docs: testnet 5 documentation for Babylon validators

bbn-test-5/babylon-validators/README.md

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+# Babylon Validator Setup
+
+## Table of Contents
+
+1. [System Requirements](#system-requirements)
+2. [Install Babylon Binary](#install-babylon-binary)
+3. [Setup Node Home Directory and Configure](#setup-your-node-home-directory-and-configure)
+4. [Setup Required Keys](#setup-the-required-keys-for-operating-a-validator)
+5. [Sync Node](#sync-node)
+6. [Get Funds](#get-funds)
+7. [Create Validator](#create-validator)
+
+## System Requirements
+
+The Babylon node is built using the Cosmos SDK and has similar system requirements with typical Cosmos SDK ecosystem nodes.
+
+As a reference, the following system specification is typically used by validators and found to be comfortable for high up-time operations.
+
+- Quad Core or larger AMD or Intel (amd64) CPU
+- 32GB RAM
+- 1TB NVMe Storage
+- 100MBps bidirectional internet connection
+
+Note: the above is a sample system specification that might not fit your specific infrastructure. Please do your own research before committing to a
+setup and verifying that it can scale well depending on your operations and needs.
+
+## Install Babylon Binary 
+<!-- TODO: check add in the correct tag for the testnet -->
+Download [Golang 1.21](https://go.dev/dl) 
+
+Using the go version 1.21.x (where x is any patch version like 1.21.0, 1.21.1, etc.)
+Once installed run: 
+
+```shell
+go version
+```
+
+To ensure you are using the correct version, the terminal should return something similar to the below.
+
+```shell
+go: downloading go1.21 (darwin/arm64)
+```
+
+Subsequently clone the babylon [repository](https://github.com/babylonlabs-io/babylon).
+
+```shell
+git clone [email protected]:babylonlabs-io/babylon.git
+```
+
+Once the `babylon` repository is downloaded then checkout the corresponding tag for `bbn-testnet-5`.
+
+``` shell
+git checkout <tag>
+```
+
+You should now have the repository on your machine. Next navigate into the repository you just cloned and run the following:
+
+```shell
+make install
+```
+
+This command does the following:
+- Builds the daemon
+- Compile all Go packages in the project
+- Installs the binary 
+- Makes the `babylond` command globally accessible from your terminal
+
+And should return something such as below:
+
+```shell
+go install -mod=readonly -tags "netgo ledger mainnet" -ldflags '-X github.com/cosmos/cosmos-sdk/version.Name=babylon -X github.com/cosmos/cosmos-sdk/version.AppName=babylond -X github.com/cosmos/cosmos-sdk/version.Version=v0.13.0 -X github.com/cosmos/cosmos-sdk/version.Commit=976e94b926dcf287cb487e8f35dbf400c7d930cc -X "github.com/cosmos/cosmos-sdk/version.BuildTags=netgo,ledger" -w -s' -trimpath  ./...
+```
+
+Now it has successfully compiled, lets check the available actions.
+
+```shell
+babylond
+```
+
+Which will give us a list of available actions.
+
+```shell
+Available Commands:
+  add-genesis-account Add a genesis account to genesis.json
+  collect-gentxs      Collect genesis txs and output a genesis.json file
+  comet               CometBFT subcommands
+  config              Utilities for managing application configuration
+  ...
+```
+
+If this isn't working then it might not have saved successfully in your `gopath`
+
+If it hasn't saved successfully in your gopath then it might have saved in the `./build` directory, so instead use the following from the project root directory.
+
+```shell
+./build/babylond
+```
+## Setup your node, home directory and configure 
+
+Next we initialize the node and home directory. It should generate all of the necessary files such as `app.toml`, `client.toml`, `genesis.json` with the below command.
+
+```shell
+babylond init <moniker> --chain-id bbn-test-5 --home=./nodeDir
+```
+
+The `<moniker>` is a unique identifier for your node. So for example `node0`.
+
+  Next we should navigate to `app.toml`, update the following section:
+
+```shell
+Base configuration
+iavl-cache-size = 0
+
+[btc-config]
+
+# Configures which bitcoin network should be used for checkpointing
+# valid values are: [mainnet, testnet, simnet, signet, regtest]
+network = "signet"
+```
+
+In `app.toml` under `[btc-network]`change network to `signet` and `iavl-cache-size = 0` instead of what is listed in the automatically generated template.
+
+Navigate to `config.toml`. Add in your seed that should look something like this `[email protected]:26656`
+
+```shell
+ P2P Configuration Options    
+
+# Comma separated list of seed nodes to connect to
+seeds = "[email protected]:26656"
+
+# Comma separated list of nodes to keep persistent connections to
+persistent_peers = "[email protected]:26656"
+```
+
+In the `config.toml` add in the `seeds` and `persistent-peers` token (this can be the same token).
+
+We next want to add in the `genesis.json` file. To do this, either copy the genesis file from `https://rpc.devnet.babylonlabs.io/genesis` or we can use the terminal with the following command.
+
+```
+wget https://github.com/babylonlabs-io/networks/raw/main/bbn-test-5/genesis.tar.bz2
+tar -xjf genesis.tar.bz2 && rm genesis.tar.bz2
+mv genesis.json ~/.babylond/config/genesis.json
+```
+
+This file needs to overwrite the existing genesis file in the `~/.babylond/config/genesis.json` and please ensure that the `chain-id` is correct. The chain id is what you used in the `babylond init` command above.
+## Setup the required keys for operating a validator 
+
+### Keys for a CometBFT validator
+
+Setting up the key is crucial as it serves as the validator's identity. The key-pair will be used for signing blocks, participating in consensus and managing validator operations. To add a key run the following command:
+
+```shell
+babylond --keyring-backend test keys add <name> --home=./nodeDir
+```
+
+We use `--keyring-backend test`, which specifies which backend to use for the keyring, `test` stores keys unencrypted on disk. The `<name>` specifies a unique identifier for the key.
+
+The execution result displays the address of the newly generated key and its public key. Following is a sample output for the command:
+
+```shell
+- address: bbn1kvajzzn6gtfn2x6ujfvd6q54etzxnqg7pkylk9
+
+name: test-val
+
+pubkey: '{"@type":"/cosmos.crypto.secp256k1.PubKey","key":"Ayau+8f945c1iQp9tfTVaCT5lzhD8n4MRkZNqpoL6Tpo"}'
+
+type: local
+```
+### Keys for a BLS Voting
+#### What is BLS Voting
+
+BLS (Boneh-Lynn-Shacham) voting is used to create compact checkpoints at the end of each epoch. An epoch is a fixed period within the blockchain, defined or set by a number of blocks, during which a validator set remains consistent. This stability allows Babylon to create and submit checkpoints only once per epoch, reducing the overhead of interacting with the Bitcoin blockchain.
+
+To read more on BLS Voting please see [here](#)
+#### Create BLS Key
+
+Validators are expected to submit a BLS signature at the end of each epoch. To do that, a validator needs to have a BLS key pair to sign information with.
+
+Using your address from the keyring generation run:
+
+```shell
+babylond create-bls-key <address>
+```
+
+Your address should be the one that was generated in the keyring generation step and looks something like this: `bbn1kvajzzn6gtfn2x6ujfvd6q54etzxnqg7pkylk9`.
+
+This command will create a BLS key and add it to the `~/.babylond/config/priv_validator_key.json` that was generated when `init` was run.
+
+## Sync Node
+
+We are now ready to sync the node.
+
+```shell
+babylond start --chain-id=bbn-test-5 --home=./nodeDir --minimum-gas-prices=0.005ubbn
+```
+
+Lets go through the flags of the above command:
+
+- `start`: This is the command to start the Babylon node.
+- `--chain-id bbn-test-5`: Specifies the ID of the blockchain network you're connecting to.
+- `--home=./nodeDir`: Sets the directory for the node's data and configuration files and is dependant on where the files were generated for you from the initialization. In this case, it's using a directory named "nodeDir" in the current path.
+- `--minimum-gas-prices=0.005ubbn`: This flag sets the minimum gas price for transactions the node will accept. This can also be manually set in the `app.toml`
+#### Connect to Nodes
+
+To connect your node to the network, you'll need peer addresses.
+<!-- insert links when we have them -->
+
+As mentioned in the configuration step, add these to your `config.toml` under `persistent_peers` or `seeds`.
+#### Use a Snapshot
+
+For faster syncing, you can use a snapshot instead of syncing from genesis. Snapshots are 
+periodic backups of the chain state. Find them at:
+<!-- - add link here -->
+
+Note: Always verify snapshot sources and checksums before using them to ensure security.
+
+## Get Funds
+<!-- This needs to be updated to the correct testnet and potentially need help with the correct instructions as I cant access the faucet -->
+
+Request Funds from the Babylon Testnet Faucet​ [here](https://faucet.devnet.babylonlabs.io/)
+
+## Create Validator
+
+Contrary to a vanilla Cosmos SDK chain, a validator for Babylon is created through the `babylond tx checkpointing create-validator` command. This command expects that a BLS validator key exists under the `~/.babylond/config/priv_validator_key.json`.
+
+To create the validator (using sample parameters):
+
+```
+babylond tx checkpointing create-validator ./dir/node0/babylond/config/priv_validator_key.json\
+--chain-id="devnet-2" \
+--gas="auto" \
+--gas-adjustment="1.5" \
+--gas-prices="0.025ubbn" \
+--from=bbn12k7w0mtdqp5yff8hr9gj6xe3uq7hnfhgpzwa7f
+```
+
+This should return a transaction, which contains your validator address as below:
+
+```
+bbnvaloper12k7w0mtdqp5yff8hr9gj6xe3uq7hnfhguqyqjg`
+```
+### Verify your Validator
+
+To verify your validator, run:
+
+```
+babylond keys show <address or name> -a --bech val
+```
+
+Should return your validator address `bbnvaloper12k7w0mtdqp5yff8hr9gj6xe3uq7hnfhguqyqjg` which was returned during the `create-validator` action.
+
+Next, lets check what is listed under the staking validator. Here we use the validator address we received in the response in the last command.
+
+Here we run:
+
+```
+babylond query staking validator <validator address>
+```
+
+And should receive a response that corresponds to the params from your`create-validator` transaction.
+
+```
+validator:
+commission:
+commission_rates:
+max_change_rate: "10000000000000000"
+max_rate: "1000000000000000000"
+rate: "100000000000000000"
+update_time: "2024-10-23T12:21:59.581302666Z"
+consensus_pubkey:
+type: tendermint/PubKeyEd25519
+value: jKjSVn02f8XbnJe4KWxwOWCGGmvyz++3g+8Ppfmbwfw=
+delegator_shares: "100000000000000000000"
+description:
+details: node0val
+moniker: node0
+security_contact: [email protected]
+website: https://myweb.site
+min_self_delegation: "1"
+operator_address: bbnvaloper12k7w0mtdqp5yff8hr9gj6xe3uq7hnfhguqyqjg
+status: 1
+tokens: "100"
+unbonding_time: "1970-01-01T00:00:00Z"
+```
+
+After the epoch (a period of time in which the chain divides time into different periods to help coordinate a number of network-wide activities) ends and if you have enough stake to be an active validator, performing this query will return you a status `BOND_STATUS_BONDED`. 
+
+Congrats! You are now a validator on the Babylon system.
+
+If you want to `delegate`, `redelegate`, `unbond` or `cancel-unbond`, please use the wrapped messages in the checkpointing and epoching modules as the messages in staking module are disabled. Read more [here](https://docs.babylonlabs.io/docs/developer-guides/modules/epoching#delaying-wrapped-messages-to-the-end-of-epochs)