Add AppLayer Testnet Network

[itamarcps]

Summary by CodeRabbit

• New Features
  • Added support for the AppLayer Testnet network, including full network configuration and integration.
  • Users can now view and interact with the AppLayer Testnet within the network selection options.

[coderabbitai]

Walkthrough

A new Ethereum-compatible network, "AppLayer Testnet," was integrated into the codebase. This involved adding its identifier to the network enum, defining its configuration and endpoints, updating the network index to export it, and registering its Etherscan-compatible activity handler endpoint.

Changes

Cohort / File(s)	Change Summary
Network Enum Update packages/types/src/networks.ts	Added AppLayerTestnet to the NetworkNames enum.
Etherscan Endpoint Mapping packages/extension/src/providers/ethereum/libs/activity-handlers/providers/etherscan/configs.ts	Added AppLayerTestnet endpoint URL to NetworkEndpoints.
Network Configuration packages/extension/src/providers/ethereum/networks/applayer-testnet.ts	Introduced new network config for AppLayer Testnet, including metadata, RPC, explorer, icon, and activity handler.
Network Index Export packages/extension/src/providers/ethereum/networks/index.ts	Imported and exported appLayerTestnet in the default export object.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant Extension
    participant AppLayerTestnet RPC
    participant AppLayerTestnet Explorer API

    User->>Extension: Selects AppLayer Testnet
    Extension->>AppLayerTestnet RPC: Sends JSON-RPC requests (e.g., get balance)
    AppLayerTestnet RPC-->>Extension: Returns blockchain data
    Extension->>AppLayerTestnet Explorer API: Fetches activity/transactions
    AppLayerTestnet Explorer API-->>Extension: Returns activity data
    Extension-->>User: Displays network info and activity

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Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• Add Cytonic Testnet network #686: Both PRs add a new Ethereum-compatible testnet network by extending the same set of files and constructs—network enum, network configuration module, network index export, and Etherscan activity handler endpoints—with analogous changes for different testnets.

Suggested reviewers

• kvhnuke
• SemajaM8

Note

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📜 Recent review details

Configuration used: .coderabbit.yaml
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between e3fdc76 and 415019d.

📒 Files selected for processing (4)

• packages/extension/src/providers/ethereum/libs/activity-handlers/providers/etherscan/configs.ts (1 hunks)
• packages/extension/src/providers/ethereum/networks/applayer-testnet.ts (1 hunks)
• packages/extension/src/providers/ethereum/networks/index.ts (2 hunks)
• packages/types/src/networks.ts (1 hunks)

🔇 Additional comments (7)

packages/types/src/networks.ts (1)

116-116: LGTM! Network identifier follows established pattern.

The addition of AppLayerTestnet to the enum is consistent with existing entries and properly placed at the end to avoid disrupting existing order.

Note: Consider adding a corresponding entry to the CoingeckoPlatform enum if price data tracking is needed for this testnet in the future.

packages/extension/src/providers/ethereum/networks/index.ts (2)

81-81: LGTM! Import follows established pattern.

The import statement for appLayerTestnet is consistent with other network imports in the file.

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173-173: LGTM! Export integration is correct.

The network is properly added to the default export object, making it accessible alongside other networks.

packages/extension/src/providers/ethereum/libs/activity-handlers/providers/etherscan/configs.ts (1)

80-80: Verified Etherscan compatibility for AppLayerTestnet endpoint

Balance and transaction APIs on https://testnet-explorer.applayer.com/api/ return the expected Etherscan-style JSON:

• Balance endpoint
• Request: ?module=account&action=balance&address=0x…&tag=latest
• Response: { "message":"OK", "result":"0", "status":"1" }

• Transaction list endpoint
• Request: ?module=account&action=txlist&address=0x…&startblock=0&endblock=99999999&sort=asc
• Response: { "message":"OK", "result":[ …transactions… ], "status":"1" }

No further changes needed.

packages/extension/src/providers/ethereum/networks/applayer-testnet.ts (3)

1-6: LGTM! Imports and dependencies are correct.

All necessary imports are present and follow the established patterns for network configuration files.

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22-24: LGTM! Network instantiation and export are correct.

The EvmNetwork instance is properly created with the defined options and exported as the default export.

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7-20: Configuration Verified: AppLayer Testnet Parameters OK

All key network parameters have been validated and are correct:

• Chain ID 0x1264a is unique in the codebase.
• RPC endpoint at https://testnet-api.applayer.com returns 0x1264a as expected.
• Icon asset applayer.webp exists at
  packages/extension/src/providers/ethereum/networks/icons/applayer.webp.

No further action required.

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