diff --git a/packages/authority/package.json b/packages/authority/package.json
index b3c6a9c..a145b58 100644
--- a/packages/authority/package.json
+++ b/packages/authority/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@holoom/authority",
-  "version": "0.1.0-dev.6",
+  "version": "0.1.0-dev.7",
   "description": "Helpers for interacting with a holoom network authority agent",
   "type": "module",
   "license": "MIT",
diff --git a/packages/authority/src/evm-bytes-signer/bytes-signer.ts b/packages/authority/src/evm-bytes-signer/bytes-signer.ts
index daf7559..cb77c21 100644
--- a/packages/authority/src/evm-bytes-signer/bytes-signer.ts
+++ b/packages/authority/src/evm-bytes-signer/bytes-signer.ts
@@ -1,4 +1,4 @@
-import { Hex, hexToBytes } from "viem";
+import { bytesToBigInt, encodePacked, Hex, hexToBytes } from "viem";
 import { privateKeyToAccount, PrivateKeyAccount } from "viem/accounts";
 import { formatEvmSignature } from "./utils.js";
 
@@ -12,13 +12,11 @@ export class BytesSigner {
 
   async sign(u256_array: Uint8Array[]) {
     console.log("signing u256_array", u256_array);
-    const packed = new Uint8Array(
-      u256_array.flatMap((u256) => Array.from(u256))
+    const message = encodePacked(
+      ["uint256[]"],
+      [u256_array.map((u256) => bytesToBigInt(u256))]
     );
-    if (packed.length !== 32 * u256_array.length) {
-      throw Error("Bad packing of u256_array");
-    }
-    const hex = await this.account.signMessage({ message: { raw: packed } });
+    const hex = await this.account.signMessage({ message });
     return formatEvmSignature(hex);
   }
 }
diff --git a/packages/client/package.json b/packages/client/package.json
index c213766..32a21d4 100644
--- a/packages/client/package.json
+++ b/packages/client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@holoom/client",
-  "version": "0.1.0-dev.6",
+  "version": "0.1.0-dev.7",
   "description": "Helpers for interacting with a holoom network agent",
   "type": "module",
   "license": "MIT",
diff --git a/packages/e2e/tests/signing-offer.test.js b/packages/e2e/tests/signing-offer.test.js
index c32c6b4..ca6a578 100644
--- a/packages/e2e/tests/signing-offer.test.js
+++ b/packages/e2e/tests/signing-offer.test.js
@@ -1,6 +1,6 @@
 const { startTestContainers } = require("./utils/testcontainers");
 const { loadPageAndRegister } = require("./utils/holo");
-const { verifyMessage, bytesToHex } = require("viem");
+const { verifyMessage, bytesToHex, encodePacked } = require("viem");
 
 describe("signing-offer", () => {
   let testContainers;
@@ -30,7 +30,8 @@ describe("signing-offer", () => {
               {
                 type: "Jq",
                 input_var_names: { type: "List", var_names: [] },
-                program: '["f39Fd6e51aad88F6F4ce6aB8827279cffFb92266", 123]',
+                program:
+                  '[1, "06f05b59d3b20000", "1B5f0EaE225491eE0b629A2f70761E3288f18E08"]',
               },
             ],
           ],
@@ -50,7 +51,7 @@ describe("signing-offer", () => {
         identifier: "123",
         evm_signing_offer: {
           recipe_ah,
-          u256_items: [{ type: "Hex" }, { type: "Uint" }],
+          u256_items: [{ type: "Uint" }, { type: "Hex" }, { type: "Hex" }],
         },
       }),
     });
@@ -113,15 +114,13 @@ describe("signing-offer", () => {
     );
     debug("Executed recipe and received signature for it");
 
+    const message = encodePacked(
+      ["uint256", "uint256", "uint256"],
+      [1, "0x06f05b59d3b20000", "0x1B5f0EaE225491eE0b629A2f70761E3288f18E08"]
+    );
+
     const isValid = await verifyMessage({
-      message: {
-        raw: new Uint8Array([
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 243, 159, 214, 229, 26, 173, 136,
-          246, 244, 206, 106, 184, 130, 114, 121, 207, 255, 185, 34, 102, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 123,
-        ]),
-      },
+      message,
       signature: bytesToHex(new Uint8Array(signature)),
       address: "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266",
     });