I just checked IDAX out... (for clarity, this is: https://www.idax.mn it is a centralised exchange and is NOT IDEX)

IDAX seems to provide the same deposit address for ETH as for all the tokens that they support. So, theoretically, if you sent ETH, it should have been credited to your IDAX account balance. What ERC20 Token address did you send to? And did you check that your ETH and token addresses are the same for your IDAX account?


You haven't sent a cross-chain transaction. ERC20 and ETH transactions all occur on the ETH network... as ERC20 tokens piggyback on ETH.