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Hop Protocol

Hop Protocol lets users transfer tokens between Ethereum and its Layer 2 networks quickly and at low cost.
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Hop Protocol


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Description

Hop Protocol is a rollup-to-rollup token bridge that transfers assets between Ethereum and Layer 2 networks through hToken intermediary tokens and per-chain AMMs. Bonders lock collateral to front liquidity at destination chains, issuing hTokens that users swap for native tokens, with collateral released after a 24-hour on-chain challenge window. The protocol includes a dedicated transfer explorer and a protocol metrics dashboard.

Category: Bridge
TVL: $3.3M

Chains:
ArbitrumArbitrum NovaBaseEthereumOptimismPolygonxDai

Hop SDK


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Description

The Hop JavaScript SDK (@hop-protocol/sdk) provides programmatic access to Hop Protocol bridge functionality, enabling developers to integrate cross-chain token transfers into applications. The SDK handles fee calculation, transaction construction, and AMM interactions across all Hop-supported networks and tokens, with npm distribution and a full API reference.

Category: Developer Tooling

Hop Core Messenger


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Description

Hop Core Messenger is a trustless cross-chain messaging protocol using a hub-and-spoke model where messages are aggregated into bundles whose hashes are relayed between networks via native Ethereum bridges. The architecture targets high-security, non-time-sensitive use cases such as DAO governance and value settlement, and supports collateralized or optimistic messaging layers for time-sensitive applications.

Category: Cross-chain Infrastructure