# Omni-chain addresses

Gemforge uses CREATE3 keyless deployment under the hood to deploy the Diamond proxy contract.

This makes it possible to deploy the Diamond proxy to the same address on every chain, as long as you are using the same wallet and CREATE3 salt to deploy each target.

As an example, let's say we are deploying to two targets - mainnet and base. The target configurations will look something like:

// gemforge.config.cjs

const WALLET = 'wallet1'
const SALT =
"0xf8aac9c60a8577e3e439a5639f65f9eca367e2c6de7086f4b4076c0a895d1902";

module.exports = {
  ...
  wallets: {
    [WALLET]: {...}
  },
  ...
  targets: {
    mainnet: {
      // Ethereum Mainnet chain
      network: 'mainnet', 
      wallet: WALLET,
      initArgs: []
      create3Salt: SALT,
    },
    base: {
      // BASE chain
      network: 'base', 
      wallet: WALLET, // same wallet
      initArgs: [],
      create3Salt: SALT, // same salt
    }
  }
  ...
}

If we do fresh deployments to both of these targets the Diamond proxy should have the same contract address on both, regardless of the difference in wallet1's activity on each chain.

If you attempt to do a fresh deployment on a chain which already has a deployment using the same wallet and salt then Gemforge will complain that the address is already in use and that you should change the salt value.

# CREATE3 factory

Gemforge uses the CREATE3 factory from the SKYBIT-Keyless-Deployment repository.

Here are the details:

The deployed address of the factory on every chain: 0x24fCFA23F3b22c15070480766E3fE2fad3E813EA
The deploying wallet's public key: 0xc7c0A9dc9c997438eE834bb155dF2AF7fDAe6073
Deployment gas limit: 350,000
Deployment gas price: 100 gwei (= 100000000000 wei or 0.0000001 eth)
Funds required to deploy: 0.035 eth (= gas limit * gas price)

You can deploy the factory yourself on a new chain please ensure there are enough funds in the deploying wallet and then send the following raw signed transaction to the chain:

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

The ABI of the deployed factory is:

/** Deploy a contract using the given salt value, with msg.sender as the deployer. */
function deploy(bytes32 salt, bytes memory creationCode) external payable returns (address deployed);
/** Calcualate the address at which the following deployer wallet and salt value would deploy a contract. */
function getDeployed(address deployer, bytes32 salt) external view returns (address deployed);