Introdution

For make cross-chain transactions you need:

1. Installed KiChain node (kichain-t-4)
2. Installed another Cosmos node with IBC (the following is Croeseid 3.1.0)
3. Cosmos IBC relayer

Relayer installation and configuration

Install relayer v1.0.0

git clone https://github.com/cosmos/relayer.git
cd relayer
make install
cd

Initialize the relayer config

rly config init

Create KiChain config file

echo '{"chain-id":"kichain-t-4","rpc-addr":"https://rpc-challenge.blockchain.ki:443","account-prefix":"tki","gas-adjustment":1.5,"gas-prices":"0.025utki","trusting-period":"10m"}' > $HOME/.relayer/config/kichain_config.json

Create Cro config file

echo '{"chain-id":"testnet-croeseid-4","rpc-addr":"'`grep -oPm1 "(?<=^laddr = \")([^%]+)(?=\")" "$HOME/.chain-maind/config/config.toml"`'","account-prefix":"tcro","gas-adjustment":1.5,"gas-prices":"0.025basetcro","trusting-period":"10m"}'  > $HOME/.relayer/config/croeseid_config.json

Add chain configs from JSONs

rly chains add -f $HOME/.relayer/config/kichain_config.json
rly chains add -f $HOME/.relayer/config/croeseid_config.json

Create relayer wallets

rly keys add kichain-t-4 kichain_wallet > $HOME/rly_kichain_wallet.txt
rly keys add testnet-croeseid-4 cro_wallet > $HOME/rly_croeseid_wallet.txt

Save this files

echo $HOME/rly_kichain_wallet.txt
echo $HOME/rly_croeseid_wallet.txt

Link wallets to networks

rly chains edit kichain-t-4 key kichain_wallet
rly chains edit testnet-croeseid-4 key cro_wallet

Send tokens to Kichain and Cro wallets and check balances after that

rly query balance kichain-t-4
rly query balance testnet-croeseid-4

Initialize light clients

rly light init kichain-t-4 -f
rly light init testnet-croeseid-4 -f

Then generate paths

rly paths generate kichain-t-4 testnet-croeseid-4 kichain --port=transfer
rly paths generate testnet-croeseid-4 kichain-t-4 cro --port=transfer

Check correct configuration

rly chains list

Output

0: kichain-t-4          -> key(✔) bal(✔) light(✔) path(✔)
1: testnet-croeseid-4   -> key(✔) bal(✔) light(✔) path(✔)

Open channels (wait for Channel created)

rly tx link kichain
rly tx link cro

Cross-chain transaction sending

Send 1tki to Cro

rly tx transfer kichain-t-4 testnet-croeseid-4 1000000utki `rly keys show testnet-croeseid-4 cro_wallet` --path kichain

Send 1tcro to KiChain

rly tx transfer testnet-croeseid-4 kichain-t-4 1000000basetcro `rly keys show kichain-t-4 kichain_wallet` --path cro

Example of successful output

I[2021-09-12|23:44:57.052] ✔ [kichain-t-4]@{303033} - msg(0:transfer) hash(A7150C2D83EFF3B50CBAB6872B351213410B56C26E32128433B667865712EBD1)

You can check transaction in KiChain or Cro explorer

https://ki.thecodes.dev/tx/REPLACE_IT_TO_HASH

https://crypto.org/explorer/croeseid4/tx/REPLACE_IT_TO_HASH