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ICQ is an abbreviation for Interchain Queries which allow smart contract to make queries to a remote chain. An ICQ Relayer is a required component for making them possible. It acts as a facilitator between the Neutron chain and a querying chain, gathering queries that are needed to be performed from the Neutron, actually performing them, and eventually making the results available for the Neutron’s smart contracts. Read full ICQ relayer documentation here

Install requirements

Essentials

Install make, gcc and git

sudo apt update
sudo apt install -y make gcc git build-essential

Golang

Install go by following the official docs. Remember to set your $PATH environment variable, for example:

cd $HOME
wget -O go1.21.8.linux-amd64.tar.gz https://go.dev/dl/go1.21.8.linux-amd64.tar.gz
rm -rf /usr/local/go && tar -C /usr/local -xzf go1.21.8.linux-amd64.tar.gz && rm go1.21.8.linux-amd64.tar.gz
echo 'export GOROOT=/usr/local/go' >> $HOME/.bashrc
echo 'export GOPATH=$HOME/go' >> $HOME/.bashrc
echo 'export GO111MODULE=on' >> $HOME/.bashrc
echo 'export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin' >> $HOME/.bashrc && . $HOME/.bashrc
go version

Docker

If you have any problem with installing docker, please check out docker official documentation.

sudo apt update
sudo apt-get install ca-certificates curl
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
 
# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
 
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
sudo docker run hello-world

Build docker image

By default Relayer handles all queries in a smart contract. That’s not LSD project party intent as the more queries relayer handles to more gas fee they pay. StaFi protocol extend the relayer to specify which query ids they would like to relay. So that they just pay gas fee for their pool query ids. This is a very useful feature, we have planed to submit changes to Neutron.

git clone https://github.com/stafiprotocol/neutron-query-relayer
cd neutron-query-relayer
make build-docker

Build `neutrond`

git clone -b v3.0.0 --depth=1 https://github.com/neutron-org/neutron.git
cd neutron
make install
neutrond version
3.0.0

Add account

Remember to transfer some neutron(NTRN) to the account generated or imported as it needs gas fee to relay transactions.

neutrond keys add icq-relayer \
  --keyring-dir=/home/neutron/keys --keyring-backend=test
 
- address: neutron1wdxufavkkr9x5a9fga5ur2p8em9r0mjjf6pnjy
  name: icq-relayer
  pubkey: '{"@type":"/cosmos.crypto.secp256k1.PubKey","key":"AzlrtWTpIynQ0/MxJjteC2LMuYlPEutNhPeHQ9KGjKcR"}'
  type: local
 
 
**Important** write this mnemonic phrase in a safe place.
It is the only way to recover your account if you ever forget your password.

Config parameters

Read full documentation of configuration

Additional environments provided by StaFi protocol:

RELAYER_REGISTRY_QUERY_IDS: A list of query ids separated by comma. Go Neutron Explorer to get pool query ids.

Key	type	description	Example
`RELAYER_REGISTRY_QUERY_IDS`	`string`	Query ids	91,92,93,94

cp .env.example .env-test
vim .env-test
 
## This is an example env configuration for running the relayer in Docker
 
RELAYER_NEUTRON_CHAIN_RPC_ADDR=https://rpc-falcron.pion-1.ntrn.tech:443
RELAYER_NEUTRON_CHAIN_REST_ADDR=https://rest-falcron.pion-1.ntrn.tech
RELAYER_NEUTRON_CHAIN_HOME_DIR=/keyring
RELAYER_NEUTRON_CHAIN_SIGN_KEY_NAME=icq-relayer
RELAYER_NEUTRON_CHAIN_TIMEOUT=10s
RELAYER_NEUTRON_CHAIN_GAS_PRICES=0.025untrn
RELAYER_NEUTRON_CHAIN_GAS_LIMIT=10000000
RELAYER_NEUTRON_CHAIN_GAS_ADJUSTMENT=2.0
RELAYER_NEUTRON_CHAIN_CONNECTION_ID=connection-175
RELAYER_NEUTRON_CHAIN_DEBUG=true
RELAYER_NEUTRON_CHAIN_KEYRING_BACKEND=test
RELAYER_NEUTRON_CHAIN_OUTPUT_FORMAT=json
RELAYER_NEUTRON_CHAIN_SIGN_MODE_STR=direct
 
RELAYER_TARGET_CHAIN_RPC_ADDR=https://test-cosmos-rpc1.stafihub.io:443
RELAYER_TARGET_CHAIN_ACCOUNT_PREFIX=cosmos
RELAYER_TARGET_CHAIN_VALIDATOR_ACCOUNT_PREFIX=cosmosvaloper
RELAYER_TARGET_CHAIN_TIMEOUT=10s
RELAYER_TARGET_CHAIN_DEBUG=true
RELAYER_TARGET_CHAIN_OUTPUT_FORMAT=json
 
RELAYER_REGISTRY_ADDRESSES=neutron1humx752uqvxn2jfenh5524md0ta23usm8m2lesaxw47fps28yx5syztnk5
RELAYER_REGISTRY_QUERY_IDS=91,92,93,94
 
RELAYER_ALLOW_TX_QUERIES=true
RELAYER_ALLOW_KV_CALLBACKS=true
RELAYER_MIN_KV_UPDATE_PERIOD=1
RELAYER_STORAGE_PATH=storage/leveldb
RELAYER_QUERIES_TASK_QUEUE_CAPACITY=10000
RELAYER_CHECK_SUBMITTED_TX_STATUS_DELAY=10s
RELAYER_INITIAL_TX_SEARCH_OFFSET=0
RELAYER_WEBSERVER_PORT=127.0.0.1:9999
RELAYER_IGNORE_ERRORS_REGEX=(execute wasm contract failed|failed to build tx query string)
 
#LOGGER_LEVEL=debug
#LOGGER_OUTPUTPATHS=stdout, /tmp/logs
#LOGGER_ERROROUTPUTPATHS=stderr

Run

docker run --env-file .env-test  -v /home/neutron/keys:/keyring -p 9999:9999 neutron-org/neutron-query-relayer

Deploy Cosmos LSD App