FBTC Minter

The FBTCMinter contract is a critical component in the FBTC protocol that manages the confirmation of minting, burning, and cross-chain requests. It operates under a role-based access control system to ensure secure and efficient processing of these operations.

Key Features

Role-Based Access Control

Utilizes specific roles for minting, burning, and cross-chain operations to ensure only authorized entities can perform these actions.

• MINT_ROLE: Responsible for confirming minting requests.

• BURN_ROLE: Responsible for confirming burning requests.

• CROSSCHAIN_ROLE: Responsible for confirming cross-chain requests.

Bridge Integration

The FBTCMinter interacts with the FireBridge contract to execute its functions, ensuring seamless integration within the FBTC ecosystem.

High-level Workflow

The FBTCMinter contract works closely with the FireBridge contract to ensure secure and efficient confirmation of minting, burning, and cross-chain requests. Below is a detailed workflow for each operation:

Minting Workflow

1. Minting Request Initiation:

   • A qualified user initiates a minting request via the FireBridge contract.

   • The FireBridge contract validates the request and records it.

2. Confirmation by FBTCMinter:

   • An entity with the MINT_ROLE calls the confirmMintRequest function on the FBTCMinter contract.

   • FBTCMinter forwards the confirmation to the FireBridge contract by calling its confirmMintRequest function.

   • The FireBridge contract processes the request and mints the appropriate amount of FBTC tokens.

Burning Workflow

1. Burning Request Initiation:

   • A qualified user initiates a burning request via the FireBridge contract.

   • The FireBridge contract validates the request and records it.

2. Confirmation by FBTCMinter:

   • An entity with the BURN_ROLE calls the confirmBurnRequest function on the FBTCMinter contract, providing the request hash, withdrawal transaction ID, and output index.

   • FBTCMinter forwards the confirmation to the FireBridge contract by calling its confirmBurnRequest function.

   • The FireBridge contract processes the request and burns the appropriate amount of FBTC tokens.

Cross-Chain Workflow

1. Cross-Chain Request Initiation:

   • A qualified user initiates a cross-chain request via the FireBridge contract.

   • The FireBridge contract validates the request and records it.

2. Confirmation by FBTCMinter:

   • An entity with the CROSSCHAIN_ROLE calls the confirmCrosschainRequest function on the FBTCMinter contract, providing the request details.

   • FBTCMinter forwards the confirmation to the FireBridge contract by calling its confirmCrosschainRequest function.

   • The FireBridge contract processes the request and initiates the cross-chain transfer.

Batch Confirmation Workflow

1. Batch Cross-Chain Request Initiation:

   • Multiple cross-chain requests are initiated and recorded by the FireBridge contract.

2. Batch Confirmation by FBTCMinter:

   • An entity with the CROSSCHAIN_ROLE calls the batchConfirmCrosschainRequest function on the FBTCMinter contract, providing an array of requests.

   • FBTCMinter iterates through the array and forwards each request confirmation to the FireBridge contract.

   • The FireBridge contract processes each request and initiates the respective cross-chain transfers.