Architecture
The vision of Fiamma Bridge is to build the most secure bridge, enabling BTC users to thrive across every corner of the blockchain world. We aim to achieve this vision through a sufficiently decentralized design, as illustrated in the architecture diagram below.
Bitcoin Model
BTC Asset Management
The user's BTC is transferred to a multi-signature Taproot address, where the signers are the user and the bridge committee.
BitVM2 Transactions
Pre-signed transactions that define how the user's BTC can be spent (e.g., for withdrawals or penalties).
Destination chain Set (illustratory)
EVM-compatible chains: Ethereum, BSC, Pharos, Base, Arbitrum, etc.
SVM (Solana Virtual Machine): Solana
Move VM chains: Sui, Aptos, etc.
Wasm VM: Babylon
Challenger Group
A permissionless group responsible for detecting malicious operators.
Committee Group
A permissioned group that secures the bridge during pre-signing phases. Its roles include:
Participating in pre-signing BitVM2 transactions.
Distributing rewards to challengers.
Operator Group
Currently permissioned, but will transition to permissionless in the future.
Facilitates user withdrawals from any sidechain.
Fast Processor (FP) Group
Currently permissioned, but will become permissionless in the future.
Handles withdrawal requests that cannot be processed directly by the Operator (e.g., partial withdrawals or complex cases).
Front-end Model
Website: Users can access the Fiamma bridge via the web interface.
App: Users can access the Fiamma bridge through the Fiamma mobile/desktop app.
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