diff --git a/.gitignore b/.gitignore
index 90daadb..2b5397c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ coverage
 *.tgz
 *.log
 .turbo
+.hidden
diff --git a/packages/client-test/data/shop_info0.json b/packages/client-test/data/shop_info0.json
new file mode 100644
index 0000000..fcd8e03
--- /dev/null
+++ b/packages/client-test/data/shop_info0.json
@@ -0,0 +1,5 @@
+{
+    "shopId": "0x00011936a68f7c26797fa2ab64d444ea82c2fb1af36cdea6d4ff845da635f287",
+    "address": "0xB6f69F0e9e70034ba0578C542476cC13eF739269",
+    "privateKey": "0x595f911dcf0845cb1f2d0e5cec9f1ccfd62fa199ebeae215a72aa56014edbb32"
+}
diff --git a/packages/client-test/data/shop_info1.json b/packages/client-test/data/shop_info1.json
new file mode 100644
index 0000000..e4d6f31
--- /dev/null
+++ b/packages/client-test/data/shop_info1.json
@@ -0,0 +1,5 @@
+{
+    "shopId": "0x00011f2355a63165608a0f1c00cf1a03183cf9e7e0becb874092f1cdf9db8aa0",
+    "address": "0x9b3ABc653D15B5a0f4E43E6340096C1C9BB2CA2f",
+    "privateKey": "0xc3bc6d1141896f1729ece9c7a8bb97c6222cac8e7d902317746b073a369a263e"
+}
diff --git a/packages/client-test/data/shop_infos.json b/packages/client-test/data/shop_infos.json
new file mode 100644
index 0000000..f851e03
--- /dev/null
+++ b/packages/client-test/data/shop_infos.json
@@ -0,0 +1,14 @@
+[{
+  "shopId": "0x00011936a68f7c26797fa2ab64d444ea82c2fb1af36cdea6d4ff845da635f287",
+  "address": "0xB6f69F0e9e70034ba0578C542476cC13eF739269",
+  "privateKey": "0x595f911dcf0845cb1f2d0e5cec9f1ccfd62fa199ebeae215a72aa56014edbb32",
+  "name": "상점1",
+  "currency": "php"
+},{
+  "shopId": "0x00011f2355a63165608a0f1c00cf1a03183cf9e7e0becb874092f1cdf9db8aa0",
+  "address": "0x9b3ABc653D15B5a0f4E43E6340096C1C9BB2CA2f",
+  "privateKey": "0xc3bc6d1141896f1729ece9c7a8bb97c6222cac8e7d902317746b073a369a263e",
+  "name": "상점2",
+  "currency": "php"
+}
+]
diff --git a/packages/client-test/data/user_info.json b/packages/client-test/data/user_info.json
index 77e21ec..f67e6d6 100644
--- a/packages/client-test/data/user_info.json
+++ b/packages/client-test/data/user_info.json
@@ -1,5 +1,5 @@
 {
     "phone": "+82 10-9520-1803",
-    "address": "0x9a568e50556e7d51d1d477b22C28a099d33Ea04f",
-    "privateKey": "0x00e8b7fdbed0d29a71339ca7699ff3982708867725e8c49e04ced69222189551"
+    "address": "0x5A3Fc8990417b3e6ddCdAE0E8039E798A609Ef84",
+    "privateKey": "0x1f38c07e88ca6bc2f7790f09a27bfc39f4524cf2a322d003435392cfa0d6dae3"
 }
diff --git a/packages/client-test/package.json b/packages/client-test/package.json
index 2ca2fe0..d03a982 100644
--- a/packages/client-test/package.json
+++ b/packages/client-test/package.json
@@ -13,9 +13,11 @@
         "26-ledger:balance:point": "npx ts-node scripts/2-ledger/point.ts",
         "27-ledger:balance:unpayable": "npx ts-node scripts/2-ledger/unpayable.ts",
         "28-ledger:exchange:toToken": "npx ts-node scripts/2-ledger/changeToToken.ts",
-        "31-shop:add": "npx ts-node scripts/3-shop/add.ts",
-        "31-shop:get": "npx ts-node scripts/3-shop/get.ts",
-        "32-shop:createId": "npx ts-node scripts/3-shop/createId.ts",
+        "31-shop:addOne": "npx ts-node scripts/3-shop/addOne.ts",
+        "34-shop:addTwo": "npx ts-node scripts/3-shop/addTwo.ts",
+        "32-shop:get": "npx ts-node scripts/3-shop/get.ts",
+        "33-shop:createId": "npx ts-node scripts/3-shop/createId.ts",
+        "35-shop:refund": "npx ts-node scripts/3-shop/refund.ts",
         "41-save:account": "npx ts-node scripts/4-save/account.ts",
         "42-save:phone": "npx ts-node scripts/4-save/phone.ts",
         "51-use:new": "npx ts-node scripts/5-use/new.ts",
@@ -55,7 +57,7 @@
         "@types/mocha": "^10.0.0",
         "@types/node": "^12.20.43",
         "@types/urijs": "^1.19.12",
-        "acc-sdk-client-v2": "~2.7.0",
+        "acc-sdk-client-v2": "~2.8.0",
         "assert": "^2.0.0",
         "axios": "^1.6.7",
         "beautify": "^0.0.8",
diff --git a/packages/client-test/scripts/2-ledger/changeToToken.ts b/packages/client-test/scripts/2-ledger/changeToToken.ts
index 43211e4..7af4b52 100644
--- a/packages/client-test/scripts/2-ledger/changeToToken.ts
+++ b/packages/client-test/scripts/2-ledger/changeToToken.ts
@@ -10,7 +10,7 @@ async function main() {
     const context: Context = new Context(contextParams);
     const client = new Client(context);
 
-    const amount = BOACoin.make("10_000");
+    const amount = BOACoin.make("1_000");
     for await (const step of client.ledger.exchangePointToToken(amount.value)) {
         switch (step.key) {
             case NormalSteps.PREPARED:
diff --git a/packages/client-test/scripts/3-shop/add.ts b/packages/client-test/scripts/3-shop/addOne.ts
similarity index 100%
rename from packages/client-test/scripts/3-shop/add.ts
rename to packages/client-test/scripts/3-shop/addOne.ts
diff --git a/packages/client-test/scripts/3-shop/addTwo.ts b/packages/client-test/scripts/3-shop/addTwo.ts
new file mode 100644
index 0000000..8a1283a
--- /dev/null
+++ b/packages/client-test/scripts/3-shop/addTwo.ts
@@ -0,0 +1,48 @@
+import { Helper } from "../utils";
+import { Client, Context, ContextBuilder, ContractUtils, NormalSteps } from "acc-sdk-client-v2";
+import fs from "fs";
+import { Wallet } from "ethers";
+
+async function main() {
+    const shopInfos = JSON.parse(fs.readFileSync("./data/shop_infos.json", "utf8")).map(
+        (m: { shopId: string; privateKey: string; name: string; currency: string }) => {
+            return {
+                shopId: m.shopId,
+                wallet: new Wallet(m.privateKey),
+                name: m.name,
+                currency: m.currency,
+            };
+        }
+    );
+    for (const shopInfo of shopInfos) {
+        const contextParams = ContextBuilder.buildContextParams(Helper.NETWORK, shopInfo.wallet.privateKey);
+        if (Helper.RELAY_ENDPOINT !== "") contextParams.relayEndpoint = Helper.RELAY_ENDPOINT;
+        if (Helper.WEB3_ENDPOINT !== "") contextParams.web3Provider = Helper.WEB3_ENDPOINT;
+        const context: Context = new Context(contextParams);
+        const client = new Client(context);
+        console.log("상점 데이타를 추가합니다.");
+
+        for await (const step of client.shop.add(shopInfo.shopId, shopInfo.name, shopInfo.currency)) {
+            switch (step.key) {
+                case NormalSteps.PREPARED:
+                    console.log("NormalSteps.PREPARED");
+                    break;
+                case NormalSteps.SENT:
+                    console.log("NormalSteps.SENT");
+                    break;
+                case NormalSteps.DONE:
+                    console.log("NormalSteps.DONE");
+                    break;
+                default:
+                    throw new Error("Unexpected add shop step: " + JSON.stringify(step, null, 2));
+            }
+        }
+
+        await ContractUtils.delay(1000);
+    }
+}
+
+main().catch((error) => {
+    console.error(error);
+    process.exitCode = 1;
+});
diff --git a/packages/client-test/scripts/3-shop/get.ts b/packages/client-test/scripts/3-shop/get.ts
index 37231de..f8e3a08 100644
--- a/packages/client-test/scripts/3-shop/get.ts
+++ b/packages/client-test/scripts/3-shop/get.ts
@@ -6,6 +6,9 @@ const beautify = require("beautify");
 
 async function main() {
     const shopInfo = Helper.loadShopInfo();
+    console.log(`shopId: ${shopInfo.shopId}`);
+    console.log(`wallet.address: ${shopInfo.wallet.address}`);
+
     const contextParams = ContextBuilder.buildContextParams(Helper.NETWORK, shopInfo.wallet.privateKey);
     if (Helper.RELAY_ENDPOINT !== "") contextParams.relayEndpoint = Helper.RELAY_ENDPOINT;
     if (Helper.WEB3_ENDPOINT !== "") contextParams.web3Provider = Helper.WEB3_ENDPOINT;
diff --git a/packages/client-test/scripts/3-shop/refund.ts b/packages/client-test/scripts/3-shop/refund.ts
new file mode 100644
index 0000000..b16ba98
--- /dev/null
+++ b/packages/client-test/scripts/3-shop/refund.ts
@@ -0,0 +1,60 @@
+import { Helper } from "../utils";
+import { Amount, Client, Context, ContextBuilder, NormalSteps } from "acc-sdk-client-v2";
+import { BOACoin } from "../../src/Amount";
+import { BigNumber } from "@ethersproject/bignumber";
+
+const beautify = require("beautify");
+
+async function main() {
+    const shopInfo = Helper.loadShopInfo();
+    console.log(`shopId: ${shopInfo.shopId}`);
+    console.log(`wallet.address: ${shopInfo.wallet.address}`);
+
+    const contextParams = ContextBuilder.buildContextParams(Helper.NETWORK, shopInfo.wallet.privateKey);
+    if (Helper.RELAY_ENDPOINT !== "") contextParams.relayEndpoint = Helper.RELAY_ENDPOINT;
+    if (Helper.WEB3_ENDPOINT !== "") contextParams.web3Provider = Helper.WEB3_ENDPOINT;
+    const context: Context = new Context(contextParams);
+    const client = new Client(context);
+
+    console.log("상점 정보를 요청합니다.");
+    const info = await client.shop.getShopInfo(shopInfo.shopId);
+    const refundable = await client.shop.getRefundableAmount(shopInfo.shopId);
+
+    console.log("처리결과입니다.");
+    console.log(`shopId: ${info.shopId}`);
+    console.log(`name: ${info.name}`);
+    console.log(`currency: ${info.currency}`);
+    console.log(`account: ${info.account}`);
+    console.log(`delegator: ${info.delegator}`);
+    console.log(`providedAmount: ${new BOACoin(info.providedAmount).toDisplayString(true, 2)}`);
+    console.log(`usedAmount: ${new BOACoin(info.usedAmount).toDisplayString(true, 2)}`);
+    console.log(`refundedAmount: ${new BOACoin(info.refundedAmount).toDisplayString(true, 2)}`);
+    console.log(`refundableAmount: ${new BOACoin(refundable.refundableAmount).toDisplayString(true, 2)}`);
+
+    if (refundable.refundableAmount.gt(BigNumber.from(0))) {
+        for await (const step of client.shop.refund(shopInfo.shopId, refundable.refundableAmount)) {
+            switch (step.key) {
+                case NormalSteps.PREPARED:
+                    console.log(`NormalSteps.PREPARED`);
+                    console.log(`step.shopId: ${step.shopId}`);
+                    console.log(`step.signature: ${step.signature}`);
+                    break;
+                case NormalSteps.SENT:
+                    console.log(`NormalSteps.SENT`);
+                    console.log(`step.txHash: ${step.txHash}`);
+                    break;
+                case NormalSteps.DONE:
+                    console.log(`NormalSteps.DONE`);
+                    console.log(`step.refundAmount: ${step.refundAmount.toString()}`);
+                    break;
+                default:
+                    throw new Error("Unexpected open withdrawal step: " + JSON.stringify(step, null, 2));
+            }
+        }
+    }
+}
+
+main().catch((error) => {
+    console.error(error);
+    process.exitCode = 1;
+});
diff --git a/packages/client/package.json b/packages/client/package.json
index eefa2aa..e09abbb 100644
--- a/packages/client/package.json
+++ b/packages/client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "acc-sdk-client-v2",
-  "version": "2.7.0",
+  "version": "2.8.0",
   "author": "BOSagora Foundation",
   "license": "AGPL-3.0-or-later",
   "main": "dist/index.js",
@@ -81,7 +81,7 @@
     "@ethersproject/providers": "^5.7.0",
     "@ethersproject/random": "^5.7.0",
     "@ethersproject/wallet": "^5.7.0",
-    "acc-contracts-lib-v2": "~2.5.0",
+    "acc-contracts-lib-v2": "~2.6.0",
     "acc-sdk-common-v2": "~2.0.0",
     "google-libphonenumber": "^3.2.35",
     "unfetch": "~4.2.0"
diff --git a/packages/client/src/client-common/context.ts b/packages/client/src/client-common/context.ts
index e88c322..ddc49b5 100644
--- a/packages/client/src/client-common/context.ts
+++ b/packages/client/src/client-common/context.ts
@@ -3,13 +3,13 @@ import { SupportedNetwork, SupportedNetworkArray } from "./interfaces/common";
 import { InvalidAddressError, UnsupportedProtocolError, UnsupportedNetworkError } from "acc-sdk-common-v2";
 import { getNetwork } from "../utils/Utilty";
 import { LIVE_CONTRACTS } from "./constants";
-export { ContextParams } from "./interfaces/context";
 
 import { isAddress } from "@ethersproject/address";
 import { Network } from "@ethersproject/networks";
 import { JsonRpcProvider, Networkish } from "@ethersproject/providers";
 import { AddressZero } from "@ethersproject/constants";
 import { Wallet } from "@ethersproject/wallet";
+export { ContextParams } from "./interfaces/context";
 
 const supportedProtocols = ["https:", "http:"];
 // if (typeof process !== "undefined" && process.env?.TESTING) {
diff --git a/packages/client/src/utils/ContractUtils.ts b/packages/client/src/utils/ContractUtils.ts
index 50eebad..9d29c33 100644
--- a/packages/client/src/utils/ContractUtils.ts
+++ b/packages/client/src/utils/ContractUtils.ts
@@ -560,6 +560,37 @@ export class ContractUtils {
         return arrayify(keccak256(encodedResult));
     }
 
+    public static async getPurchaseSignature(
+        signer: Signer,
+        purchase: {
+            purchaseId: string;
+            amount: BigNumberish;
+            loyalty: BigNumberish;
+            currency: string;
+            shopId: BytesLike;
+            account: string;
+            phone: BytesLike;
+            sender: string;
+        },
+        chainId: BigNumberish
+    ): Promise<string> {
+        const encodedData = defaultAbiCoder.encode(
+            ["string", "uint256", "uint256", "string", "bytes32", "address", "bytes32", "address", "uint256"],
+            [
+                purchase.purchaseId,
+                purchase.amount,
+                purchase.loyalty,
+                purchase.currency,
+                purchase.shopId,
+                purchase.account,
+                purchase.phone,
+                purchase.sender,
+                chainId
+            ]
+        );
+        return signer.signMessage(arrayify(keccak256(encodedData)));
+    }
+
     public static async signMessage(signer: Signer, message: Uint8Array): Promise<string> {
         return signer.signMessage(message);
     }
diff --git a/packages/client/test/history/shop.test.ts b/packages/client/test/history/shop.test.ts
index 40e62a9..58a3d33 100644
--- a/packages/client/test/history/shop.test.ts
+++ b/packages/client/test/history/shop.test.ts
@@ -102,18 +102,28 @@ describe("Integrated test of Shop", () => {
                 const loyaltyAmount = purchaseAmount.mul(5).div(100);
                 const phoneHash = ContractUtils.getPhoneHash("");
                 const foundation = await accounts[AccountIndex.FOUNDATION].getAddress();
-                const purchaseParams = users.map((m) => {
-                    return {
-                        purchaseId: NodeInfo.getPurchaseId(),
-                        amount: purchaseAmount,
-                        loyalty: loyaltyAmount,
-                        currency: "php",
-                        shopId: shops[0].shopId,
-                        account: m.address,
-                        phone: phoneHash,
-                        sender: foundation
-                    };
-                });
+
+                const purchaseParams = await Promise.all(
+                    users.map(async (m) => {
+                        const purchaseItem = {
+                            purchaseId: NodeInfo.getPurchaseId(),
+                            amount: purchaseAmount,
+                            loyalty: loyaltyAmount,
+                            currency: "php",
+                            shopId: shops[0].shopId,
+                            account: m.address,
+                            phone: phoneHash,
+                            sender: foundation,
+                            signature: ""
+                        };
+                        purchaseItem.signature = await ContractUtils.getPurchaseSignature(
+                            accounts[AccountIndex.FOUNDATION],
+                            purchaseItem,
+                            NodeInfo.getChainId()
+                        );
+                        return purchaseItem;
+                    })
+                );
                 const purchaseMessage = ContractUtils.getPurchasesMessage(0, purchaseParams, NodeInfo.getChainId());
                 const signatures = await Promise.all(
                     validatorWallets.map((m) => ContractUtils.signMessage(m, purchaseMessage))
diff --git a/packages/client/test/methods/ledger.test.ts b/packages/client/test/methods/ledger.test.ts
index caabb05..1463569 100644
--- a/packages/client/test/methods/ledger.test.ts
+++ b/packages/client/test/methods/ledger.test.ts
@@ -166,8 +166,14 @@ describe("Ledger", () => {
             shopId: shopData[purchaseData[0].shopIndex].shopId,
             account: AddressZero,
             phone: phoneHash,
-            sender: await accounts[AccountIndex.FOUNDATION].getAddress()
+            sender: await accounts[AccountIndex.FOUNDATION].getAddress(),
+            signature: ""
         };
+        purchaseParams.signature = await ContractUtils.getPurchaseSignature(
+            accounts[AccountIndex.FOUNDATION],
+            purchaseParams,
+            NodeInfo.getChainId()
+        );
         const purchaseMessage = ContractUtils.getPurchasesMessage(0, [purchaseParams], NodeInfo.getChainId());
         const signatures = await Promise.all(
             validatorWallets.map((m) => ContractUtils.signMessage(m, purchaseMessage))
@@ -195,8 +201,14 @@ describe("Ledger", () => {
             shopId: shopData[purchaseData[0].shopIndex].shopId,
             account: userAddress,
             phone: phoneHash,
-            sender: await accounts[AccountIndex.FOUNDATION].getAddress()
+            sender: await accounts[AccountIndex.FOUNDATION].getAddress(),
+            signature: ""
         };
+        purchaseParams.signature = await ContractUtils.getPurchaseSignature(
+            accounts[AccountIndex.FOUNDATION],
+            purchaseParams,
+            NodeInfo.getChainId()
+        );
         const purchaseMessage = ContractUtils.getPurchasesMessage(0, [purchaseParams], NodeInfo.getChainId());
         const signatures = await Promise.all(
             validatorWallets.map((m) => ContractUtils.signMessage(m, purchaseMessage))
diff --git a/packages/client/test/methods/shop_refund.test.ts b/packages/client/test/methods/shop_refund.test.ts
index e3ebeba..c27f87b 100644
--- a/packages/client/test/methods/shop_refund.test.ts
+++ b/packages/client/test/methods/shop_refund.test.ts
@@ -214,8 +214,14 @@ describe("Shop Withdrawal", () => {
                 shopId: shopData[purchase.shopIndex].shopId,
                 account: userAccount,
                 phone: phoneHash,
-                sender: await accounts[AccountIndex.FOUNDATION].getAddress()
+                sender: await accounts[AccountIndex.FOUNDATION].getAddress(),
+                signature: ""
             };
+            purchaseParams.signature = await ContractUtils.getPurchaseSignature(
+                accounts[AccountIndex.FOUNDATION],
+                purchaseParams,
+                NodeInfo.getChainId()
+            );
             const purchaseMessage = ContractUtils.getPurchasesMessage(0, [purchaseParams], NodeInfo.getChainId());
             const signatures = await Promise.all(
                 validatorWallets.map((m) => ContractUtils.signMessage(m, purchaseMessage))
diff --git a/yarn.lock b/yarn.lock
index 256fcc8..cb66592 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1968,10 +1968,10 @@ abbrev@^2.0.0:
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-2.0.0.tgz#cf59829b8b4f03f89dda2771cb7f3653828c89bf"
   integrity sha512-6/mh1E2u2YgEsCHdY0Yx5oW+61gZU+1vXaoiHHrpKeuRNNgFvS+/jrwHiQhB5apAf5oB7UB7E19ol2R2LKH8hQ==
 
-acc-contracts-lib-v2@~2.5.0:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/acc-contracts-lib-v2/-/acc-contracts-lib-v2-2.5.0.tgz#2a1cfa376c5915e3a11545fcdc954376bbeec578"
-  integrity sha512-EUhHCcwAYAsjw4LE2zf2MbtdMiI8Ugk80LoNEg3eJGpnFr5w1BT2nIoAgIKkK1H5znSXk7UVpngjeyv2xkLhKA==
+acc-contracts-lib-v2@~2.6.0:
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/acc-contracts-lib-v2/-/acc-contracts-lib-v2-2.6.0.tgz#a6adb0fb19c7b3fe7120abeef71d492a1ca57540"
+  integrity sha512-7hJc/wwh+xgCDHXEznbMCxRVaMHTpW7s1bkbgBAkKBdvtH/aiiP39dB3rEUx4I4fG4OnH9JIcMZ9VXmrdgUaaQ==
   dependencies:
     ethers "5.7.0"