diff --git a/lib.rs b/lib.rs
new file mode 100644
index 00000000..b10f7f6c
--- /dev/null
+++ b/lib.rs
@@ -0,0 +1,2 @@
+use soroban_sdk::Address;
+pub fn propose_certificate(issuer: Address) { issuer.require_auth(); }
diff --git a/multisig.rs b/multisig.rs
new file mode 100644
index 00000000..b10f7f6c
--- /dev/null
+++ b/multisig.rs
@@ -0,0 +1,2 @@
+use soroban_sdk::Address;
+pub fn propose_certificate(issuer: Address) { issuer.require_auth(); }