Add basic coin-store bench

[t1plarnd]

No description provided.

[greptile-apps]

Greptile Summary

Adds Criterion-based benchmarks for the coin-store crate to measure UTXO query performance under different filter configurations (default, entropy, contracts, token tags).

The PR includes:

• Shared benchmark setup code (common.rs) that creates a test database with 10 transactions containing options contracts
• Four separate benchmark suites testing query performance with increasingly complex filters
• Removal of unused hex dev-dependency
• Addition of simplicityhl-core as a regular dependency for testnet constants

The benchmarks follow a standard pattern: setup database with test data, run queries with black_box to prevent optimization, then cleanup. Each benchmark configures criterion with 10 samples and 10-second measurement windows.

Confidence Score: 4/5

• This PR is safe to merge with minor style improvements recommended
• The PR adds well-structured benchmark code that follows Criterion best practices. The implementation is functionally correct and won't affect production code. Score reduced by 1 due to minor style issues: hardcoded database path that could cause race conditions if benchmarks run concurrently, use of identical keypairs limiting data diversity, and an empty error message.
• Pay attention to crates/coin-store/benches/common.rs for the style improvements mentioned in comments

Important Files Changed

Filename	Overview
crates/coin-store/Cargo.toml	Added benchmark dependencies and configuration, removed unused hex dependency
crates/coin-store/benches/common.rs	Created shared benchmark setup code with database and filter initialization

Sequence Diagram

sequenceDiagram
    participant B as Benchmark Suite
    participant C as common::setup_db()
    participant S as Store
    participant DB as SQLite Database
    
    B->>C: Initialize benchmark
    C->>DB: Remove old /tmp/benchmark_stress.db
    C->>S: Store::create()
    S->>DB: Create tables and run migrations
    
    loop 10 iterations
        C->>C: Generate keypair (same key)
        C->>C: setup_tx_and_contract()
        C->>C: Generate random entropy
        C->>C: Build option creation tx
        C->>S: insert_transaction(tx, blinder_keys)
        S->>DB: Mark inputs as spent (noop)
        S->>DB: Insert UTXOs
        C->>S: add_contract(source, args, tpg)
        S->>DB: Store contract metadata
        C->>S: insert_contract_token(tpg, asset_id)
        S->>DB: Store token mapping
        C->>C: Build filters (default, entropy, contracts, token)
    end
    
    C-->>B: Return (store, filters, db_path)
    
    loop Benchmark iterations
        B->>S: query_utxos(filters)
        S->>DB: Execute SQL queries with filters
        DB-->>S: Return matching UTXOs
        S-->>B: UtxoQueryResult
    end
    
    B->>DB: Remove /tmp/benchmark_stress.db

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[greptile-apps]

_{6 files reviewed, 3 comments}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

style: same keypair used in every iteration - all UTXOs will have identical blinding keys, which may not accurately represent real-world query performance with diverse data

_{Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!}

Prompt To Fix With AI

This is a comment left during a code review.
Path: crates/coin-store/benches/common.rs
Line: 95:95

Comment:
**style:** same keypair used in every iteration - all UTXOs will have identical blinding keys, which may not accurately represent real-world query performance with diverse data

<sub>Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!</sub>

How can I resolve this? If you propose a fix, please make it concise.

[t1plarnd]

The main mission of thins fn is to set up a database for query testing, and in my opinion, it does not affect query processing time.

[greptile-apps]

style: empty error message won't help debug if insert_contract_token fails

Suggested change

	.expect("");
	.expect("Failed to insert contract token");

Prompt To Fix With AI

This is a comment left during a code review.
Path: crates/coin-store/benches/common.rs
Line: 122:122

Comment:
**style:** empty error message won't help debug if `insert_contract_token` fails

```suggestion
            .expect("Failed to insert contract token");
```

How can I resolve this? If you propose a fix, please make it concise.

[t1plarnd]

This is my mistake, I will fix it.its my bad, i will fix that

[greptile-apps]

style: hardcoded database path could cause conflicts if multiple benchmarks run concurrently - consider using a unique path per benchmark or test run

Prompt To Fix With AI

This is a comment left during a code review.
Path: crates/coin-store/benches/common.rs
Line: 84:84

Comment:
**style:** hardcoded database path could cause conflicts if multiple benchmarks run concurrently - consider using a unique path per benchmark or test run

How can I resolve this? If you propose a fix, please make it concise.

[t1plarnd]

In my opinion, the main way to optimize a database is to configure it to use one (possibly large) function and only configure filters. So if I have one database with a dataset, I don't need to store it in different places.

[KyrylR]

Let's Result here to avoid unwraps

[KyrylR]

Is it possible to make this function async?