# Croeseid Testnet: Running Nodes

The latest Crypto.org Chain Testnet has been named as Croeseid.

This is a detailed documentation for setting up a Validator or a full node on Crypto.org Croeseid testnet testnet-croeseid-4.

# Pre-requisites

# Supported OS

We officially support macOS, Windows and Linux only. Other platforms may work but there is no guarantee. We will extend our support to other platforms after we have stabilized our current architecture.

# Prepare your machine

  • To run Crypto.org Chain nodes in the testnet, you will need a machine with the following minimum requirements:

    • Dual-core, x86_64 architecture processor;
    • 4 GB RAM;
    • 100 GB of storage space.

# Step 1. Get the Crypto.org Chain testnet binary

Remarks:

The following is the minimal setup for a validator node.

Reminder:

The binary for testnet and the binary for mainnet are two different binaries. Please make sure you are using the correct binary.

To simplify the following step, we will be using Linux (Intel x86) for illustration. Binary for Mac (Intel x86 / M1)and Windows are also available.

  • To install Crypto.org Chain released testnet binaries from github:

    $ curl -LOJ https://github.com/crypto-org-chain/chain-main/releases/download/v3.0.0-croeseid/chain-main_3.0.0-croeseid_Linux_x86_64.tar.gz
    $ tar -zxvf chain-main_3.0.0-croeseid_Linux_x86_64.tar.gz
    
  • You can verify the installation by checking the version of the chain-maind, the current version is 3.0.0-croeseid.

    $./chain-maind version
    3.0.0-croeseid
    

# Step 2. Configure chain-maind

Before kick-starting your node, we will have to configure your node so that it connects to the Croeseid testnet:

# Step 2-0 (Optional) Clean up the old blockchain data

  • If you have joined testnet-croeseid-3 before, you would have to clean up the old blockchain data and start over again, it can be done by running:

    $ ./chain-maind unsafe-reset-all
    

    and remove the old genesis file by

    $ rm ~/.chain-maind/config/genesis.json
    
  • You cannnot override the previous validator through chain-maind init. If you want to have a new validator, you need to manually remove the priv_validator_key.json:

    rm ~/.chain-maind/config/priv_validator_key.json
    

    Then, in Step 2-1, chain-maind init should help you to generate a new validator key file.

# Step 2-1 Initialize chain-maind

  • First of all, you can initialize chain-maind by:

      $ ./chain-maind init [moniker] --chain-id testnet-croeseid-4
    

    This moniker will be the displayed id of your node when connected to Crypto.org Chain network. When providing the moniker value, make sure you drop the square brackets since they are not needed. The example below shows how to initialize a node named pegasus-node :

      $ ./chain-maind init pegasus-node --chain-id testnet-croeseid-4
    

    NOTE

    • Depending on your chain-maind home setting, the chain-maind configuration will be initialized to that home directory. To simply the following steps, we will use the default chain-maind home directory ~/.chain-maind/ for illustration.
    • You can also put the chain-maind to your binary path and run it by chain-maind

# Step 2-2 Configure chain-maind

  • Download and replace the Croeseid Testnet genesis.json by:

    $ curl https://raw.githubusercontent.com/crypto-com/testnets/main/testnet-croeseid-4/genesis.json > ~/.chain-maind/config/genesis.json
    
  • Verify sha256sum checksum of the downloaded genesis.json. You should see OK! if the sha256sum checksum matches.

    $ if [[ $(sha256sum ~/.chain-maind/config/genesis.json | awk '{print $1}') = "24eeb466be03f14f589adbd262d85ab818413740a3d0198007a25cf7028e92fc" ]]; then echo "OK"; else echo "MISMATCHED"; fi;
    
    OK!
    

    NOTE

    • For Mac environment, sha256sum was not installed by default. In this case, you may setup sha256sum with this command:

      function sha256sum() { shasum -a 256 "[email protected]" ; } && export -f sha256sum
      
  • In ~/.chain-maind/config/app.toml, update minimum gas price to avoid transaction spamming

    $ sed -i.bak -E 's#^(minimum-gas-prices[[:space:]]+=[[:space:]]+)""$#\1"0.025basetcro"#' ~/.chain-maind/config/app.toml
    
  • For network configuration, in ~/.chain-maind/config/config.toml, please modify the configurations of persistent_peers, create_empty_blocks_interval and timeout_commit by:

    $ sed -i.bak -E 's#^(persistent_peers[[:space:]]+=[[:space:]]+).*$#\1"[email protected]:26656,[email protected]:26656"#' ~/.chain-maind/config/config.toml
    $ sed -i.bak -E 's#^(create_empty_blocks_interval[[:space:]]+=[[:space:]]+).*$#\1"5s"#' ~/.chain-maind/config/config.toml
    $ sed -i.bak -E 's#^(timeout_commit[[:space:]]+=[[:space:]]+).*$#\1"2s"#' ~/.chain-maind/config/config.toml  
    

Note: We suggest using persistent_peers instead of seeds to provide stable state-sync experience.

# Step 2-3 Enable STATE-SYNC

STATE-SYNC is supported in our testnet! 🎉

With state sync your node will download data related to the head or near the head of the chain and verify the data. This leads to drastically shorter times for joining a network for validator.

However, you should keep in mind that the block before state-sync trust height will not be queryable. So if you want to run a full node, better not use state-sync feature to ensure your node has every data on the blockchain network.

For validator, it will be amazingly fast to sync the near head of the chain and join the network.

Follow the below optional steps to enable state-sync.

  • For state-sync configuration, in ~/.chain-maind/config/config.toml, please modify the configurations of [statesync] enable, rpc_servers, trust_height and trust_hash by:

    
    $ LATEST_HEIGHT=$(curl -s https://testnet-croeseid-4.crypto.org:26657/block | jq -r .result.block.header.height); \
    BLOCK_HEIGHT=$((LATEST_HEIGHT - 1000)); \
    TRUST_HASH=$(curl -s "https://testnet-croeseid-4.crypto.org:26657/block?height=$BLOCK_HEIGHT" | jq -r .result.block_id.hash)
    
    $ sed -i.bak -E "s|^(enable[[:space:]]+=[[:space:]]+).*$|\1true| ; \
    s|^(rpc_servers[[:space:]]+=[[:space:]]+).*$|\1\"https://testnet-croeseid-4.crypto.org:26657,https://testnet-croeseid-4.crypto.org:26657\"| ; \
    s|^(trust_height[[:space:]]+=[[:space:]]+).*$|\1$BLOCK_HEIGHT| ; \
    s|^(trust_hash[[:space:]]+=[[:space:]]+).*$|\1\"$TRUST_HASH\"| ; \
    s|^(seeds[[:space:]]+=[[:space:]]+).*$|\1\"\"|" ~/.chain-maind/config/config.toml
    

    NOTE

    • For Mac environment, if jq is missing, you may install it by: brew install jq

# Step 3. Run everything

CAUTION

This page only shows the minimal setup for validator node.

Furthermore, you may want to run full nodes as sentries (see Tendermint), restrict your validator connections to only connect to your full nodes, test secure storage of validator keys etc.

# Step 3-1. Create a new key and address

Run the followings to create a new key. For example, you can create a key with the name Default by:

  $ ./chain-maind keys add Default

You should obtain an address with tcro prefix, e.g. tcro1quw5r22pxy8znjtdkgqc65atrm3x5hg6vycm5n. This will be the address for performing transactions.

# Step 3-2. Obtain test token

Unless you have obtained the CRO testnet token before, use the tcro faucet to obtain test CRO tokens. In case you have reached the daily limit on faucet airdrop, you can simply send a message on Discord #request-tcro channel , stating who you are and your tcro..... address.

# Step 3-3. Obtain the validator public key

You can obtain your validator public key by:

  $ ./chain-maind tendermint show-validator

The public key should in a json format, for example:

{
  "@type": "/cosmos.crypto.ed25519.PubKey",
  "key": "[The_validator_key]"
}

# Step 3-4. Run everything

Once the chain-maind has been configured, we are ready to start the node and sync the blockchain data:

  • Start chain-maind, e.g.:
  $ ./chain-maind start

Remarks:

If you see errors saying too many files opened..., then you need to set a higher number for maximum open file descriptors in your OS.

If you are on OSX or Linux, then the following could be useful:

# Check current max fd
$ ulimit -n
# Set a new max fd
$ ulimit -Sn [NEW_MAX_FILE_DESCRIPTOR]
# Example
$ ulimit -Sn 4096 
  • (Optional for Linux) Start chain-maind with systemd service, e.g.:
  $ git clone https://github.com/crypto-org-chain/chain-main.git && cd chain-main
  $ ./networks/create-service.sh
  $ sudo systemctl start chain-maind
  # view log
  $ journalctl -u chain-maind -f
Example: /etc/systemd/system/chain-maind.service created by script
# /etc/systemd/system/chain-maind.service
[Unit]
Description=Chain-maind
ConditionPathExists=/usr/local/bin/chain-maind
After=network.target

[Service]
Type=simple
User=ubuntu
WorkingDirectory=/usr/local/bin
ExecStart=/usr/local/bin/chain-maind start --home /home/ubuntu/.chain-maind
Restart=on-failure
RestartSec=10
LimitNOFILE=4096

[Install]
WantedBy=multi-user.target

It should begin fetching blocks from the other peers. Please wait until it is fully synced before moving onto the next step.

  • You can query the node syncing status by

    $ ./chain-maind status 2>&1 | jq '.SyncInfo.catching_up'
    

    If the above command returns false, It means that your node is fully synced; otherwise, it returns true and implies your node is still catching up.

  • One can check the current block height by querying the public full node by:

    curl -s https://testnet-croeseid-4.crypto.org:26657/commit | jq "{height: .result.signed_header.header.height}"
    

    and you can check your node's progress (in terms of block height) by

    $ ./chain-maind status 2>&1 | jq '.SyncInfo.latest_block_height'
    

# Step 3-5. Send a create-validator transaction

Once the node is fully synced, we are now ready to send a create-validator transaction and join the network, for example:

$ ./chain-maind tx staking create-validator \
--from=[name_of_your_key] \
--amount=500000tcro \
--pubkey='{"@type":"/cosmos.crypto.ed25519.PubKey","key":"PUBLIC_KEY"}'  \
--security-contact="[security contact email/contact method]" \
--chain-id="testnet-croeseid-4" \
--commission-rate="0.10" \
--commission-max-rate="0.20" \
--commission-max-change-rate="0.01" \
--min-self-delegation="1" \
--gas 80000000 \
--gas-prices 0.1basetcro

{"body":{"messages":[{"@type":"/cosmos.staking.v1beta1.MsgCreateValidator"...}
confirm transaction before signing and broadcasting [y/N]: y

You will be required to insert the following:

  • --from: The trco... address that holds your funds;
  • --pubkey: The validator public key( See Step 3-3 above );
  • --moniker: A moniker (name) for your validator node;
  • --security-contact: Security contact email/contact method.

# Step 3-6. Check your validator status

Once the create-validator transaction completes, you can check if your validator has been added to the validator set:

$ ./chain-maind tendermint show-address
## [tcrocnclcons... address] ##
$ ./chain-maind query tendermint-validator-set | grep -c [tcrocnclcons...]
## 1 = Yes; 0 = Not yet added ##

To further check if the validator is signing blocks, kindly run this script, for example:

$ curl -sSL https://raw.githubusercontent.com/crypto-com/chain-docs/master/docs/getting-started/assets/signature_checking/check-validator-up.sh | bash -s -- \
--tendermint-url https://testnet-croeseid-4.crypto.org:26657 \
--pubkey $(cat ~/.chain-maind/config/priv_validator_key.json | jq -r '.pub_key.value')

The validator is in the active validator set under the address  <YOUR_VALIDATOR_ADDRESS>
The validator is signing @ Block#<BLOCK_HEIGHT> 👍
$ curl -sSL https://raw.githubusercontent.com/crypto-com/chain-docs/master/docs/getting-started/assets/signature_checking/check-validator-up.sh | bash -s -- \
--tendermint-url https://testnet-croeseid-4.crypto.org:26657 \
--bechpubkey [tcrocnclconspub1....]

The validator is in the active validator set under the address  <YOUR_VALIDATOR_ADDRESS>
The validator is signing @ Block#<BLOCK_HEIGHT> 👍

Alternatively, you can run it on this browser based IDE, by specifying your validator public key in the "YOUR_PUBKEY" field, where this key can be obtained by running

$ cat ~/.chain-maind/config/priv_validator_key.json | jq -r '.pub_key.value'

# Step 4. Perform Transactions

# Step 4-1. query bank balances - Check your transferable balance

You can check your transferable balance with the balances command under the bank module.

Example: Check your address balance
$ ./chain-maind query bank balances tcro1quw5r22pxy8znjtdkgqc65atrm3x5hg6vycm5n

balances:
- amount: "10005471622381693"
  denom: basetcro
pagination:
  next_key: null
  total: "0"

# Step 4-2. tx bank send - Transfer operation

Transfer operation involves the transfer of tokens between two addresses.

# Send Funds [tx bank send <from_key_or_address> <to_address> <amount> <network_id>]

Example: Send 10tcro from an address to another.
$ ./chain-maind tx bank send Default tcro1j7pej8kplem4wt50p4hfvndhuw5jprxxn5625q 10tcro --chain-id "testnet-croeseid-4" --gas-prices 0.1basetcro
  ## Transaction payload##
  {"body":{"messages":[{"@type":"/cosmos.bank.v1beta1.MsgSend","from_address"....}
confirm transaction before signing and broadcasting [y/N]: y

# Step 4-3. tx staking - Staking operations

NOTE

  • To get the 'validator-addr' with bech32 prefix, you can run with this command:

    ./chain-maind keys show Default --bech val
    

Staking operations involve the interaction between an address and a validator. It allows you to create a validator and lock/unlocking funds for staking purposes.

# Delegate you funds to a validator [tx staking delegate <validator-addr> <amount>]

To bond funds for staking, you can delegate funds to a validator by the delegate command

Example: Delegate funds from `Default` to a validator under the address `tcrocncl16k...edcer`
$ ./chain-maind tx staking delegate tcrocncl16kqr009ptgken6qsxnzfnyjfsq6q97g3uedcer 100tcro --from Default --chain-id "testnet-croeseid-4" --gas-prices 0.1basetcro
## Transactions payload##
{"body":{"messages":[{"@type":"/cosmos.staking.v1beta1.MsgDelegate"....}
confirm transaction before signing and broadcasting [y/N]: y

# Unbond your delegated funds [tx staking unbond <validator-addr> <amount>]

On the other hand, we can create a Unbond transaction to unbond the delegated funds

Example: Unbond funds from a validator under the address `tcrocncl16k...edcer`
$ ./chain-maind tx staking unbond tcrocncl16kqr009ptgken6qsxnzfnyjfsq6q97g3uedcer 100tcro --from Default --chain-id "testnet-croeseid-4" --gas-prices 0.1basetcro
## Transaction payload##
{"body":{"messages":[{"@type":"/cosmos.staking.v1beta1.MsgUndelegate"...}
confirm transaction before signing and broadcasting [y/N]: y

TIP

  • Once your funds were unbonded, It will be locked until the unbonding_time has passed.

After you have delegated or create a validator, reward will be accumulated, you can check/ withdraw it by:

# query distribution validator-outstanding-rewards - Query un-withdrawn rewards for a validator

We can check distribution outstanding (un-withdrawn) rewards for a validator and all of their delegations by its operator address.

Example: Check all outstanding rewards under the operator address `tcrocncl1...zrf8`
$ ./chain-maind q distribution validator-outstanding-rewards tcrocncl1kkqxv3szgh099xezt7y38t5anqzue4s326zrf8
  rewards:
  - amount: "1920761912.927067330419141688"
    denom: basetcro

# tx distribution validator-outstanding-rewards - Query un-withdrawn rewards for a validator

We can check distribution outstanding (un-withdrawn) rewards for a validator and all of their delegations by its operator address.

Example: Withdraw all outstanding under a delegation address:
$ ./chain-maind tx distribution withdraw-all-rewards --from [key_name] --chain-id "testnet-croeseid-4" --gas-prices 0.1basetcro

{"body":{"messages":[{"@type":"/cosmos.distribution.v1beta1.MsgWithdrawDelegatorReward"...}]}
confirm transaction before signing and broadcasting [y/N]: y

# tx slashing unjail - Unjail a validator

Validator could be punished and jailed due to network misbehaviour, we can check the jailing status of a validator, for example:

$ ./chain-maind query staking validators -o json | jq
................................
      "operator_address": "tcrocncl1hct8ye56gk80qjxvrx299yu9v98aqaxe0y5kvg",
      "consensus_pubkey": {
        "@type": "/cosmos.crypto.ed25519.PubKey",
        "key": "P1/aHuScW5myVs+xH10R8yFT2u0wwaCKXfDKSuVTl60="
      },
      "jailed": true,
................................

Where "jailed": true implies that the validator has been jailed. After the jailing period has passed, one can broadcast a unjail transaction to unjail the validator and resume its normal operations by

$ ./chain-maind tx slashing unjail --from [key_name] --chain-id "testnet-croeseid-4" --gas-prices 0.1basetcro

  {"body":{"messages":[{"@type":"/cosmos.slashing.v1beta1.MsgUnjail"...}]}
  confirm transaction before signing and broadcasting [y/N]: y

:::

Congratulations! You've successfully set up a Testnet node and performed some basic transactions! You may refer to Wallet Management for more advanced operations and transactions.

# Croeseid testnet faucet and explorer

  • You can lookup data within the testnet-croeseid-4 network by the explorer;

  • To interact with the blockchain, simply use the test-token faucet to obtain test CRO tokens for performing transactions on the Croeseid testnet.

    • Note that you will need to create an address before using the faucet.