diff --git a/src/signature.ts b/src/signature.ts
new file mode 100644
index 0000000..e2abae2
--- /dev/null
+++ b/src/signature.ts
@@ -0,0 +1,21 @@
+import logger from 'log'
+import * as ed from '@noble/ed25519'
+
+const log = logger('crypto:signature')
+
+export async function gen_privkey() : Promise<Uint8Array> {
+    log.trace("generate keypair")
+    return ed.utils.randomPrivateKey()
+}
+export async function get_pubkey(privkey: Uint8Array) : Promise<Uint8Array> {
+    log.trace("derive pubky")
+    return ed.getPublicKeyAsync(privkey)
+}
+export async function sign(message: Uint8Array, privkey: Uint8Array) : Promise<Uint8Array> {
+    log.trace("sign")
+    return ed.signAsync(message, privkey)
+}
+export async function verify(message: Uint8Array, pubkey: Uint8Array, signature: Uint8Array) : Promise<boolean> {
+    log.trace("verify")
+    return ed.verifyAsync(signature, message, pubkey)
+}