Wormhole is one of the largest cross-chain messaging and token bridge protocols in crypto, connecting over 30 blockchains including Ethereum, Solana, Avalanche, BNB Chain, Polygon, Sui, Aptos, and more. Originally launched as a simple Solana-Ethereum bridge in 2020, Wormhole evolved into a general-purpose cross-chain messaging protocol — enabling not just token transfers but arbitrary message passing between chains, allowing smart contracts on one chain to trigger actions on another. Wormhole uses a network of ‘Guardian’ validators (currently 19 entities including Jump Crypto, Everstake, and others) to observe and attest to cross-chain messages. This multi-sig design is faster and more capital-efficient than optimistic approaches but requires trusting the Guardian set. Wormhole gained notoriety from a major February 2022 hack: a vulnerability in its Solana-Ethereum bridge allowed a hacker to mint 120,000 wETH ($325 million) without backing — one of the largest DeFi hacks ever. Jump Crypto, Wormhole’s primary backer, immediately replaced the stolen funds. W is the native token, airdropped in 2024 to users who had bridged assets across Wormhole. Wormhole’s NTT (Native Token Transfers) framework, like LayerZero’s OFT, enables cross-chain token deployments without wrapped assets.
Example: A Solana-native protocol wants to expand to Ethereum but holds its treasury in SOL. They use Wormhole to bridge USDC from their Solana multisig to an Ethereum multisig — the bridge locks USDC on Solana and mints Wormhole-wrapped USDC on Ethereum. The $325M 2022 hack showed the systemic risk: all locked assets are at risk if the bridge smart contract has a bug. Wormhole’s recovery by Jump demonstrated the value of well-capitalised backers in bridge security.
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