Issue: Legacy Ethereum JSON ABI entries with "payable": true are not recognized

Issue: Legacy Ethereum JSON ABI entries with "payable": true are not recognized: a task in LegoFlow-SWE (Harbor dataset). When parsing Ethereum JSON ABI entries in the legacy format (using the fields "constant" and "payable" instead of the modern "stateMutability" ), the function's payable…

The task

When parsing Ethereum JSON ABI entries in the legacy format (using the fields `"constant"` and `"payable"` instead of the modern `"stateMutability"`), the function's `payable` modifier is missing from the generated Solidity interface.

Part of Lego-X/LegoFlow-SWE.