SplitHub: Tap-to-Pay Crypto Splitting With an NFC Chip

A payments app where friends split bills, merchants take payment, and people tap an NFC chip to pay in person, with a DeFi agent managing idle funds in the background.

@george

github.com/0xgeorgemathew/splithubvisit ↗

code

process.log7 fields

toolsClaude Opus 4.6Claude Code

iterationsMany attempts

317 commits, including repeated fixes to onchain validation and error handling

time18

%_ai40

me 60

ai 40

self-reported · generously rounded

# how_it_was_made

SplitHub is for splitting bills with friends and paying merchants without a wallet-app maze. I set the core idea: the chip authorizes a payment but never holds funds, so the money keeps earning yield until a real payment needs it. Claude Code wrote most of the code, including the onchain validation, the store logic and the agent that manages liquidity. I decided how the flows should behave and steered the fixes when a payment failed.

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