fix: set target difficulty before syncing

[stringhandler]

Summary by CodeRabbit

• Refactor
  • Enhanced block generation logic with dynamic difficulty adjustments based on system synchronization status. When the system is not fully synced, alternative parameters are applied to ensure more flexible and consistent handling of difficulty requirements.

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Walkthrough

The changes modify the get_new_block method in the ShaP2PoolGrpc struct. The variable target_difficulty is now declared as mutable, enabling its reassignment. A new conditional block checks if the system is not synchronized and, in that case, reassigns target_difficulty using the value from miner_data.target_difficulty after converting it to the appropriate Difficulty type. The comments also indicate an intent to reduce redundancy in future iterations.

Changes

File	Change Summary
src/.../p2pool.rs	- Made target_difficulty mutable in get_new_block. - Added a conditional block to update target_difficulty from miner_data if not synced. - Updated comment regarding future data handling improvements.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant ShaP2PoolGrpc
    Client->>ShaP2PoolGrpc: get_new_block()
    ShaP2PoolGrpc->>ShaP2PoolGrpc: Initialize shares and target_difficulty
    alt System Not Synced
        ShaP2PoolGrpc->>ShaP2PoolGrpc: Update target_difficulty from miner_data
    else System Synced
        ShaP2PoolGrpc->>ShaP2PoolGrpc: Use computed target_difficulty
    end
    ShaP2PoolGrpc->>Client: Return new block

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Oh, what a hop in the code today,
A mutable twist cleared the way.
When syncing sleeps, miner data sings,
New targets rise on freshly spread wings.
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📥 Commits

Reviewing files that changed from the base of the PR and between 9c9323e and d22fb52.

📒 Files selected for processing (1)

• src/server/grpc/p2pool.rs (2 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (3)

• GitHub Check: test (esmeralda)
• GitHub Check: clippy
• GitHub Check: cargo check with stable

🔇 Additional comments (2)

src/server/grpc/p2pool.rs (2)

299-299: Good change: Making target_difficulty mutable

This change enables reassignment of the target_difficulty variable later in the method, which is necessary for the fix implemented below.

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379-384: Correctly ensures proper difficulty setting when not synced

This change addresses the issue mentioned in the PR title. When the system is not synchronized, it now uses the target difficulty from miner_data provided by the base node instead of the calculated value from the share chain. This ensures miners receive the correct target difficulty before synchronization is complete.

The comment also appropriately documents the future intent to remove the redundancy of maintaining both target_difficulty and miner_data.target_difficulty.

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