From 4d6b8414dc10b51f5c180e143b4ee8520f306764 Mon Sep 17 00:00:00 2001
From: BenRey <br@massa.net>
Date: Thu, 12 Sep 2024 23:45:11 +0200
Subject: [PATCH] Remove big-varint lib

---
 jest.browser.config.js            |  1 -
 jest.config.ts                    |  1 -
 package-lock.json                 |  6 ----
 package.json                      |  1 -
 src/operation/big-varint.ts       | 60 +++++++++++++++++++++++++++++++
 src/operation/operationManager.ts |  2 +-
 6 files changed, 61 insertions(+), 10 deletions(-)
 create mode 100644 src/operation/big-varint.ts

diff --git a/jest.browser.config.js b/jest.browser.config.js
index 37dd9b27..1b7620a6 100644
--- a/jest.browser.config.js
+++ b/jest.browser.config.js
@@ -10,5 +10,4 @@ module.exports = {
     ],
     '^.+\\.jsx?$': 'babel-jest',
   },
-  transformIgnorePatterns: ['node_modules/(?!(big-varint)/)'],
 }
diff --git a/jest.config.ts b/jest.config.ts
index 889ef4ef..3f8d99d3 100644
--- a/jest.config.ts
+++ b/jest.config.ts
@@ -13,7 +13,6 @@ const config: Config.InitialOptions = {
   },
   testMatch: ['<rootDir>/test/**/*.(spec|test).ts?(x)'],
   testPathIgnorePatterns: ['<rootDir>/node_modules/', '<rootDir>/dist/'],
-  transformIgnorePatterns: ['/node_modules/(?!big-varint).+\\.js$'],
 }
 
 export default config
diff --git a/package-lock.json b/package-lock.json
index 99196e73..c6809028 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,6 @@
                 "@noble/hashes": "^1.2.0",
                 "@open-rpc/client-js": "^1.8.1",
                 "@open-rpc/schema-utils-js": "1.15.0",
-                "big-varint": "^0.1.3",
                 "bs58check": "^4.0.0",
                 "decimal.js": "^10.4.3",
                 "dotenv": "^16.0.3",
@@ -4190,11 +4189,6 @@
                 "node": ">=10.0.0"
             }
         },
-        "node_modules/big-varint": {
-            "version": "0.1.3",
-            "resolved": "https://registry.npmjs.org/big-varint/-/big-varint-0.1.3.tgz",
-            "integrity": "sha512-HgJQG8DtWAaYtrXTCasQukrMO0jbtQpd4BPEjr+JHoLRrbyIr8IxrMp01OZVJCoZBdqGynGHvp2iz0mabXz6dA=="
-        },
         "node_modules/bl": {
             "version": "4.1.0",
             "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
diff --git a/package.json b/package.json
index 00728899..c63ac9d5 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,6 @@
         "@noble/hashes": "^1.2.0",
         "@open-rpc/client-js": "^1.8.1",
         "@open-rpc/schema-utils-js": "1.15.0",
-        "big-varint": "^0.1.3",
         "bs58check": "^4.0.0",
         "decimal.js": "^10.4.3",
         "dotenv": "^16.0.3",
diff --git a/src/operation/big-varint.ts b/src/operation/big-varint.ts
new file mode 100644
index 00000000..56f79b25
--- /dev/null
+++ b/src/operation/big-varint.ts
@@ -0,0 +1,60 @@
+/* eslint-disable @typescript-eslint/no-magic-numbers */
+// This code was taken from the lib big-varint. https://github.com/joeltg/big-varint/blob/65346e5688245b20f05e5ce2dd8c784eb3ae3e15/src/unsigned.ts#L1C1-L58C2
+const LIMIT = 0x7fn
+
+export function encodingLength(value: bigint): number {
+  let i = 0
+
+  for (; value >= 0x80n; i++) {
+    value >>= 7n
+  }
+
+  return i + 1
+}
+
+export function encode(
+  i: bigint,
+  buffer?: ArrayBuffer,
+  byteOffset?: number
+): Uint8Array {
+  if (i < 0n) {
+    throw new RangeError('value must be unsigned')
+  }
+
+  const byteLength = encodingLength(i)
+  buffer = buffer || new ArrayBuffer(byteLength)
+  byteOffset = byteOffset || 0
+  if (buffer.byteLength < byteOffset + byteLength) {
+    throw new RangeError(
+      'the buffer is too small to encode the number at the offset'
+    )
+  }
+
+  const array = new Uint8Array(buffer, byteOffset)
+
+  let offset = 0
+  while (LIMIT < i) {
+    array[offset++] = Number(i & LIMIT) | 0x80
+    i >>= 7n
+  }
+
+  array[offset] = Number(i)
+
+  return array
+}
+
+export function decode(data: Uint8Array, offset = 0): bigint {
+  let i = 0n
+  let n = 0
+  let b: number
+  do {
+    b = data[offset + n]
+    if (b === undefined) {
+      throw new RangeError('offset out of range')
+    }
+
+    i += BigInt(b & 0x7f) << BigInt(n * 7)
+    n++
+  } while (0x80 <= b)
+  return i
+}
diff --git a/src/operation/operationManager.ts b/src/operation/operationManager.ts
index addeae6e..e84f4ce8 100644
--- a/src/operation/operationManager.ts
+++ b/src/operation/operationManager.ts
@@ -1,4 +1,4 @@
-import { unsigned } from 'big-varint'
+import * as unsigned from './big-varint'
 import { Address } from '../basicElements/address'
 import { PrivateKey, PublicKey } from '../basicElements/keys'
 import { PublicAPI } from '../client'