From 7de32b0ab82358b7bdbccd68e25376c4f59473a5 Mon Sep 17 00:00:00 2001
From: Nicolas Assouad <nicolasassouad75@gmail.com>
Date: Tue, 1 Apr 2025 18:52:47 +0200
Subject: [PATCH] feat: new external signer to handle external signer provider
 such as Dfns

---
 src/signer/externalSigner.ts | 23 +++++++++++++++++++++++
 src/signer/index.ts          |  1 +
 2 files changed, 24 insertions(+)
 create mode 100644 src/signer/externalSigner.ts

diff --git a/src/signer/externalSigner.ts b/src/signer/externalSigner.ts
new file mode 100644
index 000000000..3afc9be79
--- /dev/null
+++ b/src/signer/externalSigner.ts
@@ -0,0 +1,23 @@
+import { Signature } from '../types';
+import { Signer } from './default';
+import { SignerInterface } from './interface';
+
+export class ExternalSigner extends Signer implements SignerInterface {
+  private readonly pubkey: () => Promise<string>;
+
+  private readonly signHash: (hash: string) => Promise<Signature>;
+
+  constructor(pubkey: () => Promise<string>, signHash: (hash: string) => Promise<Signature>) {
+    super();
+    this.pubkey = pubkey;
+    this.signHash = signHash;
+  }
+
+  public async getPubKey(): Promise<string> {
+    return this.pubkey();
+  }
+
+  protected async signRaw(hash: string): Promise<Signature> {
+    return this.signHash(hash);
+  }
+}
diff --git a/src/signer/index.ts b/src/signer/index.ts
index 2a5e89a79..2d8c6dbf5 100644
--- a/src/signer/index.ts
+++ b/src/signer/index.ts
@@ -1,6 +1,7 @@
 export * from './interface';
 export * from './default';
 export * from './ethSigner';
+export * from './externalSigner';
 export {
   LedgerSigner111,
   getLedgerPathBuffer111,