fix: normalize eth_estimateGas for Hardhat on hpp

[yashvanthbl137-crypto]

Summary

Fixes failed eth_estimateGas during Hardhat contract deploys on HPP mainnet (--network hpp) when the estimate request includes gas / EIP-1559 fields from Hardhat + ethers. The hook normalizes the RPC payload to match a minimal { from, data, … } estimate (same idea as a minimal curl).

Problem

On HPP mainnet, eth_estimateGas could fail with contract creation code storage out of gas when the transaction object included fields such as gasLimit, gasPrice, maxFeePerGas, maxPriorityFeePerGas, or type. The same bytecode could estimate successfully when those fields were omitted.

@nomicfoundation/hardhat-ethers uses provider.send("eth_estimateGas", [...]), so adjusting only request() is not sufficient.

Solution

• config/hppHardhatEstimateGasFix.ts: extendEnvironment wraps send and request when hre.network.name === 'hpp' (HPP mainnet only). For eth_estimateGas, strip: gas, gasLimit, gasPrice, maxFeePerGas, maxPriorityFeePerGas, type before forwarding.
• hardhat.config.ts: import the module right after dotenv.config() so it loads for all Hardhat entrypoints.

HPP Sepolia (thpp) is unchanged — the workaround is not applied there.

Actual transaction broadcast / deploy txs are unchanged; only the estimateGas RPC shape is adjusted.

Ticket: CGARD-454

[yashvanthbl137-crypto]

v4 contracts deployment tested locally(mainnet)

batcher contract deployment tested locally(mainnet)

[yashvanthbl137-crypto]

HPP mainnet RPC returns contract creation code storage out of gas when the request includes bytecode plus gas and EIP-1559 fee fields.

eth_estimateGas succeeds (HTTP 200, result) without gas / fee fields in the params.