Verify Contracts in BlockScout

Contract verification exposed ABI methods needed to transfer tokens
To invoke contract methods which approve and initiate token transfers, it is important to verify the newly deployed contracts. This provides access to the ABI code.
We will verify the following group of deployed contracts for this demo. You will use your own contract address output to verify your contracts.
Sokol
[ Home ] homeMediator: 0xF190e4EBAF15E66869A3D8252AC48588a75EEf4e
[ Home ] simpleKittyCore: 0x8eb75AD1ab50aB28E78B62fEeDD9EBcF9F040E33
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Kovan
[ Foreign ] foreignMediator: 0x510D85CfB9E50b60700a02AAeD789B1A5Ebe6873
[ Foreign ] kittyCore: 0x9d0c70Bfd1770B7cfbC97AfA8cF1CFcE9659271E
1) Flatten Contracts
Check that you are in the root directory from deployment steps (cryptokitties-xdai-demo ) and run the flatten command.
yarn flatten
flattened contracts will be created in the flats folder.
2) Go to Deployed KittyCore Contract in BlockScout - Kovan  
Example url: https://blockscout.com/eth/kovan/address/0x13AC5C6338796a31A39e74D70B0153C1bE5f53B4/transactions.  You will replace with your [ Foreign ] kittyCore: 0x....... address.
Click on the Code tab, then click the Verify and publish button.
In Code tab you will see the Contract Byte Code. Click Verify & Publish
3) Enter KittyCore Contract Details
Contract Address: Preselected
Contract Name: KittyCore
Compiler: v0.4.24+commit.e67f0147
EVM Version: byzantium
Optimization: Yes
Optimization runs: 200
Enter the Solidity Contract code:  copy code from cryptokitties-xdai-demo/flats/kitty/KittyCore_flat.sol
ABI-encoded Constructor Arguments: leave blank
Click Verify & publish.
Verification parameters are located in the truffle-config file in the root directory. https://github.com/poanetwork/cryptokitties-xdai-demo/blob/master/truffle-config.js#L83-L94​
Enter in Contract Details and click Verify & publish
On success, you will see the verified contract. It will include the contract name under details, along with a ✅ next to the code tab and the ability to Read the Contract.
Verified Contract Example. Note the ability to copy the ABI has been added.
4) Go to Deployed ForeignMediator Proxy Contract in BlockScout - Kovan  
Example url: https://blockscout.com/eth/kovan/address/0x510D85CfB9E50b60700a02AAeD789B1A5Ebe6873/transactions .  You will replace with your [ Foreign ] foreignMediator: 0x....... address.
Click on the Code tab, then click the Verify and Publish button.
5) Enter Mediator Proxy Contract Details
Mediator contracts are actually proxy contracts - so you will verify the flatted proxy contract located at: cryptokitties-xdai-demo/flats/upgradeability/EternalStorageProxy_flat.sol
Contract Address: Preselected
Contract Name: EternalStorageProxy
Compiler: v0.4.24+commit.e67f0147
EVM Version: byzantium
Optimization: Yes
Optimization runs: 200
Enter the Solidity Contract code:  copy code from 
cryptokitties-xdai-demo/flats/upgradeability/EternalStorageProxy_flat.sol
ABI-encoded Constructor Arguments: leave blank
Click Verify & publish
On success, you will see the verified contract. It will include the contract name under details, along with a ✅ next to the code tab and the ability to Read the Contract.
6) Locate and Verify Additional ForeignMediator Contract
Because the previous contract is a proxy contract, you must also find the ForeignMediator contract as well to verify. 
1) After the EternalStorageProxy contract has been verified, go to the Read Contract Tab
2) You will see a 2. implementation -> 0x.....  row. Click on that implementation address.
Click on the implementation address
7) Verify ForeignMediator Contract
Click on the Code tab, then click the Verify and Publish button
Verification Details
Contract Address: Preselected
Contract Name: ForeignMediator
Compiler: v0.4.24+commit.e67f0147
EVM Version: byzantium
Optimization: Yes
Optimization runs: 200
Enter the Solidity Contract code:  copy code from 
cryptokitties-xdai-demo/flats/mediator/ForeignMediator_flat.sol
ABI-encoded Constructor Arguments: leave blank
Click Verify & publish
On success, you will see the verified contract. It will include the contract name under details, along with a ✅ next to the code tab and the ability to Read the Contract.
8) Verify Remaining Contracts in Sokol
You will now follow the same steps to verify the contracts on the Sokol Testnet
https://blockscout.com/poa/sokol 
SimpleKittyCore Parameters
Contract Address: Preselected
Contract Name: SimpleBridgeKitty
Compiler: v0.4.24+commit.e67f0147
EVM Version: byzantium
Optimization: Yes
Optimization runs: 200
Enter the Solidity Contract code:  copy code from cryptokitties-xdai-demo/flats/simpleKitty/SimpleBridgeKitty_flat.sol
ABI-encoded Constructor Arguments: leave blank
Mediator Proxy Contract Parameters
We use the same proxy contract on both chains.
Contract Address: Preselected
Contract Name: EternalStorageProxy
Compiler: v0.4.24+commit.e67f0147
EVM Version: byzantium
Optimization: Yes
Optimization runs: 200
Enter the Solidity Contract code:  copy code from 
cryptokitties-xdai-demo/flats/upgradeability/EternalStorageProxy_flat.sol
ABI-encoded Constructor Arguments: leave blank
HomeMediator Parameters
Contract Address: Preselected
Contract Name: HomeMediator
Compiler: v0.4.24+commit.e67f0147
EVM Version: byzantium
Optimization: Yes
Optimization runs: 200
Enter the Solidity Contract code:  copy code from 
cryptokitties-xdai-demo/flats/mediator/HomeMediator_flat.sol
ABI-encoded Constructor Arguments: leave blank
9) Proceed to Transfer Operations
Once contracts are verified, methods are exposed to NiftyWallet or MEW. You can proceed to either of these tutorials, or view your Kitties in BlockScout.
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Deploy CryptoKitty Contracts
View Cats in BlockScout
Last updated 1 year ago