Add man page content about error objects.

diff --git a/docs/nano-pow.1 b/docs/nano-pow.1
index eafb43e6a98d6933d97d35b7480b4d7afee0ad0c..302325e9d179507f090d28dd74ad8be377012fe1 100644 (file)
--- a/docs/nano-pow.1
+++ b/docs/nano-pow.1
@@ -126,6 +126,16 @@ Run a benchmark of generating work for 100 random sample blockhashes:
 $ nano-pow \fB\--benchmark 100\fR
 .EE
 
+.SH ERRORS
+Errors encountered during work generation will prompt a retry of the request,
+and further errors will return an error object. Server errors will throw as
+usual.
+.EX
+'{
+    "error": "failed to generate work"
+}'
+.EE
+
 .SH EXAMPLES - SERVER
 .PP
 Generate a work value: