diff --git a/package.json b/package.json
index b256294..65738eb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.13",
+  "version": "0.20.15",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",
diff --git a/src/Unit/Exchange/callGenerators/utils.ts b/src/Unit/Exchange/callGenerators/utils.ts
index e49217b..b61dc4b 100644
--- a/src/Unit/Exchange/callGenerators/utils.ts
+++ b/src/Unit/Exchange/callGenerators/utils.ts
@@ -87,6 +87,10 @@ export function generateCalls(calls: BytesLike[]) {
 }
 
 export async function exchangeToNativeDecimals(token: AddressLike, amount: BigNumberish, provider: ethers.JsonRpcProvider) {
+  return await toNativeDecimals(token, amount, provider) / (BigInt(10) ** 8n)
+}
+
+export async function toNativeDecimals(token: AddressLike, amount: BigNumberish, provider: ethers.JsonRpcProvider) {
   token = await token
   if (typeof token !== "string") token = await token.getAddress()
 
@@ -95,5 +99,5 @@ export async function exchangeToNativeDecimals(token: AddressLike, amount: BigNu
     const contract = ERC20__factory.connect(token, provider)
     decimals = BigInt(await contract.decimals())
   }
-  return BigInt(amount) * (BigInt(10) ** decimals) / (BigInt(10) ** 8n)
+  return BigInt(amount) * (BigInt(10) ** decimals)
 }
\ No newline at end of file
diff --git a/src/Unit/Exchange/generateSwapCalldata.ts b/src/Unit/Exchange/generateSwapCalldata.ts
index e792a27..506c79b 100644
--- a/src/Unit/Exchange/generateSwapCalldata.ts
+++ b/src/Unit/Exchange/generateSwapCalldata.ts
@@ -17,8 +17,7 @@ import type { SingleSwap } from "../../types.js";
 import type { AddressLike } from "ethers";
 import { addressLikeToString } from "../../utils/addressLikeToString.js";
 import { generateUnwrapAndTransferCall, generateWrapAndTransferCall } from "./callGenerators/weth.js";
-import { Exchange__factory } from "@orionprotocol/contracts/lib/ethers-v6/index.js";
-import getBalance from "../../utils/getBalance.js";
+import { getWalletBalance } from "../../utils/getBalance.js";
 
 export type Factory = "UniswapV2" | "UniswapV3" | "Curve" | "OrionV2" | "OrionV3";
 
@@ -57,17 +56,14 @@ export async function generateSwapCalldataWithUnit({
   }
   const wethAddress = safeGet(unit.contracts, "WETH");
   const curveRegistryAddress = safeGet(unit.contracts, "curveRegistry");
-  const { assetToAddress, swapExecutorContractAddress, exchangeContractAddress } = await simpleFetch(
+  const { assetToAddress, swapExecutorContractAddress } = await simpleFetch(
     unit.blockchainService.getInfo
   )();
 
   let path = SafeArray.from(arrayLikePath);
-  const { wallet } = await getBalance(
-    unit.aggregator,
-    path.first().assetIn,
+  const walletBalance = await getWalletBalance(
     safeGet(assetToAddress, path.first().assetIn),
     receiverAddress,
-    Exchange__factory.connect(exchangeContractAddress, unit.provider),
     unit.provider
   );
 
@@ -81,7 +77,7 @@ export async function generateSwapCalldataWithUnit({
     amount,
     minReturnAmount,
     receiverAddress,
-    useContractBalance: BigInt(wallet.toString()) < BigInt(amount),
+    useContractBalance: walletBalance < await exchangeToNativeDecimals(path.first().assetIn, amount, unit.provider),
     path,
     wethAddress,
     curveRegistryAddress,
diff --git a/src/config/chains.json b/src/config/chains.json
index 0cba1b0..68b940c 100644
--- a/src/config/chains.json
+++ b/src/config/chains.json
@@ -35,7 +35,7 @@
     "baseCurrencyName": "BNB",
     "contracts": {
       "WETH": "0x23eE96bEaAB62abE126AA192e677c52bB7d274F0",
-      "curveRegistry": "0x8845b36C3DE93379F468590FFa102D4aF8C49A6c"
+      "curveRegistry": "0x93461072c00b2740c474a3d52c70be6249c802d8"
     }
   },
   "3": {
diff --git a/src/crypt/index.ts b/src/crypt/index.ts
index 8dbb278..d09530a 100644
--- a/src/crypt/index.ts
+++ b/src/crypt/index.ts
@@ -1,4 +1,2 @@
 export { default as signCancelOrder } from './signCancelOrder.js';
-export { default as signCancelOrderPersonal } from './signCancelOrderPersonal.js';
 export { default as signOrder } from './signOrder.js';
-export { default as signOrderPersonal } from './signOrderPersonal.js';
diff --git a/src/crypt/signCancelOrder.ts b/src/crypt/signCancelOrder.ts
index ff49d22..f9bd329 100644
--- a/src/crypt/signCancelOrder.ts
+++ b/src/crypt/signCancelOrder.ts
@@ -3,33 +3,27 @@ import { ethers } from 'ethers';
 import CANCEL_ORDER_TYPES from '../constants/cancelOrderTypes.js';
 import type { CancelOrderRequest, SignedCancelOrderRequest, SupportedChainId } from '../types.js';
 import getDomainData from './getDomainData.js';
-import signCancelOrderPersonal from './signCancelOrderPersonal.js';
 
 type SignerWithTypedDataSign = ethers.Signer & TypedDataSigner;
 
 const signCancelOrder = async (
   senderAddress: string,
   id: string,
-  usePersonalSign: boolean,
   signer: ethers.Signer,
   chainId: SupportedChainId,
 ) => {
   const cancelOrderRequest: CancelOrderRequest = {
     id,
     senderAddress,
-    isPersonalSign: usePersonalSign,
   };
   // eslint-disable-next-line @typescript-eslint/consistent-type-assertions
   const typedDataSigner = signer as SignerWithTypedDataSign;
 
-  const signature = usePersonalSign
-    ? await signCancelOrderPersonal(cancelOrderRequest, signer)
-  // https://docs.ethers.io/v5/api/signer/#Signer-signTypedData
-    : await typedDataSigner.signTypedData(
-      getDomainData(chainId),
-      CANCEL_ORDER_TYPES,
-      cancelOrderRequest,
-    );
+  const signature = await typedDataSigner.signTypedData(
+    getDomainData(chainId),
+    CANCEL_ORDER_TYPES,
+    cancelOrderRequest,
+  );
 
   // https://github.com/poap-xyz/poap-fun/pull/62#issue-928290265
   // "Signature's v was always send as 27 or 28, but from Ledger was 0 or 1"
diff --git a/src/crypt/signCancelOrderPersonal.ts b/src/crypt/signCancelOrderPersonal.ts
deleted file mode 100644
index 2837c3b..0000000
--- a/src/crypt/signCancelOrderPersonal.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import { ethers } from 'ethers';
-import type { CancelOrderRequest } from '../types.js';
-
-const signCancelOrderPersonal = async (
-  cancelOrderRequest: CancelOrderRequest,
-  signer: ethers.Signer,
-) => {
-  const types = ['string', 'string', 'address'];
-  const message = ethers.solidityPackedKeccak256(
-    types,
-    ['cancelOrder', cancelOrderRequest.id, cancelOrderRequest.senderAddress],
-  );
-  const signature = await signer.signMessage(ethers.getBytes(message));
-
-  // NOTE: metamask broke sig.v value and we fix it in next line
-  return ethers.Signature.from(signature).serialized;
-};
-
-export default signCancelOrderPersonal;
diff --git a/src/crypt/signOrder.ts b/src/crypt/signOrder.ts
index 90e59df..fca41a7 100644
--- a/src/crypt/signOrder.ts
+++ b/src/crypt/signOrder.ts
@@ -7,7 +7,6 @@ import type { Order, SignedOrder, SupportedChainId } from '../types.js';
 import normalizeNumber from '../utils/normalizeNumber.js';
 import getDomainData from './getDomainData.js';
 import hashOrder from './hashOrder.js';
-import signOrderPersonal from './signOrderPersonal.js';
 
 const DEFAULT_EXPIRATION = 29 * 24 * 60 * 60 * 1000; // 29 days
 
@@ -23,7 +22,6 @@ export const signOrder = async (
   senderAddress: string,
   matcherAddress: string,
   serviceFeeAssetAddr: string,
-  usePersonalSign: boolean,
   signer: ethers.Signer,
   chainId: SupportedChainId,
 ) => {
@@ -54,19 +52,16 @@ export const signOrder = async (
     nonce,
     expiration,
     buySide: side === 'BUY' ? 1 : 0,
-    isPersonalSign: usePersonalSign,
   };
 
   // eslint-disable-next-line @typescript-eslint/consistent-type-assertions
   const typedDataSigner = signer as SignerWithTypedDataSign;
 
-  const signature = usePersonalSign
-    ? await signOrderPersonal(order, signer)
-    : await typedDataSigner.signTypedData(
-      getDomainData(chainId),
-      ORDER_TYPES,
-      order,
-    );
+  const signature = await typedDataSigner.signTypedData(
+    getDomainData(chainId),
+    ORDER_TYPES,
+    order,
+  );
 
   // https://github.com/poap-xyz/poap-fun/pull/62#issue-928290265
   // "Signature's v was always send as 27 or 28, but from Ledger was 0 or 1"
diff --git a/src/crypt/signOrderPersonal.ts b/src/crypt/signOrderPersonal.ts
deleted file mode 100644
index 4573e96..0000000
--- a/src/crypt/signOrderPersonal.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-import { ethers } from 'ethers';
-import type { Order } from '../types.js';
-
-const signOrderPersonal = async (order: Order, signer: ethers.Signer) => {
-  const message = ethers.solidityPackedKeccak256(
-    [
-      'string', 'address', 'address', 'address', 'address',
-      'address', 'uint64', 'uint64', 'uint64', 'uint64', 'uint64', 'uint8',
-    ],
-    [
-      'order',
-      order.senderAddress,
-      order.matcherAddress,
-      order.baseAsset,
-      order.quoteAsset,
-      order.matcherFeeAsset,
-      order.amount,
-      order.price,
-      order.matcherFee,
-      order.nonce,
-      order.expiration,
-      order.buySide,
-    ],
-  );
-  const signature = await signer.signMessage(ethers.getBytes(message));
-
-  // NOTE: metamask broke sig.v value and we fix it in next line
-  return ethers.Signature.from(signature).serialized;
-};
-
-export default signOrderPersonal;
diff --git a/src/types.ts b/src/types.ts
index be08dd2..a528108 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -48,7 +48,6 @@ export type Order = {
   nonce: number // uint64
   expiration: number // uint64
   buySide: 0 | 1 // uint8, 1=buy, 0=sell
-  isPersonalSign: boolean // bool
 }
 
 export type SignedOrder = {
@@ -60,7 +59,6 @@ export type SignedOrder = {
 export type CancelOrderRequest = {
   id: number | string
   senderAddress: string
-  isPersonalSign: boolean
 }
 
 export type SignedCancelOrderRequest = {
diff --git a/src/utils/getBalance.ts b/src/utils/getBalance.ts
index 35738ce..e7c84b2 100644
--- a/src/utils/getBalance.ts
+++ b/src/utils/getBalance.ts
@@ -41,3 +41,22 @@ export default async function getBalance(
     wallet: denormalizedAssetInWalletBalance,
   };
 }
+
+export async function getWalletBalance(
+  assetAddress: string,
+  walletAddress: string,
+  provider: ethers.Provider,
+) {
+  const assetIsNativeCryptocurrency = assetAddress === ethers.ZeroAddress;
+
+  let assetWalletBalance: bigint | undefined;
+
+  if (!assetIsNativeCryptocurrency) {
+    const assetContract = ERC20__factory.connect(assetAddress, provider);
+    assetWalletBalance = await assetContract.balanceOf(walletAddress);
+  } else {
+    assetWalletBalance = await provider.getBalance(walletAddress);
+  }
+
+  return assetWalletBalance 
+}