I've been trying to watch the Ethereum Alarm Clock contract on the main net (@ 0x6c8f2a135f6ed072de4503bd7c4999a1a17f824b) via Mist. This is the first time I've used Mist to watch contracts and I don't know how to get the JSON description, for example where it says:

In order to watch and interact with a contract already deployed on the blockchain you need to know its address and description of its interface in JSON format.

When I enter the contract address of the Ethereum Alarm Clock I get the following error:

Error in Mist

I went to Browser Solidity and there didn't seem any way of getting the JSON description. I also checked out EtherChain and could only get the EVM code which is useless. What do I need to do here?

1 Answer 1



Further Details

Response to additional question about checksum

The security features refers to the checksum on the address. Before the checksum feature was introduced, addresses like 0x6c8f2a135f6ed072de4503bd7c4999a1a17f824b were all lowercase. I entered this address in etherchain.org and copied the equivalent checksummed address which is 0x6C8f2A135f6ed072DE4503Bd7C4999a1a17F824B. Both versions should work in the Ethereum Wallet.

Here is the blank screen in Ethereum Wallet 0.7.2

A bug report has been lodged. enter image description here

Here is the working screen in Ethereum Wallet 0.6.2

A similar screen is also displayed in 0.5.1 enter image description here

You may want to try 0.6.2, and check the network

You might want to try downloading the old 0.6.2 version of Ethereum Wallet and see if you can load the contract in your screen. The issue you are encountering may be a bug in the new version.

And check that you are using the Main network (menu Develop -> Network).

While submitting the bug report, I when through the recommended steps to check. One of these steps was to load the console (menu Develop -> Toggle Developer Tools -> Wallet UI). The 0.7.2 console showed the message Error: CONNECTION ERROR: Couldn't connect to node on IPC. (...).

  • The problem still happens when I paste in the contract address, even after I put in the ABI. Is there some environmental issues with Mist? "The address looks valid, but it doesn't have some security features that will protect you against typos, so double check you have the right one. If provided, check if the security icon matches."
    – Physes
    Apr 25, 2016 at 21:33
  • I did my original testing on Ethereum Wallet 0.6.2 and it was working. I've now downloaded 0.7.2 and it is not working. Apr 25, 2016 at 22:02
  • Ah, so it must be a compatibility issue. The version I'm using is 0.5.2.
    – Physes
    Apr 25, 2016 at 22:29
  • I've just logged this issue on github.com - github.com/ethereum/mist/issues/515 . Apr 25, 2016 at 22:34
  • One thing you may want to check is that you are on the Main Network (Menu "Develop" -> "Network"). The Ethereum Alarm Clock contract shows up correctly in Ethereum Wallet 0.5.1 as well. Apr 25, 2016 at 22:51

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