feat: add gasevm (Neo X) EVM chain support

[imkushagra12-bitgo]

Summary

Adds Neo X (gasevm) EVM chain support to eth-multisig-v4 and deploys V4 wallet + Batcher contracts on testnet.

Changes

• config/chainIds.ts — Added GASEVM (47763) and GASEVM_TESTNET (12227332)
• scripts/chainConfig.ts — Gas config for gasevm (EIP-1559, maxFeePerGas: 50 Gwei, maxPriorityFeePerGas: 20 Gwei, gasLimit: 3_000_000). Neo X requires minGasTipCap of 20 Gwei.
• hardhat.config.ts — Network entries, apiKey, and customChains for explorer verification
• config/batcherDeployGasConfig.ts — manual-gas strategy with minPriorityFeeGwei: 20 for Neo X
• deployUtils.ts — CHAIN_VERIFICATION_OVERRIDES: maxRetries: 0 (manual verification via Blockscout API)
• .github/workflows/deploy_and_release.yml — Added gasevm/tgasevm to tag regex and deploy conditions
• .github/workflows/deploy_batcher_contract.yml — Added gasevm/tgasevm to tag regex and deploy conditions

Deployed Addresses (Testnet: tgasevm, chainId: 12227332)

Contract	Address
WalletSimple	0x6fd2b4c6dd1150fce228d02785cbf69f811b7e76
WalletFactory	0x654C828882eBb78F191129CD04C90635bB85258C
ForwarderV4	0xca07f6C84a787b38299c61c865ca526fF88f69bA
ForwarderFactoryV4	0xcA5944d45B5EA52a8bC50D011DcF6398327d66e9
Batcher	0x93a2299BcC9A55a886D74eE3447C787f38c3d988

Explorer

Testnet: https://neoxt4scan.ngd.network

Notes

• Neo X requires a minimum gas tip (minGasTipCap) of 20 Gwei — both baseFee and priority fee must be ≥ 20 Gwei
• Blockscout explorer uses a non-standard API port (8877); verification was performed manually via the Blockscout API
• Batcher is Exact Match verified; WalletSimple, WalletFactory, ForwarderV4, ForwarderFactoryV4 are Partial Match (bytecode confirmed)

Ticket: CECHO-1465

[Copilot]

Pull request overview

Adds Neo X (gasevm) EVM chain support across deployment tooling so the V4 wallet + Batcher contracts can be deployed/verified and CI workflows can recognize gasevm/tgasevm release tags.

Changes:

• Added GASEVM / GASEVM_TESTNET chain IDs and wired them into chain-specific gas configuration.
• Added Hardhat network + explorer verification configuration entries for gasevm/tgasevm.
• Updated deploy workflows to recognize gasevm / tgasevm tags and allow deploy jobs to run for those networks.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
scripts/chainConfig.ts	Adds Neo X chain cases with explicit EIP-1559 gas params.
hardhat.config.ts	Adds gasevm networks + explorer customChains and adjusts Sourcify config.
deployUtils.ts	Adds Neo X verification overrides (confirmation blocks / retry behavior).
config/chainIds.ts	Introduces GASEVM and GASEVM_TESTNET chain IDs.
config/batcherDeployGasConfig.ts	Adds Neo X “manual-gas” strategy with minimum priority fee.
.github/workflows/deploy_batcher_contract.yml	Extends tag parsing + deploy gating to include gasevm/tgasevm.
.github/workflows/deploy_and_release.yml	Extends tag parsing + deploy gating to include gasevm/tgasevm.

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

[manojkumar138]

LG