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Questions tagged [verify]

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17 votes
5 answers
8k views

How do you verify a contract on etherscan that is deployed by another contract?

How do you properly verify a contract on etherscan that is deployed by another contact? I deployed a contract that deploys other contracts onto the blockchain. The original contract is verified , ...
Dino Anastos's user avatar
18 votes
3 answers
10k views

Etherscan: How can I verify a contract with multiple imports deployed with Truffle?

When I deploy a contract with Truffle that has an import statement, and try to verify it on etherscan, my understanding is that I need to paste in the contents of the imported file. I get an error on ...
Travis Jacobs's user avatar
7 votes
3 answers
3k views

Having trouble verifying a contract on etherscan.io

I'm trying to verify a contract on etherscan.io. The contract itself has a number of imports and libraries and has been deployed using certain constructor arguments. I've copy/pasted the code from ...
o0ragman0o's user avatar
  • 4,330
5 votes
4 answers
2k views

I can't verify my contract on the Rinkeby etherscan site

I'm getting the following error when verifying on the RINKEBY etherscan site: Error! Unable to verify source code Exception #1 Occured: ERROR|The Contract solidity compilation has exceeded the ...
nickjm's user avatar
  • 865
2 votes
1 answer
1k views

Is it possible to verify a given `block hash` is valid in a contract?

Inside my contract, I want to verify a given block hash is valid or not. block_hash_validation(string blockhash) returns (bool){ ...//check() return true; || return false; } Q1: If yes, from ...
alper's user avatar
  • 8,395
0 votes
1 answer
355 views

Is a contract verified and safe if it's created by a verified contract?

The contract source code is not verified as you can see in the picture, but the contract was created by another contract code which is verified. Does that mean that the contract code from the picture ...
Crypto de Grote's user avatar
12 votes
3 answers
17k views

Convert contract arguments from JSON to ABI-encoded format

I want to verify a contract code on Etherscan, but don't know how to get the arguments in ABI-encoded format. I have the source code and the interface in JSON. Is there some tool I can use, or some ...
user avatar
11 votes
3 answers
2k views

Can ZKSnarks be implemented on the Ethereum ecosystem?

Since Zcash seems to have it's ZKSnarks implementation finished (or almost at least). And versions of JPMorgan's Quorum had appeared with ZKsnarks implementations included see: https://www.coindesk....
CPereez19's user avatar
  • 2,835
3 votes
1 answer
1k views

How to verify smart contracts on different solidity versions

I'd like to build my own smart contract verify system with all solidity versions both on single file and multiple files just like what etherscan or other block explorer does. I was able to verify for ...
kimiro's user avatar
  • 165
3 votes
2 answers
1k views

Why doesn't my verification of a signed message signature work in PHP?

I am attempting to verify a signed message in PHP. To be clear, I am not looking to interface with JSON-RPC or any external service, which I both a) know works and b) successfully verifies the ...
EvilJordan's user avatar
3 votes
2 answers
4k views

How do I create ABI encoded constructor argument to verify an Ehtereum contract on etherscan.io when i know the arguments: adress1 uint

I have a contract: https://github.com/slavik0329/BetterAuction that i want to verify here: https://etherscan.io/verifyContract?a=0x3e7a000DC9FE17424cBA7E5bB21390A87a8e32d6 the arguments are: ...
Hans-Ueli M.'s user avatar
3 votes
1 answer
598 views

Cannot verify Contract - bytecode has small difference

I forgot to verify the ERC20 token contract after deploying it. Now after 5 months, Im doing it again and completely forget which compiler and if I accidently change anything on the code. After ...
Brian Nguyen's user avatar
2 votes
3 answers
1k views

How to verify Mist's standard multisig wallet using Etherscan tool?

I've found standard Mist wallet contract code, thanks to another answer. I am trying to verify this contract over and over using different compiler versions but verification fails. Can somebody point ...
21xhipster's user avatar
2 votes
1 answer
3k views

How to verify a signed message and that it hasn't been reused/tampered with?

I have seen this question and others but none answers my qustion. How can I sign a message and make sure that the public key I recover is actually belongs to the private key that signed the message? ...
YulePale's user avatar
  • 1,843
2 votes
0 answers
590 views

How to verify a deployed contract on etherscan

I would love to get some help with this as I'm wracking my brain with how to get this done. I have gone through this link to verify my contract: https://etherscan.io/verifyContract I am puzzled with ...
slutexpress's user avatar
2 votes
0 answers
3k views

Why the value of v is always either 27 (11011) or 28 (11100)?

Why the value of v is always either 27 (11011) or 28 (11100), and, how is it known wether it will be 27 or 28?
schnorr's user avatar
  • 199
1 vote
1 answer
8k views

How to verify a contract having constructor arguments?

This is a contract that requires an argument to be deployed. The Contract Name is "Asset". The compiler used is "Compiler 0.4.16+commit.d7661dd9.Emscripten.clang" and Optimization was Disabled. To ...
Juan Ignacio Pérez Sacristán's user avatar
1 vote
1 answer
1k views

failure to verify truffle compiled contract on ropsten.etherscan.io

Recently just pushed my first smart contract from truffle to the ropsten testnet. As you can see from my terminal output below it compiles and was migrated with no problem: Was broadcast to the ...
smatthewenglish's user avatar