I really need help with this one to avoid logic errors.

I am on the Kovan testnet.

I bought 4 units of DAI token on Uniswap exchange(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D) for 0.111 Ether and tried to sell it on the same exchange; it worked fine.

Then I bought 4 units of DAI token on Uniswap exchange and tried to sell it on Kyber Exchange(0x692f391bCc85cefCe8C237C01e1f636BbD70EA4D); but it failed.

To buy DAI token on Uniswap, I passed it the Uniswap DAI token address(0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa) and to sell the purchased DAI tokens on Kyber exchange, I passed it the address of the Kyber DAI token(0xFf795577d9AC8bD7D90Ee22b6C1703490b6512FD)

Since this didn't work , I decided that Kyber Exchange must want the original address of the DAI tokens on Uniswap, so I passed it instead. It worked.

Though it worked, I am wary of logic errors and I want to be sure:


To sell a Uniswap DAI token on Kyber Exchange, do I pass the Uniswap DAI token address to the kyber exchange or do I use the Kyber DAI token address.

Also, am I allowed to sell across exchanges on testnets like kovan?

Do forgive the naïveté of the question, but I have been quite bothered by it.

Thanks a lot.


1 Answer 1


The issue here is that 0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa and 0xFf795577d9AC8bD7D90Ee22b6C1703490b6512FD aren't the same token. They are both tokens on Kovan, but since they aren't the same address, they aren't the same token. According to MakerDAO, the official DAI address on Kovan is the one that Uniswap is using (0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa). I believe Kyber just created their own token called DAI to make it easier for them to test their platform on Kovan.

  • So, if I buy 0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa on Uniswap, and I want to sell it on Kyber, I reference it with the same: 0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa, right? Jul 15, 2020 at 0:30
  • Correct. The same address is the same token, but it doesn't look like Kyber even has the official Kovan DAI token in their system, so you still wont be able to sell it on Kovan Kyber
    – natewelch_
    Jul 16, 2020 at 14:45
  • Thanks so much @flygoing. This question has bothered me a lot. Many forums danced around the question and never answered it in a sway I could grasp easily. Jul 17, 2020 at 19:59

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