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Dollarchain

Dollarchain

A social coordination game.

Created on 15th May 2025

Dollarchain

Dollarchain

A social coordination game.

The problem Dollarchain solves

Dollarchain explores Sybil resistance through a fun social game.

Properties:

  • Money movement: Small amount w. high velocity

  • Social: Competitive & collaborative

  • Sybil Resistant: Using Farcaster’s social graph, Neynar’s score & paywalls for participation

My goal is delivering fun, & iterating fast w. my learnings.

Challenges I ran into

Where do I start? I'm the dev, designer & customer support.

Development:

  • State Synchronization: Ensure all updates are reflected in UI, database & blockchain. When a user deposits $1, the transaction hash is checked from the Base network & then confirmed in my database, all while giving correct state feedback to the user on the UI side.

I tested extensively, including in production with real USDC. However, in the end, many things still broke. Dollarchain was used by over 500 unique users in 1 day w. 50% of them processing $1 transactions onchain.

Design:

  • Ensuring that the game flow is simple. A user lands on the homepage and instantly knows what to do. There are several game rules, and making sure the users quickly understood them was crucial.

I went through 3 design changes, largely focusing on deleting anything that I felt wasn't necessary. It's a tough exercise to remove rather than add, however, it worked in the end, as hundreds of users were able to easily get started.

Customer Support:

  • I single-handedly had to respond to 200+ messages, gathering feedback, dealing with things breaking, and figuring out core use-cases moving forward.

No special workaround, just one by one reaching out to any cast or comment that mentioned Dollarchain and responding to all inbound messages. I knew Dollarchain had something special, given the volume of "complaints" trying to participate in the game.

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Tracks Applied (1)

Mini-apps

Dollarchain is a mini app that delivers a fun social experience. It's a viral game that happens every Thursday. It laun...Read More

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