PIP-42: Paloma Mainnet upgrade to Paloma v1.8.0 & Pigeon v1.8.0 - Gravity Bridge Release

PIP Name: PIP-42: Paloma Mainnet upgrade to Paloma v1.8.0 & Pigeon v1.8.0 - Gravity Bridge Release

Status: Proposed

Author(s): @LARRY

Type: Software Upgrade


Created: 09/06/2023

Simple Summary

This is a software upgrade for Paloma to v1.8.0 and Pigeon to v1.8.0 tags after the completion of the public testnet deployment with upgraded binaries. This software upgrade adds additional validator happiness fixes for pigeon jailing. It also delivers the first version of the Paloma Gravity bridge.


The Paloma mainnet continues to achieve the goal of fast and reliable validator node support for effective cross-chain communication and cross-chain relay functionality. One of the key value propositions for Paloma was its objective to allow anyone to create cross-chain order execution from with the Cosmos to any other chain. The flock wants to build a fast cross-chain EVM bridge that supported both arbitrary logic and atomic token lock and unlock that will work well with IBC. Gravity as an IBC pattern was the logical approach. It’s security and lightweight structure would allow the Paloma flock to go to market quickly and create valuation applications that would attract more developers and more validators.


  1. Deploy further support for validator sets during cross-chain deployment
  2. Migrate L2 cross-chain relay to the Arbitrum Ethereum Go client
  3. Update Optimism and other EVM L2s to leverage new GETH client with Arbitrum support.

Specification Overview

This action requires an upgrade of palomad to the latest tag v1.8.0 and an upgrade of pigeond to v1.8.0. All migrations are included and have been tested live for the past week (September 7 - September 15) on the Paloma public testnest paloma-testnest-15. Validators simply need to install the new binary and restart their nodes at chainhalt.

Technical Specification

The latest releases of Paloma and Pigeon are available here and includes the change logs for each for review prior to deployment:

  1. Download and install the latest Paloma tag: Release v1.8.0 · palomachain/paloma · GitHub
  2. Download and install the latest Pigeon tag: Release v1.8.0 · palomachain/pigeon · GitHub
  3. An upgrade proposal that must be submitted by anyone running a node on the network. This proposal should have the correct block height.
  4. Please use the following spreadsheet to calculate the approximate Block Height. https://docs.google.com/spreadsheets/d/1bglxgcFFhPnOdNYVnBcDyZ_UVuIQqGbtIP8l291jRm0/edit#gid=0 5
  5. This upgrade proposal requires 10 GRAIN or 10000000ugrain for deposit for voting.
  6. IMPORTANT: The upgrade height is the block height where the chain halts and requires the upgrade. Allow at least one (1) day AFTER voting end time and upgrade-height for 2/3 of the network to have downloaded the new binary and prepped for the switch over to avoid/minimize downtime of the Paloma chain.
  7. The Target block height for chain halt for this proposal is tentatively 4357668 or approximately 09/11/2023 14:51 UTCSee ([NG] Explorer | Paloma | 4357668)

palomad tx gov submit-legacy-proposal software-upgrade v1.8.0 \
  --title "Upgrade to Paloma v1.8.0 and Pigeon v1.8.0" \
  --description "Upgrade Paloma and Pigeon to support Gravity Bridge!" \
  --deposit 10000000ugrain \
  --fees 500ugrain \
  --upgrade-height $UPGRADE_HEIGHT \
  --upgrade-info '{"binaries":{"linux/amd64":"https://github.com/palomachain/paloma/releases/download/v1.8.0/paloma_Linux_x86_64.tar.gz"}}' \
  --gas 400000 \
  --from=<Your Paloma Address> \
  --chain-id messenger \
  --no-validate \

How to Vote on the Proposal

palomad tx gov vote 28 yes \
--chain-id=messenger \
--from <Your Paloma Address> \
--fees 400ugrain \

How to check if 2/3 of the network are online after vote is complete

curl -s localhost:26657/consensus_state | jq -r ".result.round_state.height_vote_set[0].prevotes_bit_array"

—> needs to return ≥ ~0.67 for the chain to start up again

To see which validators are online with the new binary, use GitHub - blockpane/pvtop: top-like tui for watching validator pre-votes on Tendermint chains


The promise of Paloma GRAIN token available on all chains for relay payments means that Validators and Paloma GRAIN holders can convert GRAINs into useful work on any target chain. Also, the Paloma Gravity bridge allows users to convert their bots into tokens that they are able to market. This important upgrade will allow validators to enjoy the next step to monetizing their datacenters.

About Paloma

Paloma Protocol is a Cosmos-SDK blockchain protocol custom-built for omnichain communication that allows permissionless controls of any contract on any chain. Built by Volume, Paloma delivers the world’s first intelligently scheduled and automated smart contract transaction execution for the Cosmos ecosystem. The protocol enables developers to remotely control the transmission of value without the need to wrap, bridge tokens, or trust validators with their digital assets.

To learn more about Paloma, please visit https://palomachain.com

To follow the project on Github, please star the project GitHub - palomachain/paloma: The fast blockchain messenger protocol

To participate in the community, please join the Paloma Discord: Paloma

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