diff --git a/.gitignore b/.gitignore
index c9106a7..1e59e82 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
node_modules
.nyc_output
+coverage
diff --git a/index.cjs b/index.cjs
new file mode 100644
index 0000000..1994fc6
--- /dev/null
+++ b/index.cjs
@@ -0,0 +1,44 @@
+// https://github.com/bitcoin/bips/blob/master/bip-0021.mediawiki
+// bitcoin:
[?amount=][?label=