Update output and associated documentation.

cmd/account/derive/output.go

@@ -42,11 +42,13 @@ func output(ctx context.Context, data *dataOut) (string, error) {
 	if data.showPrivateKey {
 		builder.WriteString(fmt.Sprintf("Private key: %#x\n", data.key.Marshal()))
 	}
-	builder.WriteString(fmt.Sprintf("Public key: %#x", data.key.PublicKey().Marshal()))
 	if data.showWithdrawalCredentials {
 		withdrawalCredentials := util.SHA256(data.key.PublicKey().Marshal())
 		withdrawalCredentials[0] = byte(0) // BLS_WITHDRAWAL_PREFIX
-		builder.WriteString(fmt.Sprintf("\nWithdrawal credentials: %#x", withdrawalCredentials))
+		builder.WriteString(fmt.Sprintf("Withdrawal credentials: %#x\n", withdrawalCredentials))
+	}
+	if !(data.showPrivateKey || data.showWithdrawalCredentials) {
+		builder.WriteString(fmt.Sprintf("Public key: %#x\n", data.key.PublicKey().Marshal()))
 	}
 
 	return builder.String(), nil

cmd/account/derive/run.go

@@ -15,6 +15,7 @@ package accountderive
 
 import (
 	"context"
+	"strings"
 
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
@@ -45,5 +46,5 @@ func Run(cmd *cobra.Command) (string, error) {
 		return "", errors.Wrap(err, "failed to obtain output")
 	}
 
-	return results, nil
+	return strings.TrimSuffix(results, "\n"), nil
 }

docs/changingwithdrawalcredentials.md

@@ -112,7 +112,6 @@ ethdo account derive --mnemonic='abandon … art' --path='m/12381/3600/0/0' --sh
 again replacing the first '0' in the path with the validator number.  This will provide an output similar to:
 
 ```
-Public key: 0x99b1f1d84d76185466d86c34bde1101316afddae76217aa86cd066979b19858c2c9d9e56eebc1e067ac54277a61790db
 Withdrawal credentials: 0x008ba1cc4b091b91c1202bba3f508075d6ff565c77e559f0803c0792e0302bf1
 ```
 

docs/usage.md

@@ -587,6 +587,14 @@ Validator commands focus on interaction with Ethereum 2 validators.
 $ ethdo validator credentials get --validator=Validators/1
 ```
 
+#### `credentials set`
+
+`ethdo validator credentials set` updates withdrawal credentials from BLS "type 0" credentials to execution "type 1" credentials.  Full information about using this command can be found in the [specific documentation](./changingwithdrawalcredentials.md).
+
+```sh
+$ ethdo validator credentials set --validator=Validators/1 --execution-address=0x8f…9F --private-key=0x3b…9c
+```
+
 #### `depositdata`
 
 `ethdo validator depositdata` generates the data required to deposit one or more Ethereum 2 validators.  Options include: