Register the Chromia bridge on EVM

To enable transfers between networks, we need to register the Chromia bridge component on the EVM bridge contract so that the EVM side recognizes it.

Prerequisites

Before proceeding, ensure you have the following:

• Deployment or leasing of the Chromia bridge component completed.

• Chromia CLI

• Node.js

• MetaMask or a compatible wallet.

• Postchain EIF contracts repository

• The <BRIDGE_DEMO_BRID> for the Chromia bridge component.

  • If you deployed the bridge, this is the BRID assigned during deployment.
  • If you leased a bridge, this should be provided to you.

Set the Bridge Chain RID on the EVM bridge contract

Now that we have the Bridge Chain, we need to configure the EVM bridge contract to recognize this blockchain.

First, ensure you are inside the postchain-eif-contracts directory:

cd postchain-eif/postchain-eif-contracts

Next, run the following command to link the Bridge Chain to the bridge contract:

npx hardhat setBlockchainRid:bridge --network bsc_testnet --address 0x<YOUR_BRIDGE_EVM_ADDRESS> --blockchain-rid 0x<BRIDGE_DEMO_BRID>

Run the following command to link the Bridge Chain to the bridge contract (include --managed-validator 0x<YOUR_BRIDGE_VALIDATOR_ADDRESS> if using a managed validator):

npx hardhat setBlockchainRid:bridge --network bsc_testnet --address 0x<YOUR_BRIDGE_EVM_ADDRESS> --blockchain-rid 0x<BRIDGE_DEMO_BRID> --managed-validator 0x<YOUR_BRIDGE_VALIDATOR_ADDRESS>

info

Remember to add the 0x prefix when entering <BRIDGE_DEMO_BRID> to ensure the EVM contract accepts it.

--blockchain-rid 0x....................

This command updates the EVM bridge contract so it recognizes <BRIDGE_DEMO_BRID>.