Upgrade Announcement: Telos EVM 2.0 Deployment and Migration Guidelines

Dear Valued Partners,

We are pleased to announce that as of November 20, 2024, Telos EVM version 2.0 has been successfully deployed to production. It is now accessible at:

• Mainnet: https://rpc.telos.net
• Testnet: https://rpc.testnet.telos.net

Key Features and Technical Considerations

This significant upgrade brings our network closer to feature parity with Ethereum while reducing the install footprint. However, there are a few technical considerations to note:

1. EIP-1559 Supportsome text
   • The fee market change introduced in the London hard fork (EIP-1559) is still under development and not yet supported.
2. Long-Running Operationssome text
   • Long-running multicall (eth_call) read-only operations will no longer time out.
   • Long-running transactions, however, remain constrained and should be batched.
3. Solidity Version Limitationssome text
   • No new changes to Solidity version compatibility. Version 0.8.23 is fully supported, and 0.8.24 is partially supported. See more details here.

Transitioning to Version 2.0

To modernize our infrastructure, we will discontinue support for EVM versions 1.0 and 1.5 in phases. Partners should prepare for this transition to avoid disruption.

Block Hash Calculation Changes

Version 2.0 introduces a new block hash calculation methodology:

• Partners not relying on block hashes can migrate seamlessly.
• For those dependent on block hashes (e.g., exchanges, indexers, subgraphs), re-indexing the chain may be required.

Note: Transaction hashes remain unchanged.

Rate-Limiting for Legacy Versions

Effective January 6, 2025, we will begin rate-limiting all Telos hosted 1.x RPC infrastructure:

• Initial limits: 50 requests per second
• Further reductions will follow to encourage migration to version 2.0.

Deprecated RPC Endpoints

The following Mainnet RPC endpoints will soon no longer be supported:

• mainnet.telos.net/evm
• mainnet15.telos.net/evm
• mainnet-us.telos.net/evm
• mainnet-eu.telos.net/evm
• mainnet-asia.telos.net/evm

Resources for Node Operators

If you are interested in running your own Telos EVM node, detailed resources are available:

• Installer Script and Documentation: GitHub Repository
• Support: Telos Developer Community

Next Steps

We strongly encourage all partners to begin migrating to Telos EVM 2.0 as soon as possible to take advantage of its enhanced capabilities and ensure uninterrupted service.

Best regards,

Telos Core Developers