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Copyright (c) A|iens. All rights reserved.

============================================================ Engine/Module : Aliens Wiki — HIEN…

Overview
🌟

Copyright (c) A|iens. All rights reserved. — Quick Facts

📌

#: Entity (Table)

🎯

1: payments

⚡

2: payment_attempts

🔑

3: refunds

Topic 1
📥 📥 🧠 🔬 💡 🎯

Infobox

📚 | Property | Detail | |---|---| | Full Name | Payment Platform Data Model (Database…
Topic 2
💡 📊 🔬

Entity-Relationship Diagram

💡 `mermaid erDiagram MERCHANTS ||--o{ PAYMENTS : "receives" MERCHANTS ||--o{ SETTLEMENTS :…
Topic 3
📥 📥 🧠 🔬 💡 🎯

Core Entity: payments

🎯 payments table platform ki sabse important table hai — har ek payment transaction ka…
Topic 4
⭐

Core Entity: payment_attempts

⭐ Har bar gateway ko payment bheja jaata hai — wo ek attempt hai. Ek payment me multiple…
Topic 5
📥 📥 🧠 🔬 💡 🎯

Core Entity: refunds

🔑 Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | UUID | PK |…
Topic 6
✨

Core Entity: merchants

✨ Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | UUID | PK |…
Topic 7
📥 ⚙️ 🔬 💡

Core Entity: customers

🌟 Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | UUID | PK |…
Topic 8
📥 ⚙️ 🔬 💡

Core Entity: payment_methods

🚀 Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | UUID | PK |…
Topic 9
📥 📥 🧠 🔬 💡 🎯

Core Entity: settlements

📚 Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | UUID | PK |…
Topic 10
📥 ⚙️ 🔬 💡

Core Entity: subscriptions

💡 Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | UUID | PK |…
Topic 11
🔒

Core Entity: disputes

🎯 Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | UUID | PK |…
Topic 12
⭐

Core Entity: webhook_events

⭐ Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | UUID | PK |…
Topic 13
📥 📥 🧠 🔬 💡 🎯

Core Entity: audit_logs

🔑 Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | id | BIGINT | PK,…
Topic 14
📥 ⚙️ 🔬 💡

Core Entity: idempotency_keys

✨ Schema | Column | Type | Constraints | Purpose | |---|---|---|---| | key | VARCHAR(255) |…
Topic 15
📥 ⚙️ 🔬 💡

Relationships Map

🌟 | Relationship | Type | Cardinality | FK Location | |---|---|---|---| | Merchant →…
Topic 16
🚀

Data Types aur Conventions

🚀 | Convention | Rule | Rationale | |---|---|---| | Primary keys | UUID v7 (time-sorted)…
Topic 17
📥 📥 🧠 🔬 💡 🎯

Indexing Strategy

📚 | Strategy | Detail | |---|---| | Merchant-scoped queries | Almost every query…
Topic 18
💡 📊 🔬

Data Integrity Patterns

💡 | # | Pattern | Implementation | Purpose | |---|---|---|---| | 1 | Foreign key…
Topic 19
🔒

Amount aur Currency Handling

🎯 | Rule | Detail | |---|---| | Integer storage | amount_cents: BIGINT. ₹100.50 = 10050.…
Topic 20
⭐

Timestamps aur Timezone

⭐ | Rule | Detail | |---|---| | Always TIMESTAMPTZ | PostgreSQL me TIMESTAMP WITHOUT TIME…
Topic 21
✨

Soft Delete vs Hard Delete

🔑 | Aspect | Soft Delete | Hard Delete | |---|---|---| | Implementation | deleted_at…
Topic 22
📥 ⚙️ 🔬 💡

Versioning aur Optimistic Locking

✨ How It Works | Step | Detail | |---|---| | 1 | Read payment: SELECT * FROM payments WHERE…
Topic 23
🔒

Multi-Tenant Data Isolation

🌟 | Pattern | Description | Payment Platform Recommendation | |---|---|---| | Shared tables…
Topic 24
📥 📥 🧠 🔬 💡 🎯

Schema Evolution aur Migrations

🚀 | Practice | Detail | |---|---| | Migration tool | Flyway / Liquibase / custom migration…
Topic 25
✨

Partitioning Strategy

📚 | Table | Partition By | Strategy | Rationale | |---|---|---|---| | payments | created_at…
Topic 26
💡 📊 🔬

Data Retention aur Archival

💡 | Data Type | Hot Retention | Warm Retention | Cold Archive | Delete |…
Topic 27
🔒

Security aur Encryption

🎯 | Layer | Implementation | Purpose | |---|---|---| | Encryption at rest | PostgreSQL TDE…
Topic 28
✨

Common Mistakes

⭐ | # | Mistake | Impact | Correct Approach | |---|---|---|---| | 1 | Float for money |…
Topic 29
✨

Problems aur Challenges

🔑 | # | Challenge | Detail | |---|---|---| | 1 | Schema migration at scale | 1B row table…
Topic 30
📥 ⚙️ 🔬 💡

Best Practices

✨ | # | Practice | Detail | |---|---|---| | 1 | Integer money | All amounts in smallest…
Topic 31
📥 📥 🧠 🔬 💡 🎯

History

🌟 | Era | Period | Development | |---|---|---| | Flat File Era | Pre-2000 | Payment records…
Topic 32
🚀

Glossary

🚀 | # | Term (English) | Hinglish Explanation | |---|---|---| | 1 | Data model | Database…
Topic 33
✨

Disclaimer

📚 Ye article sirf educational aur informational purposes ke liye hai. Schema designs…
Comparison
✨

Soft Delete vs Hard Delete

⚖️

Implementation: deleted_at TIMESTAMPTZ…

⚖️

Payment platform default: ✅ Preferred…

⚖️

Recovery: Easy — set deleted_at = NULL

Diagram
📥 ⚙️ 🔬 💡

Visual Flow

📊 Diagram visualization — details in narration
Related Topics

See Also

📖

Payment_platform_architecture

🔗

Payment_platform_core_modules

💡

Payment_platform_API_design

📚

Payment_platform_best_practices

🔑

Payment_platform_admin_panel

🌐

Database

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 1

Copyright (c) A|iens. All rights reserved. ka sabse sahi definition kya hai?

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 2

Copyright (c) A|iens. All rights reserved. ka '1' kya hai?

Complete! 🎉
COMPLETE

Copyright (c) A|iens. All rights reserved. Complete!

Aliens Wiki · HIEN · Cinematic Knowledge

✅

Copyright (c) A|iens. All rights reserved. Complete

➡️

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