IBC-relayer-Task-for-Kichain

We are faced with the task of performing cross-chain transactions on the KiChain network. For this we need a Cosmos IBC relayer and a second network that supports IBC transactions. For example, I chose Crypto.org Croeseid Testnet.

---

1.Download and install the relayer:

git clone https://github.com/cosmos/relayer.git
cd relayer
make install
cd rly version version: 1.0.0-rc1–152-g112205b

2.Initialize the configuration of the relayer:

rly config init

3.Create network configuration files for the relayer

for Kichain network:

sudo nano kichain-t-4_config.json
{
"chain-id": "kichain-t-4",
"rpc-addr": "http://127.0.0.1:26657",
"account-prefix": "tki",
"gas": 20000,
"gas-prices": "0.025utki",
"trusting-period": "48h"
}

for Croeseid Testnet:

sudo nano testnet-croeseid-4_config.json
{
"chain-id": "testnet-croeseid-4",
"rpc-addr": "http://127.0.0.1:26652",
"account-prefix": "tcro",
"gas-adjustment": 1.5,
"gas-prices": "0.025basetcro",
"trusting-period": "48h"
}

4.Add the created files *.json to the relayer configuration:

rly chains add -f testnet-croeseid-4_config.json
rly chains add -f kichain-t-4_config.json

5. Create new wallets to interact with the relayer or restore existing ones in networks:

rly keys restore kichain-t-4 name of your wallet "mnemonic phrase from wallet"
rly keys add testnet-croeseid-4 name of your wallet

6. Add the newly created keys to the config of the relayer:

rly chains edit kichain-t-4 key name of your wallet
rly chains edit testnet-croeseid-4 key name of your wallet

7. Top up the wallets of the relayers - for Croeseid Testnet we use the faucet https://crypto.org/faucet

8. Checking the wallet balance of the relayers:

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

Example:
rly q bal testnet-croeseid-4
189282977basetcro
rly q bal kichain-t-4
1600673060utki

9. initialize the light clients on each network:

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

10. Let's check all the settings at this stage:

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

11. Create a tunnel between the two networks:

rly paths generate testnet-croeseid-4 kichain-t-3 transfer --port=transfer

12. Checking the created channel:

rly paths list -d
0: transfer -> chns(✔) clnts(✔) conn(✔) chan(✔) (testnet-croeseid-4:transfer<>kichain-t-4:transfer)
If you are lucky and you see this conclusion, then skip step 13
If your output looks something like this -
0: transfer -> chns(✔) clnts(x) conn(x) chan(x)
then we perform step 13

13. Trying to open channels relayers:

rly tx link transfer
Example:
★ Channel created: [testnet-croeseid-4]chan{channel-13}port{transfer} -> [kichain-t-4]chan{channel-37}port{transfer}

14. Try send tokens from Croeseid to KiChain and back:

rly tx transfer [src-chain-id] [dst-chain-id] [amount] [dst-addr] [flags]

rly tx transfer testnet-croeseid-4 kichain-t-4 10000basetcro tki1neuk5fhrv95wx8lld8lpf0cunxjukl59q2y3kt --path transfer -d
hash(135E8770D3F54B6ADBB7E8153D96769EBE4851B68805CA5EC445BAFA6189E509)
https://crypto.org/explorer/croeseid4/tx/135E8770D3F54B6ADBB7E8153D96769EBE4851B68805CA5EC445BAFA6189E509

rly tx transfer kichain-t-4 testnet-croeseid-4 100000utki tcro1fes4lqj23vnrkqqu6jc0qu3ujr7unc39l4x6vu --path transfer -d
hash(712064649D270627FF7EFC2A9E3F856792C56B5647F05AC4C8A268CF07BFF680)
https://ki.thecodes.dev/tx/712064649D270627FF7EFC2A9E3F856792C56B5647F05AC4C8A268CF07BFF680

15. To maintain the operation of the relayer, we will create a service file:

sudo tee /etc/systemd/system/rlyd.service > /dev/null <<EOF
[Unit]
Description=relayer client
After=network-online.target, KiChain.service
[Service]
User=$USER
ExecStart=$(which rly) start transfer
Restart=always
RestartSec=3
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF

16. We start the service file

sudo systemctl daemon-reload
sudo systemctl enable rlyd
sudo systemctl start rlyd

17. To check the logs of the relay, use:

journalctl -u rlyd -f