diff --git a/packages/proto-signing/src/index.ts b/packages/proto-signing/src/index.ts
index 37d59ef4..ce95215d 100644
--- a/packages/proto-signing/src/index.ts
+++ b/packages/proto-signing/src/index.ts
@@ -3,3 +3,4 @@ export { decodeAny } from "./any";
 export { Coin } from "./msgs";
 export { cosmosField } from "./decorator";
 export { Registry } from "./registry";
+export { makeSignBytes } from "./signing";
diff --git a/packages/proto-signing/src/signing.spec.ts b/packages/proto-signing/src/signing.spec.ts
index 2e9ebcc0..8f0b5614 100644
--- a/packages/proto-signing/src/signing.spec.ts
+++ b/packages/proto-signing/src/signing.spec.ts
@@ -6,6 +6,7 @@ import { omitDefaults } from "./adr27";
 import { cosmos } from "./generated/codecimpl";
 import { defaultRegistry } from "./msgs";
 import { Registry, TxBodyValue } from "./registry";
+import { makeSignBytes } from "./signing";
 
 const { AuthInfo, SignDoc, Tx, TxBody } = cosmos.tx;
 const { PublicKey } = cosmos.crypto;
@@ -158,7 +159,7 @@ describe("signing demo", () => {
             accountSequence: sequenceNumber,
           }),
         );
-        const signDocBytes = Uint8Array.from(SignDoc.encode(signDoc).finish());
+        const signDocBytes = makeSignBytes(signDoc);
         expect(toHex(signDocBytes)).toEqual(signBytes);
 
         const signature = await wallet.sign(address, signDocBytes);
diff --git a/packages/proto-signing/src/signing.ts b/packages/proto-signing/src/signing.ts
new file mode 100644
index 00000000..1be4332e
--- /dev/null
+++ b/packages/proto-signing/src/signing.ts
@@ -0,0 +1,8 @@
+/* eslint-disable @typescript-eslint/naming-convention */
+import { cosmos } from "./generated/codecimpl";
+
+const { SignDoc } = cosmos.tx;
+
+export function makeSignBytes(signDoc: cosmos.tx.ISignDoc): Uint8Array {
+  return Uint8Array.from(SignDoc.encode(signDoc).finish());
+}
diff --git a/packages/proto-signing/types/index.d.ts b/packages/proto-signing/types/index.d.ts
index 37d59ef4..ce95215d 100644
--- a/packages/proto-signing/types/index.d.ts
+++ b/packages/proto-signing/types/index.d.ts
@@ -3,3 +3,4 @@ export { decodeAny } from "./any";
 export { Coin } from "./msgs";
 export { cosmosField } from "./decorator";
 export { Registry } from "./registry";
+export { makeSignBytes } from "./signing";
diff --git a/packages/proto-signing/types/signing.d.ts b/packages/proto-signing/types/signing.d.ts
new file mode 100644
index 00000000..a6b776ff
--- /dev/null
+++ b/packages/proto-signing/types/signing.d.ts
@@ -0,0 +1,2 @@
+import { cosmos } from "./generated/codecimpl";
+export declare function makeSignBytes(signDoc: cosmos.tx.ISignDoc): Uint8Array;