How to Verify Proxy Contract
In this section, we provide a quick guide on how to verify a deployed BEP20 proxy contract.
Flatten your contract​
Install flattener​
npm install truffle-flattener -g
Run the following command:
$ truffle-flattener BEP20TokenImplementation.sol > BEP20TokenImplementationFlattened.sol
$ truffle-flattener BEP20UpgradeableProxy.sol > BEP20UpgradeableProxyFlattened.sol"
Compile and deploy your contract with Remix​
Compile Implementation contract​
- Open Remix IDE: https://remix.ethereum.org
- Select solidity language
- Create new contract
BEP20Token.sol
and copy contract code from flattenedBEP20TokenImplementationFlattened.sol
- Compile the implementation contract
- Click on this button to switch to the compile page
- Select “BEP20TokenImplementation” contract
- Enable “Auto compile” and “optimization”
- Click “ABI” to copy the contract abi and save it.
Deploy the implementation contract​
- Select “Injected Web3”
- Select “BEP20TokenImplementation” contract
- Click the “Deploy” button and Metamask will pop up
- Click the “confirm” button to sign and broadcast the transaction to BSC.
- Then, you need to initialize the token: fill in all the parameters and click on “transact”
Note:
Owner
should be the address who send the deploy transaction before.
- Click on the “Copy” icon to save the initializatioin data: Like the following: ```
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
- Confirm your transaction in MetaMask
Compile Proxy Contract​
- Create new contract proxy.sol and copy contract code from flattened
BEP20UpgradeableProxyFlattened.sol
. Here is and example - Compile the proxy contractClick on this button to switch to the compile page
- Select “BEP20UpgradeableProxy” contract
- Enable “Auto compile” and “optimization”Click “ABI” to copy the contract abi and save it.
Deploy the proxy contract​
- Select “Injected Web3”Select “BEP20UpgradeableProxy.sol” contract
- Fill in the parameters
Logic: The address of BEP20Implementation
contract
Admin: admin cannot be BEP20 token owner
Data: use the initialization data you saved before
- Click the “Deploy” button and Metamask will pop up
- Click the “confirm” button to sign and broadcast transaction to BSC.
Verify Proxy Contract on BscScan​
Note: The way to verify the BEP20TokenImplementation contract is the same as before.
- Go to your contact page and click on “Verify and Publish”
- Select Single file
- Copy your contract code below and check “Optimization” if it’s enabled
- Contractor Data: Please use this site for getting the correct constructor data: https://abi.hashex.org/#
First, you need to copy ABI json of “BEP20UpgradeableProxy.sol” contractThen, click on “Parse”
Add all those 3 parameters as indicated. Then copy/paste the result.
That’s it! You have verified your proxy contract.
Link these two contracts​
- Click on “More Options” and choose “is this a proxy”.
- Verify your proxy address
- Confirm the implementation address.
If you go back to the contract page and you can see two more buttons “Read as Proxy” and “Write as Proxy”