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Smart Contract Development with Remix IDE

Compiler version

You need to use Solidity compiler version at least 0.8.7+. You can change this within the IDE’s Solidity compiler section:

  • Change the COMPILER to the value 0.8.7+commit.e28d00a7.
  • Change the EVM VERSION to the value london.
  • If you received a warning redarding the contract code size then check the Enable optimization checkbox and set the next field to 200 or greater.

Remember the values set here for smart contract verification on the PulseScan later.

Configure Remix for Testnet

Open the Deploy & run transactions section in the left navigation bar. Then select the ENVIRONMENT to Injected Web 3. If you are connected PulseChain Testnet via the MetaMask wallet, then the text Custom (942) network should be visible in the drop down. Also in the ACCOUNT dropdown you should see address of the account from the MetaMask.

Deploy to PulseChain

If you have your contract compiled, open the Deploy & run transactions section in the left navigation bar.

Before your start make sure you have tPLS or PLS for gas available on your account specified by the ACCOUNT.

Contract verification

You need Flattener plugin for contract verification. Open the IDE’s Plugin manager section (2nd bottom button on the left navigation bar) and search for the plugin and activate it by clicking the Activate button.
When you have this plugin activated, a new section icon should appear on the left navigation bar - open this section.

Click the Flatten ....sol button and then click the Save ....sol button - this will copy the flattened version of the Solidity source code to the clipboard.

Proceed with the steps below only if PulseScan already indexed your smart contract and you can see the Code tab.

Now open PulseScan wizard for contract validation in browser by navigating to https://scan.v3.testnet.pulsechain.com/address/0xDEPLOYED_CONTRACT_ADDRESSADDRESS/contract_verifications/new .

In the first step of the wizard:

  • Ensure that the Contract Address is set to the deployment address of your contract.
  • Radio button Via flattened source code is selected (should be selected by default).

Now click the Next button. In the second step of the wizard:

  • Fill in the Contract Name field.
  • Select Include nightly builds to no.
  • Set the Compiler to the same version as the value set in the Remix IDE.
  • Set the EVM Version to the same version as the value set in the Remix IDE.
  • Tick Optimization according to your setting in Remix IDEi and fill in the Optimization runs as set there.
  • Paste the flattened contract code into the field Enter the Solidity Contract Code. Make sure you also include your SPDX License Identifier line.

Now click the Verify & publish button, it should change its label to Loading.

The verification process can take a lot of time. Meanwhile, the Loading button may not change. While waiting for verification you can also check manually the Code tab on PulseScan, if the contract is shown as verified there, you can close the browser.

You can open the Code tab on PulseScan by navigating to https://scan.v3.testnet.pulsechain.com/address/0xDEPLOYED_CONTRACT_ADDRESSADDRESS/contracts .

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