Contents

Chapter 1

Features

This chapter covers the core features and capabilities of Payment Retry Logic.

Features

  • 20+ error codes classified into 7 failure categories
  • Exponential backoff with configurable jitter
  • Category-aware retry strategies (network vs. decline vs. fraud)
  • Retry task queue with scheduling and execution tracking
  • Recovery rate analytics and statistics
  • Hard decline detection (never retry stolen/expired cards)
  • Human-readable delay formatting
  • Full backoff schedule visualization
  • Python stdlib only — zero dependencies

Quick Start

bash
# Run the full demo
python src/payment_retry_logic.py --action demo

# Classify an error code
python src/payment_retry_logic.py --action classify --error-code insufficient_funds

# Schedule a retry
python src/payment_retry_logic.py --action schedule --payment-id pay_001 --error-code network_error

# View backoff tables
python src/payment_retry_logic.py --action backoff-table

# Process pending retries
python src/payment_retry_logic.py --action process-queue
Chapter 2

CLI Reference

Follow this guide to get Payment Retry Logic up and running in your environment.

CLI Reference

FlagDescription
--action, -aAction to perform (required)
--error-codePayment error code to classify
--payment-idPayment ID for retry scheduling
--task-idRetry task ID for execution
--amountPayment amount in cents
--simulate-successSimulate a successful retry
--data-dirData storage directory (default: ./retry_data)
--verbose, -vEnable debug logging

Error Categories

CategoryRetryableStrategy
soft_declineYesRetry after 1-24 hours
hard_declineNoAsk customer to update payment
network_errorYesRetry in 1-15 minutes
fraudNoNever retry
processing_errorYesRetry in 15-60 minutes
authenticationNoRedirect customer to 3DS
rate_limitYesExponential backoff from 2 min
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