Content - RPC - Add bls

Used to create operator keys for DIP3 Pro*tx special txs

_includes/devdoc/dash-core/rpcs/rpcs/bls.md

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+{% comment %}
+This file is licensed under the MIT License (MIT) available on
+http://opensource.org/licenses/MIT.
+{% endcomment %}
+{% assign filename="_includes/devdoc/dash-core/rpcs/rpcs/bls.md" %}
+
+<!-- __ -->
+
+##### BLS
+{% include helpers/subhead-links.md %}
+
+{% assign summary_bLS="provides a set of commands to execute BLS-related actions." %}
+
+{% autocrossref %}
+
+The `bls` RPC {{summary_bLS}}
+
+{% endautocrossref %}
+
+###### BLS<!--noref--> Generate
+<!-- no subhead-links here -->
+
+{% autocrossref %}
+
+The `bls<!--noref--> generate` RPC creates a new BLS secret/public key pair.
+
+*Parameters: none*
+
+*Result---a secret/public key pair*
+
+{% itemplate ntpd1 %}
+- n: "`result`"
+  t: "object"
+  p: "Required<br>(exactly 1)"
+  d: "BLS key pair"
+
+- n: "→<br>`secret`"
+  t: "string (hex)"
+  p: "Required<br>(exactly 1)"
+  d: "A BLS secret key"
+
+- n: "→<br>`public`"
+  t: "string (hex)"
+  p: "Required<br>(exactly 1)"
+  d: "A BLS public key"
+{% enditemplate %}
+
+*Example from Dash Core 0.13.0*
+
+{% highlight bash %}
+dash-cli -testnet bls generate
+{% endhighlight %}
+
+Result:
+{% highlight bash %}
+{
+  "secret": "52f35cd3d977a505485f2474e7e71ef3f60f859603d72ad6b0fa7f7bd163e144",
+  "public": "885d01d746c3e4d2093b0975de2d8c1f3e5a2c3e8fdaaed929f86fc9fbb278a095248163c101a2456650b415776b7990"
+}
+{% endhighlight %}
+
+*See also: none*
+
+{% endautocrossref %}