Introduce delegate-stake.sh for adding stake to a validator.sh (#5380)

book/src/testnet-participation.md

@@ -222,7 +222,6 @@ $ solana-keygen pubkey ~/.local/share/solana/install/active_release/config/valid
 $ solana-keygen pubkey ./config/validator-vote-keypair.json
 ```
 
-
 #### Validator Metrics
 Metrics are available for local monitoring of your validator.
 
@@ -282,3 +281,33 @@ Keybase:
   `https://keybase.pub/<KEYBASE_USERNAME>/solana/validator-<PUBKEY>`
 3. Add or update your `solana-validator-info` with your Keybase username. The
 CLI will verify the `validator-<PUBKEY>` file
+
+### Staking
+When your validator starts it will have no stake, which means it will ineligible to become leader.
+
+Adding stake can be accomplished by using the `solana-wallet` command.  First
+obtain the public key for your validator's vote account with:
+```bash
+$ solana-keygen pubkey ~/validator-config/vote-keypair.json
+```
+This will output a base58-encoded value that looks similar to
+`DhUYZR98qFLLrnHg2HWeGhBQJ9tru7nwdEfYm8L8HdR9`. Then create a stake account
+keypair with `solana-keygen`:
+```bash
+$ solana-keygen new -o ~/validator-config/stake-keypair.json
+```
+and use the wallet's `delegate-stake` command to stake your validator with 42 lamports:
+```bash
+$ solana-wallet delegate-stake ~/validator-config/stake-keypair.json [VOTE PUBKEY] 42
+```
+
+Note that stake changes are applied at Epoch boundaries so it can take an hour
+or more for the change to take effect.
+
+Stake can be deactivate by running:
+```bash
+$ solana-wallet deactivate-stake ~/validator-config/stake-keypair.json
+```
+Note that a stake account may only be used once, so after deactivation use the
+wallet's `withdraw-stake` command to recover the previously staked lamports.
+