Support parsing key pairs generated by the solana cli.

README.md

@@ -199,6 +199,13 @@ var signer = PrivateKeyEncoding.fromJsonPrivateKey(ji);
 
 ### JSON Configuration
 
+#### Solana CLI Generated Key Pair JSON Array
+
+By default, if only an array is configured, the assumption is that it is a key pair generated by the Solana CLI.
+
+```json
+[45,8,240,...,23,243,113]
+```
 #### JSON Array
 
 ```json
@@ -210,7 +217,7 @@ var signer = PrivateKeyEncoding.fromJsonPrivateKey(ji);
 ```
 #### Key Pair
 
-Encoded 64 bytes private/public key pair.  Derived public key will be validated.
+Encoded 64 byte private/public key pair.  Derived public key will be validated.
 
 * base64KeyPair
 * base58KeyPair
@@ -225,7 +232,7 @@ Encoded 64 bytes private/public key pair.  Derived public key will be validated.
 
 #### Private Key Only
 
-Encoded 32 bytes private key.
+Encoded 32 byte private key.
 
 * base64PrivateKey
 * base58PrivateKey

rpc/src/main/java/software/sava/rpc/json/PrivateKeyEncoding.java

@@ -66,9 +66,15 @@ public static Signer fromJsonPrivateKey(final JsonIterator ji, final PrivateKeyE
   }
 
   public static Signer fromJsonPrivateKey(final JsonIterator ji) {
-    final var parser = new Parser();
-    ji.testObject(parser);
-    return parser.createSigner(ji);
+    return switch (ji.whatIsNext()) {
+      case ARRAY -> fromJsonPrivateKey(ji, jsonKeyPairArray);
+      case OBJECT -> {
+        final var parser = new Parser();
+        ji.testObject(parser);
+        yield parser.createSigner(ji);
+      }
+      default -> throw new IllegalStateException("Must be a JSON object or private key pair array.");
+    };
   }
 
   private static final class Parser implements FieldBufferPredicate {