fix(api): change gas_price to use pending block

[yiweichi]

1. Purpose or design rationale of this PR

The eth_gasPrice API returns gas price based on latest block, but eth_estimateGas use gas price based on pending block. So if we use the eth_gasPrice API gas price to do an eth_estimateGas API call, there is a possibility it will fail and return max fee per gas less than block base fee. that's because if L1 gas spike and gas-oracle updates the l1BaseFee, the pending block baseFee will be higher than the one based on latest block.
So I think we could change eth_gasPrice API to return gas price based on pending block, that will prevent this issue, and provides a more accurate suggest gas price.

See more details here: https://www.notion.so/scrollzkp/l2geth-returns-wrong-gas-price-issue-1297792d22af8045bbb1e57ff974e6c7

2. PR title

Your PR title must follow conventional commits (as we are doing squash merge for each PR), so it must start with one of the following types:

• fix: A bug fix

3. Deployment tag versioning

Has the version in params/version.go been updated?

• This PR doesn't involve a new deployment, git tag, docker image tag, and it doesn't affect traces
• Yes

4. Breaking change label

Does this PR have the breaking-change label?

• This PR is not a breaking change
• Yes

Summary by CodeRabbit

Summary by CodeRabbit

• New Features

  • Enhanced gas price suggestion logic for improved accuracy.
  • Streamlined transaction sending process with clearer method naming.
  • Added method for retrieving pending block data and receipts.

• Bug Fixes

  • Improved error handling pathways for block retrieval in gas price calculations.

• Chores

  • Incremented patch version from 24 to 25, reflecting updates in the software release.

[coderabbitai]

Walkthrough

The changes in this pull request primarily focus on the GasPrice and SendTransaction methods within the PublicEthereumAPI struct in internal/ethapi/api.go. The GasPrice method's logic is updated to fetch the base fee from a pending block, enhancing error handling. The SignAndSendTransaction method is renamed to SendTransaction, reflecting a shift in API clarity while maintaining the same functionality. Additionally, the VersionPatch constant in params/version.go is incremented from 24 to 25, updating the versioning scheme without altering other logic in the file. A new method, PendingBlockAndReceipts, is added to the Backend interface in internal/ethapi/backend.go.

Changes

File	Change Summary
internal/ethapi/api.go	Updated GasPrice method to retrieve base fee from pending block; renamed SignAndSendTransaction to SendTransaction.
internal/ethapi/backend.go	Added PendingBlockAndReceipts() method to Backend interface.
params/version.go	Incremented VersionPatch constant from 24 to 25, affecting version output formatting.

Poem

In the code where rabbits hop,
Gas prices rise, they never stop.
With a new name, transactions fly,
Version's up, oh my, oh my!
Hopping through changes, swift and bright,
Code's a dance, a pure delight! 🐇✨

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[coderabbitai]

Actionable comments posted: 2

🧹 Outside diff range and nitpick comments (1)

internal/ethapi/backend.go (1)

66-66: Add documentation for the new method.

The method signature looks good and aligns well with the interface's design. However, please add documentation to clarify:

• The purpose of this method
• Whether the returned block/receipts can be nil
• Any thread safety guarantees

Consider this documentation:

+// PendingBlockAndReceipts returns the currently pending block and associated receipts.
+// Both return values may be nil if no block is pending.

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 7ea1d52 and d13e8fd.

📒 Files selected for processing (2)

• internal/ethapi/api.go (1 hunks)
• internal/ethapi/backend.go (1 hunks)

🔇 Additional comments (1)

internal/ethapi/api.go (1)

71-73: LGTM! The changes improve gas price estimation accuracy.

The modification to use pending block's base fee instead of latest block's base fee is a good improvement that will help prevent transaction failures during L1 gas price spikes. The implementation is robust with proper nil checks for both pending block and base fee.