Get the right next trade fields on release

[grunch]

Summary by CodeRabbit

• New Features

  • Enhanced trade release and fiat sent action logic with improved handling of next trade information
  • Added more precise validation for trade-related actions based on user roles and order status

• Bug Fixes

  • Improved permission checks for trade release and fiat sent actions
  • Refined error handling for trade-related operations

[coderabbitai]

Walkthrough

The pull request modifies two key functions in the Rust codebase: fiat_sent_action in src/app/fiat_sent.rs and release_action in src/app/release.rs. The primary focus is on introducing and handling a new next_trade variable, which captures details about the subsequent trade. The changes enhance the logic for processing trades, particularly around order creation, release, and trade progression, with careful attention to public key validation and order status checks.

Changes

File	Change Summary
src/app/fiat_sent.rs	Added next_trade variable with pattern matching on payload, updating order.next_trade_pubkey and order.next_trade_index when buyer is range order creator
src/app/release.rs	Restructured next_trade handling, modified seller fund release conditions, adjusted public key and status validation logic

Sequence Diagram

sequenceDiagram
    participant Buyer
    participant Seller
    participant System
    
    Buyer->>System: Initiate Trade
    System->>System: Validate Next Trade Details
    System->>Seller: Process Trade Release
    alt Valid Seller Public Key
        System->>System: Update Order Status
        Seller->>System: Confirm Release
    else Invalid Public Key
        System->>Seller: Release Not Allowed
    end

Loading

Possibly related PRs

• Handle next trade data on release #420: Handle next trade data on release
• Handle next trade on fiatsent #421: Handle next trade on fiatsent

Poem

🐰 A rabbit's tale of trades so bright,
Where next_trade dances in the light,
Pubkeys checked with careful might,
Orders flow from wrong to right,
A code ballet of pure delight! 🔑

---

📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between a17b33b and 0769984.

📒 Files selected for processing (2)

• src/app/fiat_sent.rs (0 hunks)
• src/app/release.rs (3 hunks)

💤 Files with no reviewable changes (1)

• src/app/fiat_sent.rs

⏰ Context from checks skipped due to timeout of 90000ms (1)

• GitHub Check: tests

🔇 Additional comments (5)

src/app/release.rs (5)

87-98: LGTM! Secure seller validation.

The implementation correctly validates that only the seller can release funds, with appropriate error handling.

---

Line range hint 113-127: LGTM! Clear status validation.

The status validation is comprehensive and well-implemented, with clean error handling using the matches! macro.

---

Line range hint 211-222: LGTM! Proper cleanup of next trade fields.

The implementation correctly cleans up next trade fields and safely handles type conversion for the index.

---

99-111: Verify potential integer overflow.

While the pattern matching logic is well-structured, there's a potential risk when casting next_trade_index from i64 to u32 on line 108.

Run this script to check for large index values that could cause overflow:

✅ Verification successful

Casting between next_trade_index types is safe

The integer casting in this code is safe because:

• Values originate as u32 from the NextTrade payload
• They are stored as i64 in the database and struct
• Converting back to u32 cannot overflow as the values are guaranteed to be within u32 range

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check for potentially large next_trade_index values
# that could overflow when cast to u32

rg -l "next_trade_index.*[0-9]{10,}" 

# Check for any explicit large number assignments
ast-grep --pattern 'next_trade_index = Some($NUM)' | grep -E '[0-9]{10,}'

Length of output: 114

---

Script:

#!/bin/bash
# Check type definition and usage of next_trade_index
rg "next_trade_index" -B 2 -A 2

# Find struct definition containing next_trade_index
ast-grep --pattern 'struct $_ {
  $$$
  next_trade_index: $_,
  $$$
}'

Length of output: 2327

---

Line range hint 1-498: Consider adding test coverage for next_trade scenarios.

The changes introduce complex logic for handling next_trade, but there appears to be no corresponding test coverage for these scenarios. Consider adding tests for:

• Different next_trade patterns (creator vs stored values)
• Edge cases in index handling
• Status validation with next_trade

Run this script to check for existing test coverage:

---

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