diff --git a/src/components/AddProposal/AddProposal.tsx b/src/components/AddProposal/AddProposal.tsx
index 09691887..672b62f7 100644
--- a/src/components/AddProposal/AddProposal.tsx
+++ b/src/components/AddProposal/AddProposal.tsx
@@ -22,6 +22,7 @@ import { ProposalText } from "./ProposalText";
 import { proposeOptions } from "./proposeOptions";
 import { useAccount, useSendTransaction } from "@starknet-react/core";
 import { useOptions } from "../../hooks/useOptions";
+import { stringToBigint } from "../../utils/conversions";
 
 const strkUsdcCallPool = new Pool(STRK_ADDRESS, USDC_ADDRESS, OptionType.Call);
 
@@ -165,15 +166,15 @@ export const AddProposal = () => {
           pool.quoteToken.symbol
         }-${pool.typeAsText.toUpperCase()}-`;
         return [
-          name + "LONG",
-          name + "SHORT",
+          stringToBigint(name + "LONG").toString(10),
+          stringToBigint(name + "SHORT").toString(10),
           o.maturity.toString(10),
           decimalToMath64(o.strike),
           "0", // Fixed sign
-          pool.type,
-          pool.lpAddress,
-          pool.quoteToken.address,
-          pool.baseToken.address,
+          BigInt(pool.type).toString(10),
+          BigInt(pool.lpAddress).toString(10),
+          BigInt(pool.quoteToken.address).toString(10),
+          BigInt(pool.baseToken.address).toString(10),
           decimalToMath64(o.volatility),
           "0", // Fixed sign
         ];
diff --git a/src/components/AddProposal/proposeOptions.ts b/src/components/AddProposal/proposeOptions.ts
index a0dcdeb3..ff4ea45b 100644
--- a/src/components/AddProposal/proposeOptions.ts
+++ b/src/components/AddProposal/proposeOptions.ts
@@ -9,16 +9,17 @@ export const proposeOptions = async (
     args?: Call[]
   ) => Promise<RequestResult<"wallet_addInvokeTransaction">>
 ) => {
+  const calldata = [
+    "2", // add options custom proposal prop id
+    options.length + 2, // length of the payload Span<felt252>
+    AMM_ADDRESS,
+    options.length / 11, // length of the array of options (each option is 11 fields)
+    ...options,
+  ];
   const call = {
     contractAddress: GOVERNANCE_ADDRESS,
     entrypoint: "submit_custom_proposal",
-    calldata: [
-      "0x2", // add options custom proposal prop id
-      options.length + 2, // length of the payload Span<felt252>
-      AMM_ADDRESS,
-      options.length / 11, // length of the array of options (each option is 11 fields)
-      ...options,
-    ],
+    calldata,
   };
 
   debug("Executing add options proposal:", call);
diff --git a/src/setupTests.ts b/src/setupTests.ts
index 1dd407a6..63fb8248 100644
--- a/src/setupTests.ts
+++ b/src/setupTests.ts
@@ -3,3 +3,6 @@
 // expect(element).toHaveTextContent(/react/i)
 // learn more: https://github.com/testing-library/jest-dom
 import "@testing-library/jest-dom";
+// src/setupTests.js
+global.TextEncoder = require("util").TextEncoder;
+global.TextDecoder = require("util").TextDecoder; // Optional if you need TextDecoder as well
diff --git a/src/utils/conversions.test.ts b/src/utils/conversions.test.ts
new file mode 100644
index 00000000..234c261e
--- /dev/null
+++ b/src/utils/conversions.test.ts
@@ -0,0 +1,21 @@
+import { stringToBigint } from "./conversions";
+
+describe("convert text to felt", () => {
+  const cases: [string, bigint][] = [
+    ["STRK-USDC-CALL-LONG", 1858307286577880742802534252795740158654631495n],
+    ["STRK-USDC-CALL-SHORT", 475726665363937470157448768715709480645533061716n],
+    ["STRK-USDC-PUT-LONG", 7259012838194846651572400367370245491347015n],
+    ["STRK-USDC-PUT-SHORT", 1858307286577880742802534494046782875732234836n],
+    ["ETH-USDC-CALL-LONG", 6039427387912472877549585711181846421655111n],
+    ["ETH-USDC-CALL-SHORT", 1546093411305593056652693942062552713891107412n],
+  ];
+
+  test("pool names", () => {
+    cases.forEach(([text, felt]) => {
+      const result = stringToBigint(text);
+      expect(result === felt).toBe(true);
+    });
+  });
+});
+
+export {};
diff --git a/src/utils/conversions.ts b/src/utils/conversions.ts
index 8a7d653b..33546498 100644
--- a/src/utils/conversions.ts
+++ b/src/utils/conversions.ts
@@ -21,3 +21,14 @@ export const bnToOptionSide = (n: BigNumberish): OptionSide =>
 
 export const bnToOptionType = (n: BigNumberish): OptionType =>
   BigInt(n) === 1n ? OptionType.Put : OptionType.Call;
+
+export const stringToBigint = (txt: string): bigint => {
+  const bText = new TextEncoder().encode(txt);
+  let result = 0n;
+
+  for (let byte of bText) {
+    result = (result << BigInt(8)) + BigInt(byte);
+  }
+
+  return result;
+};