diff --git a/package.json b/package.json
index 477e32c..76926a2 100644
--- a/package.json
+++ b/package.json
@@ -34,10 +34,12 @@
     "@metamask/eth-sig-util": "^4.0.1",
     "crypto-js": "^4.2.0",
     "ethereumjs-util": "^7.1.5",
+    "node-fetch": "2",
     "redis": "^3.1.2",
     "web3": "^1.7.4"
   },
   "devDependencies": {
+    "@types/node-fetch": "^2.6.11",
     "@types/redis": "^2.8.28",
     "@typescript-eslint/eslint-plugin": "^6.19.0",
     "@typescript-eslint/parser": "^6.19.0",
diff --git a/src/utils/date.util.ts b/src/utils/date.util.ts
index 6dd7c23..f5e7d64 100644
--- a/src/utils/date.util.ts
+++ b/src/utils/date.util.ts
@@ -28,3 +28,28 @@ export function daysBetween(date1: Date, date2: Date) {
   const diffInDays = Math.round(diffInMs / ONE_DAY)
   return diffInDays
 }
+
+// get begin of one day
+export const getDayBegin = (date: Date): Date => {
+  const year = date.getFullYear()
+  const month = date.getMonth()
+  const day = date.getDate()
+  return new Date(year, month, day)
+}
+
+// get begin of n day ago
+export const getNDayAgo = (n: number, begin: boolean): Date => {
+  const date = new Date(Date.now() - n * 24 * 60 * 60 * 1000)
+  if (begin) {
+    return getDayBegin(date)
+  } else {
+    return date
+  }
+}
+
+// get begin of this month
+export const getMonthBegin = (date: Date): Date => {
+  const year = date.getFullYear()
+  const month = date.getMonth()
+  return new Date(year, month, 1)
+}
\ No newline at end of file
diff --git a/src/utils/net.util.ts b/src/utils/net.util.ts
index e44b113..db81717 100644
--- a/src/utils/net.util.ts
+++ b/src/utils/net.util.ts
@@ -1,4 +1,5 @@
 import { ZError } from 'common/ZError'
+import fetch, { Response, RequestInit } from 'node-fetch'
 
 const TIMEOUT_ERROR = new Error('timeout')
 
diff --git a/yarn.lock b/yarn.lock
index 396c660..5a8a264 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -626,6 +626,14 @@
   dependencies:
     "@types/node" "*"
 
+"@types/node-fetch@^2.6.11":
+  version "2.6.11"
+  resolved "https://registry.yarnpkg.com/@types/node-fetch/-/node-fetch-2.6.11.tgz#9b39b78665dae0e82a08f02f4967d62c66f95d24"
+  integrity sha512-24xFj9R5+rfQJLRyM56qh+wnVSYhyXC2tkoBndtY0U+vubqNsYXGjufB2nn8Q6gt0LrARwL6UBtMCSVCwl4B1g==
+  dependencies:
+    "@types/node" "*"
+    form-data "^4.0.0"
+
 "@types/node@*":
   version "20.11.4"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-20.11.4.tgz#c724a5d6723182af758b91b994209336f4439cb7"
@@ -1161,7 +1169,7 @@ color-name@~1.1.4:
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
   integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
 
-combined-stream@^1.0.6, combined-stream@~1.0.6:
+combined-stream@^1.0.6, combined-stream@^1.0.8, combined-stream@~1.0.6:
   version "1.0.8"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.8.tgz#c3d45a8b34fd730631a110a8a2520682b31d5a7f"
   integrity sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==
@@ -1791,6 +1799,15 @@ form-data-encoder@1.7.1:
   resolved "https://registry.yarnpkg.com/form-data-encoder/-/form-data-encoder-1.7.1.tgz#ac80660e4f87ee0d3d3c3638b7da8278ddb8ec96"
   integrity sha512-EFRDrsMm/kyqbTQocNvRXMLjc7Es2Vk+IQFx/YW7hkUH1eBl4J1fqiP34l74Yt0pFLCNpc06fkbVk00008mzjg==
 
+form-data@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/form-data/-/form-data-4.0.0.tgz#93919daeaf361ee529584b9b31664dc12c9fa452"
+  integrity sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww==
+  dependencies:
+    asynckit "^0.4.0"
+    combined-stream "^1.0.8"
+    mime-types "^2.1.12"
+
 form-data@~2.3.2:
   version "2.3.3"
   resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.3.3.tgz#dcce52c05f644f298c6a7ab936bd724ceffbf3a6"
@@ -2567,7 +2584,7 @@ node-addon-api@^2.0.0:
   resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-2.0.2.tgz#432cfa82962ce494b132e9d72a15b29f71ff5d32"
   integrity sha512-Ntyt4AIXyaLIuMHF6IOoTakB3K+RWxwtsHNRxllEoA6vPwP9o4866g6YWDLUdnucilZhmkxiHwHr11gAENw+QA==
 
-node-fetch@^2.6.12:
+node-fetch@2, node-fetch@^2.6.12:
   version "2.7.0"
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.7.0.tgz#d0f0fa6e3e2dc1d27efcd8ad99d550bda94d187d"
   integrity sha512-c4FRfUm/dbcWZ7U+1Wq0AwCyFL+3nt2bEw05wfxSz+DWpWsitgmSgYmy2dQdWyKC1694ELPqMs/YzUSNozLt8A==