Why Bridge Hacks Keep Happening and How Atomic Swaps Solve It
**Bridges don't actually move your assets** - they lock them in vaults and issue wrapped tokens as IOUs. When you bridge ETH to Solana, your real ETH sits locked while you receive a synthetic token representing a promise to unlock it later.
**This architecture creates a critical vulnerability**: the system must maintain perfect synchronization between locked assets and minted synthetics. Major exploits include:
- Wormhole: $320M lost
- Ronin: $600M lost
- Nomad: $190M lost
**THORChain uses a different approach** with atomic swaps. When swapping ETH for SOL, your Ethereum enters a threshold-signature vault while native Solana from a separate vault goes to your address. No wrapped tokens exist.
**Key differences**:
- Bridge hack → your wrapped tokens become worthless
- Atomic swap → transaction either completes or refunds, no synthetic tokens at risk
**The tradeoff**: Native swaps are slower and more expensive than bridges, but eliminate the failure mode where users discover their wrapped tokens have no backing.
With atomic swaps, you never hold someone else's promise.