Proposal: Canton <-> EVM Merkle Attestation Bridge
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- defi-liquidity
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Abstract
This proposal builds the technical foundation for a round-trip Merkle-attestation bridge between Canton and EVM chains, letting Canton-native assets (CIP-56/CIP-112) move to Ethereum and back. We anticipate that the foundation technology will benefit use cases beyond a bridge, wherever external representation of the state of a Canton subnet is desired. At its core is a reusable Merkle ACS Sidecar primitive: any Canton participant can adopt the same commitment scheme for proof-of-reserves, compliance attestation, or other reporting needs, independent of whether they ever bridge an asset. This first proposal delivers the foundation for a round-trip bridge, an open-source Sidecar and contract set, and a demo UI. The proposal also briefly previews additional features that should be considered for a second phase of work before the foundation is used for an operational bridge.
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