Building payment systems for African markets comes with challenges that most tutorials ignore. How to split a single transaction across multiple sellers, credit wallets in real time, and handle the inevitable failed or delayed webhook from Paystack. This poster walks through the architecture of BookLoop, a second-hand book marketplace built for the Nigerian market, as a case study for multi-vendor payment infrastructure in Python. Using Paystack as the payment provider, we explore how a single buyer payment triggers a chain of backend logic: fee deduction, seller wallet crediting, and withdrawal processing. Python code snippets illustrate each step from webhook verification to wallet balance updates giving attendees a practical blueprint they can adapt for their own platforms. Whether you're building a marketplace, a fintech product, or any application where money moves between multiple parties, this poster gives you the mental model and the code patterns to get it right.

Building payment systems for African markets comes with challenges that most tutorials ignore. How to split a single transaction across multiple sellers, credit wallets in real time, and handle the inevitable failed or delayed webhook from Paystack. This poster walks through the architecture of BookLoop, a second-hand book marketplace built for the Nigerian market, as a case study for multi-vendor payment infrastructure in Python. Using Paystack as the payment provider, we explore how a single buyer payment triggers a chain of backend logic: fee deduction, seller wallet crediting, and withdrawal processing. Python code snippets illustrate each step from webhook verification to wallet balance updates giving attendees a practical blueprint they can adapt for their own platforms. Whether you're building a marketplace, a fintech product, or any application where money moves between multiple parties, this poster gives you the mental model and the code patterns to get it right.

Building payment systems for African markets comes with challenges that most tutorials ignore. How to split a single transaction across multiple sellers, credit wallets in real time, and handle the inevitable failed or delayed webhook from Paystack. This poster walks through the architecture of BookLoop, a second-hand book marketplace built for the Nigerian market, as a case study for multi-vendor payment infrastructure in Python. Using Paystack as the payment provider, we explore how a single buyer payment triggers a chain of backend logic: fee deduction, seller wallet crediting, and withdrawal processing. Python code snippets illustrate each step from webhook verification to wallet balance updates giving attendees a practical blueprint they can adapt for their own platforms. Whether you're building a marketplace, a fintech product, or any application where money moves between multiple parties, this poster gives you the mental model and the code patterns to get it right.

Building payment systems for African markets comes with challenges that most tutorials ignore. How to split a single transaction across multiple sellers, credit wallets in real time, and handle the inevitable failed or delayed webhook from Paystack. This poster walks through the architecture of BookLoop, a second-hand book marketplace built for the Nigerian market, as a case study for multi-vendor payment infrastructure in Python. Using Paystack as the payment provider, we explore how a single buyer payment triggers a chain of backend logic: fee deduction, seller wallet crediting, and withdrawal processing. Python code snippets illustrate each step from webhook verification to wallet balance updates giving attendees a practical blueprint they can adapt for their own platforms. Whether you're building a marketplace, a fintech product, or any application where money moves between multiple parties, this poster gives you the mental model and the code patterns to get it right.

Building payment systems for African markets comes with challenges that most tutorials ignore. How to split a single transaction across multiple sellers, credit wallets in real time, and handle the inevitable failed or delayed webhook from Paystack. This poster walks through the architecture of BookLoop, a second-hand book marketplace built for the Nigerian market, as a case study for multi-vendor payment infrastructure in Python. Using Paystack as the payment provider, we explore how a single buyer payment triggers a chain of backend logic: fee deduction, seller wallet crediting, and withdrawal processing. Python code snippets illustrate each step from webhook verification to wallet balance updates giving attendees a practical blueprint they can adapt for their own platforms. Whether you're building a marketplace, a fintech product, or any application where money moves between multiple parties, this poster gives you the mental model and the code patterns to get it right.

Building payment systems for African markets comes with challenges that most tutorials ignore. How to split a single transaction across multiple sellers, credit wallets in real time, and handle the inevitable failed or delayed webhook from Paystack. This poster walks through the architecture of BookLoop, a second-hand book marketplace built for the Nigerian market, as a case study for multi-vendor payment infrastructure in Python. Using Paystack as the payment provider, we explore how a single buyer payment triggers a chain of backend logic: fee deduction, seller wallet crediting, and withdrawal processing. Python code snippets illustrate each step from webhook verification to wallet balance updates giving attendees a practical blueprint they can adapt for their own platforms. Whether you're building a marketplace, a fintech product, or any application where money moves between multiple parties, this poster gives you the mental model and the code patterns to get it right.