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additional eth for the recipient

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Alexey 2019-08-27 23:42:24 +03:00
parent 0f5a5df522
commit 9f33aadd9d
14 changed files with 113 additions and 83 deletions
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25
contracts/ETHMixer.sol
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@ -14,30 +14,45 @@ pragma solidity ^0.5.8;
import "./Mixer.sol";
contract ETHMixer is Mixer {
uint256 public etherDenomination;
constructor(
address _verifier,
uint256 _transferValue,
uint256 _etherDenomination,
uint8 _merkleTreeHeight,
uint256 _emptyElement,
address payable _operator
) Mixer(_verifier, _transferValue, _merkleTreeHeight, _emptyElement, _operator) public {}
) Mixer(_verifier, _merkleTreeHeight, _emptyElement, _operator) public {
etherDenomination = _etherDenomination;
}
/**
@dev Deposit funds into mixer. The caller must send value equal to `etherDenomination` of this mixer.
@param commitment the note commitment, which is PedersenHash(nullifier + secret)
*/
function deposit(uint256 commitment) public payable {
require(msg.value == transferValue, "Please send `transferValue` ETH along with transaction");
require(msg.value == etherDenomination, "Please send `etherDenomination` ETH along with transaction");
_deposit(commitment);
emit Deposit(commitment, next_index - 1, block.timestamp);
}
/**
@dev Withdraw deposit from the mixer. `a`, `b`, and `c` are zkSNARK proof data, and input is an array of circuit public inputs
`input` array consists of:
- merkle root of all deposits in the mixer
- hash of unique deposit nullifier to prevent double spends
- the receiver of funds
- optional fee that goes to the transaction sender (usually a relay)
*/
function withdraw(uint256[2] memory a, uint256[2][2] memory b, uint256[2] memory c, uint256[4] memory input) public {
_withdraw(a, b, c, input);
address payable receiver = address(input[2]);
uint256 fee = input[3];
uint256 nullifierHash = input[1];
require(fee < transferValue, "Fee exceeds transfer value");
receiver.transfer(transferValue - fee);
require(fee < etherDenomination, "Fee exceeds transfer value");
receiver.transfer(etherDenomination - fee);
if (fee > 0) {
operator.transfer(fee);
}