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update universalTransferFrom logic, and comments

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This commit is contained in:
andyk 2020-06-03 15:48:59 +03:00
parent a41816b32c
commit 43ae2f36e7
1 changed files with 13 additions and 6 deletions
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19
contracts/libraries/UniversalERC20.sol
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@ -22,6 +22,8 @@ library UniversalERC20 {
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
);
uint256 private constant DEFAULT_TRANSFER_GAS = 50000;
/**
* @dev Moves amount of asset from caller to recipient
* @param token underlying asset address
@ -38,7 +40,10 @@ library UniversalERC20 {
}
if (isETH(token)) {
(bool result, ) = payable(to).call{value: amount, gas: 50000}("");
(bool result, ) = payable(to).call{
value: amount,
gas: DEFAULT_TRANSFER_GAS
}("");
require(result, "ETH_TRANSFER_FAILED");
} else {
token.safeTransfer(to, amount);
@ -47,6 +52,7 @@ library UniversalERC20 {
/**
* @dev Moves amount of asset from sender to recipient
* in terms of ETH it redirects amount in transaction to recipient
* @param token underlying asset address
* @param from asset sender
* @param to asset recipient
@ -70,15 +76,16 @@ library UniversalERC20 {
"Wrong usage of ETH.universalTransferFrom()"
); // TODO: think one more time from == msg.sender
if (to != address(this)) {
(bool result, ) = payable(to).call{value: amount, gas: 50000}(
""
);
(bool result, ) = payable(to).call{
value: amount,
gas: DEFAULT_TRANSFER_GAS
}("");
require(result, "ETH_TRANSFER_FAILED");
}
if (returnExcess && msg.value > amount) {
(bool result, ) = msg.sender.call{
(bool result, ) = payable(from).call{
value: msg.value.sub(amount),
gas: 50000
gas: DEFAULT_TRANSFER_GAS
}("");
require(result, "ETH_TRANSFER_FAILED");
}