Cross-chain · Bridge

Lower the assumption of trust

Cross-chain bridge

PeriodAbout 1.5 months

Business LineCross-chain bridges / multi-chain assets

Core StackMulti-chain contracts / validators / listeners

RegionChina

Project Background and Challenges

Customers already have multi-chain deployments and need reliable cross-chain asset bridges to enable users to transfer assets across chains. The challenge lies in cross-chain bridges, which have always been a hotspot for attacks; any centralized trust is a potential attack surface.

Selection of safety models— Multisig / threshold signature / optimistic verification / ZK each requires trade-offs. Our goal is to minimize trust assumptions within acceptable performance limits.

The scope we undertake

Cross-chain contracts (source chain / target chain), validators / relay nodes, on-chain event listeners, user frontends, emergency circuit breaker mechanisms.

Scope 1

Cross-chain contracts (source chain / target chain)

Scope 2

Validators / Relay nodes

Scope 3

On-chain event listeners

Scope 4

User front-end

Scope 5

Emergency circuit breaker mechanism

Technology stack

Contract

Multi-chain smart contracts (source/target)

Verification

Threshold Signature / Validator Scheme

Relay

On-chain event monitoring and cross-chain message relay

Safety

Circuit breaker mechanism + upper limit control

Key technical decisions

Decision 01

Assume the trust is minimized

Choose threshold signature + decentralized validator solution to avoid single custody and reduce the concentration of targeted funds.

Decision 02

Circuit breakers and upper limits

Set upper limits for single transactions and daily cumulative transactions; abnormal situations trigger immediate circuit breaks, limiting potential losses within a controllable range.

Decision 03

Auditing and stress testing

Multiple rounds of audits and offense-defense drills before launch, leaving no room for trial and error in cross-chain bridges.

Delivery Success (Desensitization)

10+ items

Supported chain count

1 min

Cross-chain confirmation time

Multiple rounds

Third-party audit

Teams and cycles

The total cycle is about 1.5 months, involving 10 people, progressing in four phases:

Safety model design

Contracts and validators

Relay and monitoring

Audit and online service

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