2. Configure and Set Up

1. Prepare Addresses

• Prepare 3 BTC + 1 EVM addresses to process transactions:

Address Type	Main Address (BTC)	Pegin Address (BTC)	Pegout Address (BTC)	Ethereum Address
Purpose	Operator staking address on Bitcoin chain Split and send UTXO to Pegin & Pegout addresses	The address responsible for processing deposit transactions	The address responsible for processing withdraw transactions	Operator staking address on the EVM chain.
.env file configuration	BITVM_BRIDGE_OPERATOR_AUTH_SK	BITVM_BRIDGE_OPERATOR_PEGIN_SK	BITVM_BRIDGE_OPERATOR_PEGOUT_SK	BITVM_BRIDGE_OPERATOR_ETH_SK

Please use p2tr type addresses for BTC addresses

• Note: These private keys are essential for the Operator to function correctly and should not be the same.

• You can obtain FIABTC through deposits on the bridge: [https://app.fiammalabs.io/bridge]

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1. Configure Environment Variables

• Edit the `.env` file and set the following important keys:

vim .env

Update these four required private keys:

BITVM_BRIDGE_OPERATOR_AUTH_SK=your_auth_private_key
BITVM_BRIDGE_OPERATOR_PEGIN_SK=your_pegin_private_key
BITVM_BRIDGE_OPERATOR_PEGOUT_SK=your_pegout_private_key
BITVM_BRIDGE_OPERATOR_ETH_SK=0xYourEvmPrivateKey

These private keys are essential for the Operator to function correctly and should not be the same.

Enhance Security (Optional)

For better security, use GPG-encrypted private keys. See the [GPG encryption setup] in the operator-release repository for details.