Chain Fusion
ckSOL Explained: Native Solana Integration on Internet Computer Without Bridges
Following the groundbreaking success of ckBTC and ckETH, ckSOL brings native Solana interoperability to the Internet Computer. By leveraging threshold Ed25519 cryptography and direct RPC integration, ICP canisters can hold, sign, and settle Solana transactions without centralized custodian bridges.
1. Why Cross-Chain Bridges Failed
Over $3.5 billion has been stolen in cross-chain bridge hacks (Wormhole, Nomad, Ronin). Traditional bridges rely on multi-sig relayer sets or smart contract vaults on foreign chains that present massive attack vectors.
2. The Chain-Key Cryptography Alternative
With Chain Fusion, the Internet Computer subnet functions as a distributed signer:
- Threshold Ed25519: The Solana private key is secret-shared across all nodes in the subnet. No single node ever sees the full key.
- Direct On-Chain Custody: When you deposit SOL to a canister-generated Solana address, the canister verifies the deposit and mints ckSOL 1:1 on ICP.
- Instant Low-Cost Transfers: Sending ckSOL on ICP takes 1–2 seconds with a fixed fee of just 0.0001 ckSOL.
