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Uniswap is a decentralized finance protocol that is used to exchange cryptocurrencies.
3
votes
Accepted
Swap token to ether through Uni-V2 yields Fail with error 'TransferHelper: ETH_TRANSFER_FAILED'
payable returns (bool) {
address[] memory path = new address[](2);
uint deadline = block.timestamp + 600;
path[0] = token;
path[1] = WETH;
require(IERC20(token).approve(address(uniswap … ), (amountIn + 10000)), 'Uniswap approval failed');
uniswap.swapExactTokensForETH(
amountIn,
1, //MIN FIXED TO 1 FOR TESTING
path,
address(this),
deadline …