diff --git a/known-required-rpcs.md b/known-required-rpcs.md
new file mode 100644
index 0000000..350ddca
--- /dev/null
+++ b/known-required-rpcs.md
@@ -0,0 +1,22 @@
+## c-lightning
+- `echo`
+- `gettxout`
+- `getblockchaininfo`
+- `sendrawtransaction`
+- `getblockhash`
+- `getblock`
+- `estimatesmartfee`
+- `getnetworkinfo`
+
+## LND
+- `getinfo` (deprecated, but LND seems to case on the error message)
+- `getbestblockhash`
+- `gettxout`
+- `getblockchaininfo`
+- `sendrawtransaction`
+- `getblockhash`
+- `getblock`
+- `getblockheader`
+- `estimatesmartfee`
+- `getnetworkinfo`
+
diff --git a/src/users.rs b/src/users.rs
index 08ceed9..449ea79 100644
--- a/src/users.rs
+++ b/src/users.rs
@@ -41,6 +41,7 @@ impl Users {
 pub struct User {
     pub password: String,
     pub allowed_calls: HashSet<String>,
+    #[serde(default)]
     pub fetch_blocks: bool,
 }
 impl User {