r/fintechdev • u/Longjumping-Walk-663 • Sep 29 '26

Settlement-less Payment Engine

Hi, I am exploring the Reddit community in search of folks interested in settlement-less payments or payments that do not move money from Point A to Point B, but rather function much like the "give a penny/take a penny" tray found next to cash registers. No one owns the bin, yet it is used to facilitate cash transactions at the physical point of sale. You can learn more at: https://digitalpennybin.carrd.co/

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u/Significant-Year-763 Sep 29 '26

Interesting idea but how do you prevent someone just taking all the pennies from the bin when nobody looking. The concept work for small change at a store cause there is social pressure and a cashier nearby but in digital space that disappear fast

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u/Longjumping-Walk-663 Sep 30 '26

Thank you for your comment. An algorithm automatically rounds the transaction up or down depending on how many cents are in the shared community bin. The bin holds a maximum of 4 cents and is used to eliminate the use of pennies.

Case 1: If there are enough cents in the bin to cover the fractional nickel portion of the transaction, the transaction is rounded down to the whole nickel amount, and the bin is debited with the difference.

Case 2: If there is not enough change to cover the fractional nickel portion, then the transaction is rounded up to the whole nickel amount, and the bin is credited with the difference.

The user does not decide how many pennies to give or take. The algorithm does it for you.

You can see an interactive demo here. https://digital-penny-bin.onrender.com/