blossom test.

signer.ts

@@ -1,6 +1,23 @@
 import { EventTemplate, VerifiedEvent } from './core.ts'
+import { finalizeEvent, getPublicKey } from './pure.ts'
 
 export interface Signer {
   getPublicKey(): Promise<string>
   signEvent(event: EventTemplate): Promise<VerifiedEvent>
 }
+
+export class PlainKeySigner implements Signer {
+  private secretKey: Uint8Array
+
+  constructor(secretKey: Uint8Array) {
+    this.secretKey = secretKey
+  }
+
+  async getPublicKey(): Promise<string> {
+    return getPublicKey(this.secretKey)
+  }
+
+  async signEvent(event: EventTemplate): Promise<VerifiedEvent> {
+    return finalizeEvent(event, this.secretKey)
+  }
+}