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Foundations: Interoperability

What is an Interoperability Protocol?An interoperability protocol is the machinery that lets one blockchain cause a trustworthy effect on another

What is an Interoperability Protocol?An interoperability protocol is the machinery that lets one blockchain cause a trustworthy effect on another. The hard part is not moving data but proving, under clear trust assumptions, that the data really came from the source chain and should be acted on.Mar 21, 202625 min read

#INTEROPERABILITY

What Is a Light Client Bridge?A light client bridge tries to answer the hardest question in interoperability without trusting a custodian: how can one chain know what really happened on another? It does this by running a compact verifier of the source chain on the destination chain, so cross-chain actions are accepted only when they can be proved against source-chain consensus

What Is a Light Client Bridge?A light client bridge tries to answer the hardest question in interoperability without trusting a custodian: how can one chain know what really happened on another? It does this by running a compact verifier of the source chain on the destination chain, so cross-chain actions are accepted only when they can be proved against source-chain consensus.Mar 21, 202626 min read

What Is Cross-Chain Interoperability?Cross-chain interoperability matters because blockchains are powerful but isolated

What Is Cross-Chain Interoperability?Cross-chain interoperability matters because blockchains are powerful but isolated. The hard part is not just sending a message from one chain to another — it is doing so without breaking the security assumptions that gave each chain value in the first place.Mar 21, 202626 min read

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What is a Bridged Asset?A bridged asset is a token on one blockchain that stands in for an asset that really originates on another

What is a Bridged Asset?A bridged asset is a token on one blockchain that stands in for an asset that really originates on another. That sounds simple, but the important question is not what the token is called — it is what guarantees that the token is actually backed, redeemable, and still valid if something goes wrong.Mar 21, 202623 min read

What is a Canonical Bridge?A canonical bridge is the asset pathway a chain treats as official

What is a Canonical Bridge?A canonical bridge is the asset pathway a chain treats as official. That sounds like a branding detail, but it changes the trust model: users are not just relying on a bridge operator, they are relying on the chain’s own protocol, contracts, and withdrawal rules.Mar 21, 202625 min read

What is Bridge Relay?A bridge relay is the off-chain agent that makes cross-chain communication actually move

What is Bridge Relay?A bridge relay is the off-chain agent that makes cross-chain communication actually move. Chains may be able to verify foreign state, but without someone watching one chain, packaging the right proof or attestation, and submitting it to another, the bridge does not live.Mar 21, 202626 min read

What is Bridge Risk?Bridge risk is the price of making separate blockchains behave like one system

What is Bridge Risk?Bridge risk is the price of making separate blockchains behave like one system. Whenever a bridge moves assets or messages across chains, it must answer a hard question: who is trusted to decide that something really happened on the source chain, and what happens if that answer is wrong?Mar 21, 202627 min read

What is Message Passing?Message passing is the core idea behind modern blockchain interoperability: instead of moving a chain’s state wholesale, one system proves that a specific event happened and another system acts on that fact

What is Message Passing?Message passing is the core idea behind modern blockchain interoperability: instead of moving a chain’s state wholesale, one system proves that a specific event happened and another system acts on that fact. Once that clicks, token bridges, interchain accounts, and cross-chain apps all look like variations of the same mechanism.Mar 21, 202626 min read

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What is a Bridge?A blockchain bridge exists because blockchains do not naturally share state

What is a Bridge?A blockchain bridge exists because blockchains do not naturally share state. To move assets or instructions across chains, a bridge has to answer one hard question: how can chain B trust that something really happened on chain A?Mar 21, 202623 min read