Exchange funds are secure
Hardware wallet integration solution
Project Background and Challenges
The client is an exchange platform that requires a dedicated fund wallet system to manage user assets. It requires a three-layer structure of hot, cold, and warm: hot wallets for daily deposits and withdrawals, warm wallets for buffering, and cold wallets for large reserves.
The challenge lies in automated fund flow between the three layers—when the hot wallet balance is insufficient, it automatically replenishes from the warm wallet; the warm wallet collects it to the cold wallet, which must go through the signing and approval process. The entire chain's amount thresholds, approval rules, and exception handling must be clear and controllable.
The scope we undertake
Three-layer wallet architecture with hot, cold, and hot, deposit and withdrawal systems, automatic aggregation strategies, sign-batch flow engine, risk monitoring and alerts.
Technology stack




Key technical decisions
Delivery Success (Desensitization)
Teams and cycles
The total cycle is about 15 days, involving 4 people, and progressing in four phases:
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