params: start osaka fork #31125

[gzliudan]

Proposed changes

start osaka fork

Ref: ethereum#31125

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)
• Regular KTLO or any of the maintaince work. e.g code style
• CICD Improvement

Impacted Components

Which part of the codebase this PR will touch base on,

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• Consensus
• Account
• Network
• Geth
• Smart Contract
• External components
• Not sure (Please specify below)

Checklist

Put an ✅ in the boxes once you have confirmed below actions (or provide reasons on not doing so) that

• This PR has sufficient test coverage (unit/integration test) OR I have provided reason in the PR description for not having test coverage
• Provide an end-to-end test plan in the PR description on how to manually test it on the devnet/testnet.
• Tested the backwards compatibility.
• Tested with XDC nodes running this version co-exist with those running the previous version.
• Relevant documentation has been updated as part of this PR
• N/A

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[Copilot]

Pull request overview

This PR introduces Osaka fork awareness into the chain configuration and EVM selection logic, and wires the new fork into the global constants for all networks without activating it on mainnet/testnet/devnet yet.

Changes:

• Extend ChainConfig and fork-handling helpers to support an OsakaBlock parameter, including description output, compatibility checks, and Rules.
• Wire Osaka fork block into global constants for mainnet, testnet, devnet, and local networks, plus the shared constant struct and CopyConstants.
• Update EVM instruction set lookup to recognize Prague as a fully defined fork (using the Prague jump table) and add a placeholder Osaka case that currently returns the Prague instruction set with an explicit "osaka-fork not defined yet" error.
• Fix outdated comments referring to Ropsten by clarifying that the configs are for Apothem testnet and devnet.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
params/config.go	Adds OsakaBlock to ChainConfig, initializes it for the various protocol-change configs, includes it in description output, compatibility checks, and Rules, and corrects testnet/devnet comments.
core/vm/jump_table_export.go	Updates LookupInstructionSet to fully enable Prague’s instruction set and introduce an Osaka case that currently reuses the Prague instruction set while signaling that the Osaka fork is not yet defined.
common/constants.testnet.go	Adds an osakaBlock field for Apothem testnet, initially set to math.MaxInt64 (disabled / far-future).
common/constants.mainnet.go	Adds an osakaBlock field for mainnet, initially set to math.MaxInt64 (disabled / far-future).
common/constants.local.go	Adds osakaBlock for local networks and moves Prague to block 0 so both Prague and Osaka are active from genesis for local testing.
common/constants.devnet.go	Adds an osakaBlock field for devnet, initially set to math.MaxInt64 (disabled / far-future).
common/constants.all.go	Extends the shared constant struct and the per-network global variables to include osakaBlock, and ensures CopyConstants correctly propagates the Osaka fork block.

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