Digital Wallet System Design | Bank Account | SAGA pattern
4 different implementations of distributed transactions for wallet System Design
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Digital wallets sit at the heart of modern payments, powering apps like Venmo, Cash App, and PayPal. At their core, wallets must do something deceptively simple: debit one account, credit another, and ensure balances are always correct.
Today, we’re going to design Digital Wallet and cover the following components:
Transactions in a Single Database (Small Scale)
Distributed Transactions with a Sharded Database
Distributed Transactions with a Saga Pattern
Event Sourcing Approach
