hueso/p2pix-smart-contracts
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Replace deposit prices for ETH premium.

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This commit is contained in:
Filipe Soccol
2022-11-09 16:29:27 -03:00
parent 1892e0bd9b
commit d57fbde4c0
5 changed files with 126 additions and 101 deletions
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56
contracts/p2pix.sol
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@@ -2,22 +2,24 @@
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract P2PIX {
contract P2PIX is Ownable {
event DepositAdded(address indexed seller, bytes32 depositID, address token, uint256 price, uint256 amount);
event DepositAdded(address indexed seller, bytes32 depositID, address token, uint256 premium, uint256 amount);
event DepositClosed(address indexed seller, bytes32 depositID);
event DepositWithdrawn(address indexed seller, bytes32 depositID, uint256 amount);
event DepositPriceChanged(bytes32 indexed depositID, uint256 price);
event LockAdded(address indexed buyer, bytes32 indexed lockID, bytes32 depositID, uint256 amount, uint256 locked);
event LockAdded(address indexed buyer, bytes32 indexed lockID, bytes32 depositID, uint256 amount);
event LockReleased(address indexed buyer, bytes32 lockId);
event LockReturned(address indexed buyer, bytes32 lockId);
// Events
event PremiumsWithdrawn(address owner, uint256 amount);
struct Deposit {
address seller;
address token; // ERC20 stable token address
uint256 remaining; // Remaining tokens available
uint256 price; // Price in R$ per token
uint256 premium; // Premium paid in ETH for priority
bool valid; // Could be invalidated by the seller
string pixTarget; // The PIX account for the seller receive transactions
}
@@ -28,7 +30,6 @@ contract P2PIX {
address relayerAddress; // Relayer address that facilitated this transaction
uint256 relayerPremium; // Amount to be paid for relayer
uint256 amount; // Amount to be tranfered via PIX
uint256 locked; // Amount locked in tokens from deposit
uint256 expirationBlock; // If not paid at this block will be expired
}
@@ -49,7 +50,7 @@ contract P2PIX {
_;
}
constructor (uint256 defaultBlocks, address[] memory validSigners) {
constructor (uint256 defaultBlocks, address[] memory validSigners) Ownable() {
defaultLockBlocks = defaultBlocks;
for (uint8 i = 0; i < validSigners.length; i++){
validBacenSigners[validSigners[i]] = true;
@@ -60,16 +61,15 @@ contract P2PIX {
function deposit(
address token,
uint256 amount,
uint256 price,
string calldata pixTarget
) public returns (bytes32 depositID){
) public payable returns (bytes32 depositID){
depositID = keccak256(abi.encodePacked(pixTarget, amount));
require(!mapDeposits[depositID].valid, 'P2PIX: Deposit already exist and it is still valid');
IERC20 t = IERC20(token);
t.transferFrom(msg.sender, address(this), amount);
Deposit memory d = Deposit(msg.sender, token, amount, price, true, pixTarget);
Deposit memory d = Deposit(msg.sender, token, amount, msg.value, true, pixTarget);
mapDeposits[depositID] = d;
emit DepositAdded(msg.sender, depositID, token, price, amount);
emit DepositAdded(msg.sender, depositID, token, msg.value, amount);
}
// Vendedor pode invalidar da ordem de venda impedindo novos locks na mesma (isso não afeta nenhum lock que esteja ativo).
@@ -95,8 +95,7 @@ contract P2PIX {
unlockExpired(expiredLocks);
Deposit storage d = mapDeposits[depositID];
require(d.valid, "P2PIX: Deposit not valid anymore");
uint256 toLock = (amount * 1 ether) / d.price;
require(d.remaining >= toLock, "P2PIX: Not enough token remaining on deposit");
require(d.remaining >= amount, "P2PIX: Not enough token remaining on deposit");
lockID = keccak256(abi.encodePacked(depositID, amount, targetAddress));
require(
mapLocks[lockID].expirationBlock < block.number,
@@ -108,12 +107,11 @@ contract P2PIX {
relayerAddress,
relayerPremium,
amount,
toLock,
block.number+defaultLockBlocks
);
mapLocks[lockID] = l;
d.remaining -= toLock;
emit LockAdded(targetAddress, lockID, depositID, amount, toLock);
d.remaining -= amount;
emit LockAdded(targetAddress, lockID, depositID, amount);
}
// Relayer interage com o smart contract, colocando no calldata o comprovante do PIX realizado.
@@ -127,7 +125,7 @@ contract P2PIX {
) public {
// TODO **Prevenir que um Pix não relacionado ao APP seja usado pois tem o mesmo destino
Lock storage l = mapLocks[lockID];
require(l.expirationBlock > block.number && l.locked > 0, "P2PIX: Lock already released or returned");
require(l.expirationBlock > block.number && l.amount > 0, "P2PIX: Lock already released or returned");
Deposit storage d = mapDeposits[l.depositID];
bytes32 message = keccak256(abi.encodePacked(
mapDeposits[l.depositID].pixTarget,
@@ -139,29 +137,22 @@ contract P2PIX {
address signer = ecrecover(messageDigest, v, r, s);
require(validBacenSigners[signer], "P2PIX: Signer is not a valid signer");
IERC20 t = IERC20(d.token);
t.transfer(l.targetAddress, l.locked-l.relayerPremium);
t.transfer(l.targetAddress, l.amount-l.relayerPremium);
if (l.relayerPremium > 0) t.transfer(l.relayerAddress, l.relayerPremium);
l.locked = 0;
l.amount = 0;
l.expirationBlock = 0;
usedTransactions[message] = true;
emit LockReleased(l.targetAddress, lockID);
}
// Change price for deposit amount
function changeDepositPrice(bytes32 depositID, uint256 price) public onlySeller(depositID) {
Deposit storage d = mapDeposits[depositID];
d.price = price;
emit DepositPriceChanged(depositID, price);
}
// Unlock expired locks
function unlockExpired(bytes32[] calldata lockIDs) public {
uint256 locksSize = lockIDs.length;
for (uint16 i = 0; i < locksSize; i++){
Lock storage l = mapLocks[lockIDs[i]];
require(l.expirationBlock < block.number && l.locked > 0, "P2PIX: Lock not expired or already released");
mapDeposits[l.depositID].remaining += l.locked;
l.locked = 0;
require(l.expirationBlock < block.number && l.amount > 0, "P2PIX: Lock not expired or already released");
mapDeposits[l.depositID].remaining += l.amount;
l.amount = 0;
emit LockReturned(l.targetAddress, lockIDs[i]);
}
}
@@ -182,4 +173,11 @@ contract P2PIX {
emit DepositWithdrawn(msg.sender, depositID, amount);
}
// O dono do contrato pode sacar os premiums pagos
function withdrawPremiums() external onlyOwner {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
emit PremiumsWithdrawn(msg.sender, balance);
}
}