Fail to verify with zos verify

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Hi,

I’m trying to verify our logic contract 0xf8146b5796135faa7929a5c0e91fd4bfcc01ab9e used as the implementation of proxy contract 0x6fe56c0bcdd471359019fcbc48863d6c3e9d4f41

I’ve tried the verify option but there’s an error:
zos --verbose verify PropsToken
? Pick a network mainnet
? Was your contract compiled with optimizations enabled? No
? Choose a remote endpoint etherscan
? Enter your Etherscan API key (get one at https://etherscan.io/myapikey) XXXXXXXXXXVRRB
[2020-08-09T18:34:24.573Z@NetworkController.js#verifyAndPublishContract] Verifying and publishing contract source code of PropsToken on etherscan (this usually takes under 30 seconds)

[2020-08-10T14:02:32.558Z@errors.js#call] Error: Error while trying to verify contract: Fail - Unable to verify
at /Users/jretina/.nvm/versions/node/v8.11.1/lib/node_modules/@openzeppelin/cli/lib/models/Verifier.js:119:19
at Generator.throw ()
at rejected (/Users/jretina/.nvm/versions/node/v8.11.1/lib/node_modules/@openzeppelin/cli/lib/models/Verifier.js:6:65)
at
at process._tickCallback (internal/process/next_tick.js:188:7)

I also tried to do this on etherscan manually by outputting In Verifier.js the “flattened” contract.
At first it didn’t compile due to missing _approve function.
I added it and tried again but failed due to bytecode not matching (see image)

:computer: Environment
Zos 2.8 (was deployed with 2.2)
Compiler 0.4.24? I’m

image
image750×306 71.4 KB

Source code for contracts:

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2

Hey @jachai! I’ve just managed to verify the contract using etherscan’s UI, using 0.4.24 with optimization disabled. Not sure what the problem was in the first place.

1 Like
3

Hi @jachai,

Welcome to the community. :wave:

Thanks @spalladino for verifying the implementation contract :pray:

Etherscan has implemented reading and writing for proxy contracts.
It can be found in More Options -> Is this a Proxy.

I have set this for your contract so that the community can read/write as a proxy.