Bridge

Overview

Bullet’s bridging infrastructure is built for fast, trust-minimized cross-chain interoperability. Our primary bridge is powered by Hyperlane, supporting deposits from Solana and all other major chains, with Solana deposits finalizing in 15s—far faster than Ethereum rollups. Additionally, Relay will enable near-instant, intent-based bridging, making cross-chain funding seamless.

Unlike traditional rollups that feel like separate ecosystems, Bullet is designed as a seamless extension of Solana, not an isolated Layer 2, where bridging is so fast and frictionless that it barely feels like you bridged at all.

Bridging Architecture

Hyperlane Bridge (Primary)

• Supports deposits from Solana and any other major chain.

• Solana-native deposits finalize in 15s, aligning with Solana’s finality speed.

• Allows direct asset transfers and execution without the need for wrapped tokens.

• Our Hyperlane adapter is built, end-to-end tested and currently in audit.

Relay (Instant Intents-Based Bridging)

• Enables frictionless bridging from major chains via off-chain intents, with settlement within seconds, even from non-Solana chains.

Withdrawals: Optimistic vs. ZK

Optimistic Withdrawals (Launch Phase)

Bullet will initially launch with an optimistic security model, leveraging fraud proofs and crypto-economic incentives to secure the network. Unlike previous optimistic rollups like Optimism and Arbitrum, which rely on interactive fraud proofs that can take up to a week to resolve, Bullet does not require interactive disputes.

Instead, attestations play a central role in Bullet’s security. Validators stake tokens on claims such as "the state at block N is X." If a claim is challenged and proven incorrect, the attester's stake is slashed—half burned and half rewarded to the challenger. This mechanism ensures that light clients can quickly gain confidence in the state, even before full finality is reached.

• Fast Confidence, Delayed Finality – Once an attestation is posted, clients immediately know that either the state is correct or the attester is about to be slashed. If no one challenges the claim, certainty increases over time.

• Finality Period – Initially set to ~24 hours, allowing time for challenges before a state is fully accepted.

• Guaranteed Fraud Proofs – Unlike past optimistic rollups that shipped without fraud proofs, Bullet will have fraud proofs ready shortly after launch.

ZK Withdrawals (Future Upgrade)

While optimistic security is simpler and more efficient, it is ultimately crypto-economic—relying on economic incentives rather than cryptographic certainty. Bullet plans to transition to ZK proofs as proving technology rapidly accelerates, which we believe can get us to sub 15m withdrawal times.

• Security by Math, Not Incentives – Instead of requiring attesters and challenges, validity proofs cryptographically prove the correctness of every state transition.

• Faster Dispute Resolution – Instead of waiting for a predetermined period of time like in optimistic settings, ZK proofs settle disputes in a single proof submission.

• Higher Cost, But Rapidly Improving – While proving today is expensive and can take hours, hardware acceleration and recursive proof techniques are driving costs down rapidly.

Path to a Fully Trust-Minimized Bridge

Unlike traditional rollups relying on multisig-controlled bridges, Bullet is committed to decentralization. Once light client implementations are complete, we will support trust-minimized bridging, ensuring cryptographic security without relying on intermediaries.