Invoice Chaser uses memory of client payment habits to time freelancer reminders

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Invoice Chaser is an invoice tracker for freelancers paid in USDC on Sui, built for the Total Recall hackathon with Tatum and Walrus Memory. Each invoice gets a unique micro-decimal amount that serves as an on-chain fingerprint, and clients pay through a Sui payment link, with the app verifying payments on Sui Mainnet via Tatum's gRPC gateway. Every event, such as reminders sent and payment delays, is stored as a memory in Walrus Memory, which the app recalls before choosing the timing and tone of the next reminder. The developer reports that its payment predictions became more accurate over successive invoices, with the error falling from 4 days to 0 days across four payments from one client. Users can also add rules manually or extract them from client emails, and a Why panel explains each scheduling decision.

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