signatures: kept in the document file

A node's signatures are saved with its document (--document-file) and
loaded with it.

Auth plan M5.

1 files changed, 2 insertions, 0 deletions

diff --git a/docs/api.md b/docs/api.md
index 6a328a5..8f5b89c 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -261,6 +261,8 @@ by the node's next signed one: with `--sign-every 1s` (the default), the node si
 latest change at most a second after it if nothing signed it before, so every change is vouched
 for within a second, at one signature a second at most; `--sign-every all` signs every
 change as it is made, and `--sign-every none` signs only those above.
+The signatures a node has are kept in its document file (`--document-file`) with the
+document.
 
 ## Protocol data