Make issuer transfer expiry configurable per-offering instead of fixed 7-day ISSUER_TRANSFER_EXPIRY_SECS

[thlpkee20-wq]

Description

accept_issuer_transfer enforces a hardcoded ISSUER_TRANSFER_EXPIRY_SECS of 7 days. Some governance flows need shorter or longer windows. Add an optional per-offering expiry override (bounded by a sane maximum) that propose_issuer_transfer records and accept_issuer_transfer honors.

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review
• Relevant code: src/lib.rs (propose_issuer_transfer, accept_issuer_transfer, PendingTransfer, ISSUER_TRANSFER_EXPIRY_SECS)
• Default must remain 7 days when no override is provided

Suggested execution

• Fork the repo and create a branch
• git checkout -b feat/configurable-issuer-transfer-expiry
• Implement changes
  • Add an optional expiry_secs to propose_issuer_transfer or a separate setter
  • Store the effective expiry in PendingTransfer and use it in accept_issuer_transfer
  • Clamp to [MIN_EXPIRY, MAX_EXPIRY] bounds
• Validate security and correctness assumptions

Test and commit

• Run tests
  • cargo test
• Cover edge cases
  • Accept at exactly expiry boundary, below minimum, above maximum, default path
• Include test output and security notes

Example commit message

feat: support configurable issuer transfer expiry

Guidelines

• Minimum 95 percent test coverage
• Clear documentation
• Timeframe: 96 hours

[Abdulmajeed82]

@Abdulmajeed82 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would like to work on this issue pls

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[drips-wave]

Congratulations, @Abdulmajeed82! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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