,52 +179,51 @@ contract RLNTest is Test {
assertEq(rln.stakedAmounts(idCommitment), MEMBERSHIP_DEPOSIT);
uint256 balanceBefore = to.balance;
rln.withdraw(idSecretHash, to);
rln.slash(idSecretHash, to);
vm.prank(to);
rln.withdraw();
assertEq(rln.stakedAmounts(idCommitment), 0);
assertEq(rln.members(idCommitment), false);
assertEq(to.balance, balanceBefore + MEMBERSHIP_DEPOSIT);
}
function test__InvalidWithdraw__ToZeroAddress() public {
function test__InvalidSlash__ToZeroAddress() public {
uint256 idSecretHash = 19014214495641488759237505126948346942972912379615652741039992445865937985820;
uint256 idCommitment = poseidon.hash(idSecretHash);
rln.register{value: MEMBERSHIP_DEPOSIT}(idCommitment);
assertEq(rln.stakedAmounts(idCommitment), MEMBERSHIP_DEPOSIT);
vm.expectRevert(
abi.encodeWithSelector(
InvalidWithdrawalAddress.selector,
address(0)
)
abi.encodeWithSelector(InvalidReceiverAddress.selector, address(0))
);
rln.withdraw(idSecretHash, payable(address(0)));
rln.slash(idSecretHash, payable(address(0)));
}
function test__InvalidWithdraw__ToRlnAddress() public {
function test__InvalidSlash__ToRlnAddress() public {
uint256 idSecretHash = 19014214495641488759237505126948346942972912379615652741039992445865937985820;
uint256 idCommitment = poseidon.hash(idSecretHash);
rln.register{value: MEMBERSHIP_DEPOSIT}(idCommitment);
assertEq(rln.stakedAmounts(idCommitment), MEMBERSHIP_DEPOSIT);
vm.expectRevert(
abi.encodeWithSelector(
InvalidWithdrawalAddress.selector,
InvalidReceiverAddress.selector,
address(rln)
)
);
rln.withdraw(idSecretHash, payable(address(rln)));
rln.slash(idSecretHash, payable(address(rln)));
}
function test__InvalidWithdraw__InvalidIdCommitment(
function test__InvalidSlash__InvalidIdCommitment(
uint256 idSecretHash
) public {
uint256 idCommitment = poseidon.hash(idSecretHash);
vm.expectRevert(
abi.encodeWithSelector(MemberNotRegistered.selector, idCommitment)
);
rln.withdraw(idSecretHash, payable(address(this)));
rln.slash(idSecretHash, payable(address(this)));
}
// this shouldn't be possible, but just in case
function test__InvalidWithdraw__NoStake(
function test__InvalidSlash__NoStake(
uint256 idSecretHash,
address payable to
) public {
@ -240,7 +236,7 @@ contract RLNTest is Test {
rln.register{value: MEMBERSHIP_DEPOSIT}(idCommitment);
assertEq(rln.stakedAmounts(idCommitment), MEMBERSHIP_DEPOSIT);
rln.withdraw(idSecretHash, to);
rln.slash(idSecretHash, to);
assertEq(rln.stakedAmounts(idCommitment), 0);
assertEq(rln.members(idCommitment), false);
@ -255,10 +251,10 @@ contract RLNTest is Test {
vm.expectRevert(
abi.encodeWithSelector(MemberHasNoStake.selector, idCommitment)
);
rln.withdraw(idSecretHash, to);
rln.slash(idSecretHash, to);
}
function test__ValidBatchWithdraw(
function test__ValidBatchSlash(
uint256[] calldata idSecretHashes,
address payable to
) public {
@ -281,7 +277,7 @@ contract RLNTest is Test {
}
uint256 balanceBefore = to.balance;
rln.withdrawBatch(
rln.slashBatch(
idSecretHashes,
repeatElementIntoArray(idSecretHashes.length, to)
);
@ -289,20 +285,22 @@ contract RLNTest is Test {
assertEq(rln.stakedAmounts(idCommitments[i]), 0);
assertEq(rln.members(idCommitments[i]), false);
}
vm.prank(to);
rln.withdraw();
assertEq(
to.balance,
balanceBefore + MEMBERSHIP_DEPOSIT * idCommitmentlen
);
}
function test__InvalidBatchWithdraw__EmptyBatch() public {
function test__InvalidBatchSlash__EmptyBatch() public {
uint256[] memory idSecretHashes = new uint256[](0);
address payable[] memory to = new address payable[](0);
vm.expectRevert(EmptyBatch.selector);
rln.withdrawBatch(idSecretHashes, to);
rln.slashBatch(idSecretHashes, to);
}
function test__InvalidBatchWithdraw__MismatchInputSize(
function test__InvalidBatchSlash__MismatchInputSize(
uint256[] calldata idSecretHashes,
address payable to
) public {
@ -319,9 +317,46 @@ contract RLNTest is Test {
numberOfReceivers
)
);
rln.withdrawBatch(
rln.slashBatch(
idSecretHashes,
repeatElementIntoArray(numberOfReceivers, to)
);
}
function test__InvalidWithdraw__InsufficientWithdrawalBalance() public {
vm.expectRevert(InsufficientWithdrawalBalance.selector);
rln.withdraw();
}
function test__InvalidWithdraw__InsufficientContractBalance() public {
uint256 idSecretHash = 19014214495641488759237505126948346942972912379615652741039992445865937985820;
uint256 idCommitment = poseidon.hash(idSecretHash);
rln.register{value: MEMBERSHIP_DEPOSIT}(idCommitment);
assertEq(rln.stakedAmounts(idCommitment), MEMBERSHIP_DEPOSIT);
rln.slash(idSecretHash, payable(address(this)));
assertEq(rln.stakedAmounts(idCommitment), 0);
assertEq(rln.members(idCommitment), false);
vm.deal(address(rln), 0);
vm.expectRevert(InsufficientContractBalance.selector);
rln.withdraw();
}
function test__ValidWithdraw(address payable to) public {
assumePayable(to);
assumeNoPrecompiles(to);
uint256 idSecretHash = 19014214495641488759237505126948346942972912379615652741039992445865937985820;
uint256 idCommitment = poseidon.hash(idSecretHash);
rln.register{value: MEMBERSHIP_DEPOSIT}(idCommitment);
assertEq(rln.stakedAmounts(idCommitment), MEMBERSHIP_DEPOSIT);
rln.slash(idSecretHash, to);
assertEq(rln.stakedAmounts(idCommitment), 0);
assertEq(rln.members(idCommitment), false);
vm.prank(to);
rln.withdraw();
assertEq(rln.withdrawalBalance(to), 0);
}
}