Interoperability Stack

Definition

The layered set of protocols that connect blockchains, with generalized messaging at the base, asset and application bridges above it, and intent-based and proof-based systems at the top.

In depth

At the base sit generalized messaging protocols, such as LayerZero, Chainlink CCIP and IBC, which move arbitrary data between chains under their own verification models. Asset-specific systems, such as Circle's Cross-Chain Transfer Protocol, and application bridges build on messaging to move particular tokens or serve particular apps. Toward the top, intent-based bridges let solvers compete to deliver outcomes, and zero-knowledge bridges push verification toward cryptographic proofs. Wallets, aggregators and chain abstraction tools then hide these layers from users by choosing routes automatically. Each layer inherits the trust assumptions of the layers beneath it, so the security of a transfer depends on every component along its route.

What does Interoperability Stack mean?

When a user asks a wallet to move tokens to another chain, an aggregator compares the available routes by price, speed and supported assets. It might select an intent-based bridge, whose relayer fills the order and later settles through a messaging protocol. It might instead select an asset-specific route that burns and mints the token, with a verification service attesting the burn. In either case, a lower layer carries the message between chains, and a destination contract verifies it before releasing funds. The user sees one transaction while several layers do the work.

An example

Someone uses a wallet's swap screen to turn 500 USDC on one chain into ETH on another. The wallet's aggregator picks a route in which an intent-based bridge delivers USDC on the destination chain within seconds for a $2 fee, and a decentralized exchange there swaps it for ETH. Behind the scenes, the relayer's repayment travels over a messaging protocol, and the user sees a single confirmation.

Figures are illustrative only.

What beginners get wrong

• Many people think the brand name on a bridge tells them everything about its security. A route can pass through several layers, each with its own contracts, operators and trust model.
• It is easy to assume that the route does not matter because a wallet hides it. The layers chosen affect fees, speed, which token version arrives, and what could go wrong.
• Some users treat the stack as a fixed industry standard. It is a descriptive model, and many projects span several layers or fit them only loosely.