f(x)Core v2.2.0 Upgrade Instructions

This document describes the steps for validator and full node operators for the successful execution of the f(x)Core v2.2.0 Upgrade

The upgrade contains the following main new feature/improvement:

Bug Fixes

• Fix transaction msg MsgConvertCoin MsgConvertERC20 too much gas

• Fix crosschain to ethereum

• Fix tendermint subcommand

New

• Add query oracle reward in the cross-chain module

• Check fxcored version when synchronizing blocks from scratch

• Add denom many to one support

• Update RegisterCoinProposal support denom many to one

• Add UpdateDenomAliasProposal and MsgConvertDenom

• Enable f(x)Core Gravity Cross-Chain Bridge to allow a many-to-one ERC20 token mapping feature.

  • This would allow tokens from different chains (registered on the bridge) to be bridged into f(x)Core forming a unified token which is chain agnostic.

  • Example: ETH-USDT, Polygon-USDT, Tron-USDT cross-chain through the Gravity Cross-Chain Bridge, then converted by the fx-ERC20 module, and unified into a FX-USDT ERC20 Token upon entering fx-evm.

• Any addition of new tokens to this Gravity Cross-Chain Bridge feature logic would have to go through governance.

  • The proposal would need to be launched under the proposal type "RegisterCoinProposal"

Note: You may refer to the latest news and releases information in the official FunctionX Github

Note: Refer to Binaries upgrade steps or Docker upgrade steps

Testnet upgrade plan:

• Code release time: The Testnet code is expected to be released by 6pm (GMT+8) on Friday, 22 July 2022.

• Upgrading validator nodes:

  • Validators can update their node once the code is released (please read about the difference between Software Upgrade and Hard Fork here). The upgrade height will be written in the code. The upgrade height time will tentatively be set at 12pm (GMT+8) on Monday, 25 July 2022.

  • The validator must update the Testnet node before the upgrade height, otherwise it will result in issues with consensus because of the inconsistencies of versions with other validators.

• Initiate a many-to-one cross-chain proposal to add USDT

  • The node will not apply the update content until it reaches the upgrade height, thereafter, there will be a need to send a RegisterCoinProposal proposal after the upgrade height to add USDT to the list of tokens in the many-to-one cross-chain feature.

  • The Testnet proposal voting period has been changed from 2 days to 2 hours.

• The proposal is expected to pass at 2pm (GMT+8) on Monday, 25 July 2022.

• All tests on the testnet will be completed by Tuesday, 26 July 2022.

Mainnet Upgrade Plan

• Code release time: The Mainnet code is expected to be released in the morning of Wednesday, 27 July 2022.

• Upgrading validator nodes:

  • Validators can update their node once the code is released (please read about the difference between Software Upgrade and Hard Fork here). The upgrade height will be written in the code. The upgrade height time will tentatively be set at 12pm (GMT+8) on Monday, 1 August 2022.

  • The validator must update the Mainnet node before the upgrade height, otherwise it will result in issues with consensus because of the inconsistencies of versions with other validators

• Initiate a many-to-one cross-chain proposal to add USDT

  • The node will not apply the update content until it reaches the upgrade height, thereafter, there will be a need to send a RegisterCoinProposal proposal after the upgrade height to add USDT to the list of tokens in the many-to-one cross-chain feature.

  • Proposal cycle is 14 days

• The proposal is expected to pass on Monday, 15 August 2022.