Grok;) Try it sometime:
mBridge basics: It’s a permissioned, central bank-controlled DLT platform for wholesale CBDC cross-border payments. Its mBridge Ledger (mBL) is EVM-compatible — it runs Solidity smart contracts — and uses a BFT-style consensus (like Dashing or HotStuff ). It exposes ISO 20022-based APIs for external systems.
XRPL side: The XRPL mainnet isn’t EVM-native, but there’s an official XRPL EVM Sidechain that is fully EVM-compatible and connects to XRPL mainnet mainly through Axelar (for eXRP as gas token and other assets). There are also existing PoC bridges like multi-sig lock/mint setups between XRPL and EVM chains.
High-level architecture for a bidirectional bridge
1. EVM as the intermediary layer — Deploy smart contracts on a public EVM chain (or the XRPL EVM Sidechain) that can talk to both sides.
2. mBridge → EVM direction:
• Use mBridge’s APIs to listen for events or trigger actions on its ledger (e.g., when a CBDC payment or token is issued/redeemed).
• An oracle or trusted relayer (likely needing approval from participating central banks) watches mBridge and calls contracts on the EVM side to mint wrapped representations of the CBDC or payment confirmation.
3. EVM/XRPL → mBridge direction:
• Lock or burn assets on the EVM side (or on XRPL via the EVM sidechain bridge).
• A trusted bridge component or authorized participant calls mBridge’s APIs/smart contracts to issue or transfer the corresponding CBDC on the permissioned ledger.
Realistically, this isn’t a standard public permissionless bridge. mBridge is a closed, regulated system run by central banks — you can’t just spin up a validator or permissionlessly read/write to it. Any bridge would need:
• Explicit participation or API access granted by the central banks involved.
• Heavy compliance, KYC/AML layers, and legal agreements.
• Likely a trusted or consortium model rather than fully decentralized (oracles/relayers controlled by approved parties).
Existing patterns you could adapt:
• Similar to how some experiments have bridged public Ethereum to CBDC testnets using oracles and APIs.
• Leverage the XRPL EVM Sidechain’s existing Axelar or Wormhole integrations as your public EVM gateway, then build a custom adapter to mBridge’s APIs.
• Look at open-source CBDC interoperability proofs-of-concept that use event listening API calls.