I am trying to send a transaction using the Etherscan write contract tool at the following address: https://kovan.etherscan.io/address/0x7a250d5630b4cf539739df2c5dacb4c659f2488d#writeContract
The method I wish to use is: swapExactTokensForToken
And the parameters are:
amountIn: 100000000000000000 (0.1 ETH) amountOutMin: 1400000000000000000 path: [0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2,0x25e1474170c4c0aa64fa98123bdc8db49d7802fa] To: destination address timestamp: 1602450476
I have tried that, but the transaction fails with an error 'TransferHelper: TRANSFER_FROM_FAILED'.
I had a look at the code fro TransferHelper.sol but I cannot find the problem.
Can someone explain why this fails?