Add Stellar integration for token operations

[ISTIFANUS-N]

Description:
Implement Stellar-specific token operations including asset issuance, trust lines, and payment processing within the smart contracts.

[drips-wave]

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[Gbangbolaoluwagbemiga]

@Gbangbolaoluwagbemiga has applied to work on this issue as part of the Stellar Wave Program's 1st wave.

GM GM, I have gone through the issue and I will be able to handle this. Please assign this to me.

I specialize in implementing Stellar token operations in Soroban smart contracts with asset issuance and payment processing.

Background:

• 4+ years Smart Contract Developer with Web3Bridge
• Won Scaffold Stellar Hackathon with SecureFlow (implemented token operations)
• Expert in Rust, Soroban SDK, Stellar token standards
• Experience with asset issuance, trust lines, and payment flows
• Built multiple token-based smart contracts on Stellar

What I'll Deliver:

Asset Issuance:

• Token creation and minting
• Asset configuration
• Supply management
• Issuer controls

Trust Line Operations:

• Trust line establishment
• Trust line validation
• Asset authorization
• Trust line queries

Payment Processing:

• Token transfers
• Payment validation
• Balance updates
• Transaction verification

Integration:

• Soroban token interface
• Cross-contract calls
• Event emission
• Error handling

Security:

• Authorization checks
• Balance validation
• Overflow protection
• Access control

Testing:

• Token operation tests
• Trust line tests
• Payment flow tests
• Edge case coverage

LFG! I'm excited to bring Stellar token power to TeachLink!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Gbangbolaoluwagbemiga to this issue.

[drips-wave]

Congratulations, @Gbangbolaoluwagbemiga! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on January 31, 2026.

🧑‍💻 @Gbangbolaoluwagbemiga: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

⚠️ Important: When opening a PR, please link it to this issue to ensure it gets tracked accurately.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[Gbangbolaoluwagbemiga]

@ISTIFANUS-N please close issue, would apprecaite dropping a review too

[drips-wave]

This issue has been completed by @Gbangbolaoluwagbemiga as part of the Stellar Wave Program's 1st Wave 🥳

😎 @Gbangbolaoluwagbemiga: You earned 150 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here.

🧑‍💻 Repo maintainers: How'd the contributor do? If you like, you can reward them with additional points by making a compliment within seven days after the Wave Program's current wave ends.

[drips-wave]

@Gbangbolaoluwagbemiga received 4 compliments:

• Good Communicator: +50 points
• Fast & Easy: +50 points
• High-Quality Code: +50 points
• Problem Solver: +50 points