59 lines
1.9 KiB
Solidity
59 lines
1.9 KiB
Solidity
pragma solidity ^0.6.1;
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pragma experimental ABIEncoderV2;
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import "./Bucket.sol";
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import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol";
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contract ERC20Bucket is Bucket {
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uint256 public redeemableSupply;
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constructor(
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address _tokenAddress,
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uint256 _startTime,
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uint256 _expirationTime,
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uint256 _maxTxDelayInBlocks) Bucket("KeycardERC20Bucket", _tokenAddress, _startTime, _expirationTime, _maxTxDelayInBlocks) public {}
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function totalSupply() public view returns(uint256) {
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return IERC20(tokenAddress).balanceOf(address(this));
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}
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function availableSupply() public view returns(uint256) {
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uint256 _totalSupply = this.totalSupply();
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require(_totalSupply >= redeemableSupply, "redeemableSupply is greater than redeemableSupply");
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return _totalSupply - redeemableSupply;
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}
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function createRedeemable(address recipient, uint256 amount, bytes32 code) external onlyOwner {
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require(amount > 0, "invalid amount");
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uint256 _availableSupply = this.availableSupply();
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require(_availableSupply >= amount, "low supply");
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Redeemable storage redeemable = redeemables[recipient];
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require(redeemable.recipient == address(0), "recipient already used");
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redeemable.recipient = recipient;
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redeemable.code = code;
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redeemable.data = amount;
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require(redeemableSupply + amount > redeemableSupply, "addition overflow");
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redeemableSupply += amount;
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}
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function transferRedeemable(uint256 data, Redeem memory redeem) internal override {
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require(redeemableSupply >= data, "not enough redeemable supply");
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redeemableSupply -= data;
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IERC20(tokenAddress).transfer(redeem.receiver, data);
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}
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function transferRedeemablesToOwner() internal override {
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bool success = IERC20(tokenAddress).transfer(owner(), this.totalSupply());
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assert(success);
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}
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function bucketType() external override returns (uint256) {
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return 20;
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}
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}
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