Building a Secure and Automated Stablecoin Top-Up Channel

Client Overview

The client is an online video game platform serving consumer users worldwide, offering services such as online games, virtual items, memberships, and live-stream tipping. As the number of crypto-native users continued to grow, the platform sought to support direct stablecoin top-ups while minimizing additional technical and risk management complexity.

Business Challenges

• Lack of stablecoin payment support: Many users already hold stablecoins such as USDT and USDC, but the platform’s existing payment methods were limited to traditional cards and e-wallets, leaving this demand unmet.

• In-house wallet and risk infrastructure complexity: Building proprietary wallet systems would require the platform to manage private keys, on-chain monitoring, risk controls, and reconciliation internally. Any design or operational shortcomings could introduce significant security and compliance risks.

• Complex top-up and settlement workflows: User top-ups, fund aggregation, and downstream settlement to guilds, publishers, and content creators involve multiple steps. Manual or semi-automated processes are error-prone, inefficient, and costly in on-chain environments.

The platform required a mature infrastructure solution that could quickly enable stablecoin top-ups and settlement, while remaining secure and highly automated.

Cobo’s Solution

• User-level wallet addresses, with stablecoin top-ups integrated as a native feature: Through Cobo’s Payments API, the platform automatically generates a dedicated top-up address for each user in the backend, with a one-to-one mapping between wallet address and platform account. On the frontend, the platform simply displays the corresponding address or QR code on the top-up page. Users can transfer stablecoins directly, without the platform needing to build address pools or manage private keys.

• Automated detection and crediting of top-ups, with no manual intervention: Cobo continuously monitors on-chain activity for these addresses. Once a user’s transfer is detected and confirmed, a webhook callback notifies the platform with structured information including user ID, amount, asset type, and transaction hash. Based on this data, the platform automatically credits the user account and delivers virtual items or membership benefits, eliminating the need for manual reconciliation.

• Stablecoin fund aggregation and payout settlement to partners: Stablecoins received from user top-ups are securely custodied within Cobo’s wallet infrastructure. After the platform completes internal revenue accounting and revenue-sharing calculations, it initiates batch payout instructions via Cobo’s Payments API. Cobo executes payments to guilds, publishers, content creators, and other partners according to predefined amounts. Using merchant management capabilities, the platform can configure distinct fee rates and settlement rules for different business lines or partners, with fees calculated and reports generated automatically.

Results and Impact

• Enhanced security posture: Private key management and on-chain operations are fully handled and audited by Cobo under institutional-grade standards. Clear internal permission boundaries reduce operational risk stemming from human error or personnel changes.

• Reduced manual operations: From address generation and on-chain monitoring to top-up crediting, batch partner payouts, and fee settlement, core workflows are automated through Cobo’s Payments API. Operations and engineering teams no longer need to spend time on manual reconciliation or transaction handling.

• Enhanced cost control: Through bundled fee pricing, Cobo’s Payments API converts unpredictable gas fees into a single fixed cost. This effectively avoids gas fee accumulation in small, high-frequency top-up scenarios, delivering approximately 50% optimization in on-chain payment and settlement costs.

Smoother user and partner experience: Users can complete stablecoin top-ups reliably, with higher payment success rates. Partners receive payouts on predictable schedules, while the platform gains clear visibility into fund inflows and outflows within a single system, simplifying overall fund management.