Checkout by LINK
checkout with any, settle in one
Created on 25th April 2025
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Checkout by LINK
checkout with any, settle in one
The problem Checkout by LINK solves
Today, global merchants—especially in emerging and frontier markets—struggle with accepting cross-border payments in a way that’s fast, cost-effective, and FX-native costing over $1.7–$2.5 trillion annually. Stablecoin payments exist, but they’re fragmented, USD-dominant, and lack merchant-ready settlement flows in local currencies like GBP, NGN, ZAR, or EUR.
Checkout by LINK fixes this by turning any stablecoin payment into an onchain, real-time FX conversion—settling directly into a merchant’s preferred local stablecoin (e.g., USDC → ZARP) and automatic payment method. This eliminates the need for off-chain PSPs that add markups, reduces FX costs, and settles instantly.
Compared to existing solutions that are either crypto-native (but not business-friendly) or TradFi-heavy (but slow and expensive), Checkout by LINK brings the best of both: programmable stablecoin payments + FX-native settlement.
A successful tx between USD/ZAR on Checkout by LINK: https://basescan.org/tx/0x27c497116e58c550306b4c27e739cedaec85ab22041298c025f56dd43fa581a2
Contract Deployed: https://basescan.org/address/0x1fb93c553ac2b3b79fbafd9da04290b3339aeaef#code
Challenges we ran into
Problem: Connecting a Base smart contract directly into the frontend checkout flow required syncing wallet state, confirmations, and user feedback.
Solution: We abstracted the contract calls behind a simple API layer to improve user experience while transacting.
Problem: Some deposits didn’t reflect instantly due to missed webhooks or network delays.
Solution: We added retry logic and a manual refresh trigger using socket.io so the system could catch up gracefully without blocking users.
Tracks Applied (3)
Stablecoins
Consumer
Showcase
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