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open-ibc / vibc-core-smart-contracts

Apache License 2.0
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add fee vault threshold to prevent indexer spam #189

Closed RnkSngh closed 2 months ago

RnkSngh commented 2 months ago

PR to add fee Vault threshold to prevent indexer spam for fee deposited events, as was discussed in the Informal Systems audit

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Commits Files that changed from the base of the PR and between 88919ebe4fd7857f743e80bc3cb5303756ce6326 and ab8e500b5122c8ec9c27d67b1e804449fdb7986b.

Walkthrough

The updates include the introduction of a minimumFeeThreshold modifier in the FeeVault contract to enforce a minimum transaction fee of 1 gwei, preventing spam attacks. The IFeeVault interface has been modified to change the error message from NoFeeSent() to FeeThresholdNotMet(). Additionally, the project version in package.json has been incremented from 3.0.3 to 3.0.4, and new tests have been added to ensure compliance with the fee requirements.

Changes

File Change Summary
contracts/core/FeeVault.sol Added minimumFeeThreshold modifier; updated depositSendPacketFee and depositOpenChannelFee functions to use this modifier. Updated documentation comments.
contracts/interfaces/IFeeVault.sol Changed error declaration from NoFeeSent() to FeeThresholdNotMet().
package.json Updated version from 3.0.3 to 3.0.4.
test/FeeVault.t.sol Added new import for IFeeVault; modified gasFee1 to a minimum of 1 gwei; added testRevert_BelowFeeThreshold function.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant FeeVault
    participant IFeeVault

    User->>FeeVault: depositSendPacketFee(1 gwei)
    FeeVault->>FeeVault: minimumFeeThreshold check
    alt Fee meets threshold
        FeeVault->>User: Transaction successful
    else Fee below threshold
        FeeVault->>User: revert with FeeThresholdNotMet()
    end

🐇 "In the vault where fees do dwell,
A threshold set to guard us well.
One gwei must be sent with care,
To keep the spammers from our lair.
With tests to check and code refined,
A safer path for all aligned!" 🐇

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