From 0df2291872d6ab0e4322847ad9c549a4fb519ce0 Mon Sep 17 00:00:00 2001
From: Adam R <13562139+catenocrypt@users.noreply.github.com>
Date: Tue, 29 Sep 2020 15:01:34 +0200
Subject: [PATCH] [internal] Simplify eth-address handling, smaller dependency
 (#4200)

* Simplify eth-address handling, smaller dependency

* Remove web3 dependency

Co-authored-by: Catenocrypt <catenocrypt@users.noreply.github.com>
---
 package-lock.json                             | 2372 -----------------
 package.json                                  |    3 +-
 .../generic/{eth-web3.ts => eth-address.ts}   |   20 +-
 script/generic/eth-forks.ts                   |    2 +-
 test/index.test.ts                            |   14 +-
 5 files changed, 27 insertions(+), 2384 deletions(-)
 rename script/generic/{eth-web3.ts => eth-address.ts} (62%)

diff --git a/package-lock.json b/package-lock.json
index c742423ac..91524a901 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -513,161 +513,6 @@
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-          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-          "dev": true,
-          "requires": {
-            "ms": "2.0.0"
-          }
-        }
-      }
-    },
     "whatwg-encoding": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",
@@ -11184,85 +8891,12 @@
       "integrity": "sha512-D3RuNkynyHmEJIpD2qrgVkc9DQ23OrN/moAwZX4L8DfvszsJxpjQuUq3LMx6HoYji9fbIOBY18XWBsAux1ZZUA==",
       "dev": true
     },
-    "xhr": {
-      "version": "2.5.0",
-      "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.5.0.tgz",
-      "integrity": "sha512-4nlO/14t3BNUZRXIXfXe+3N6w3s1KoxcJUUURctd64BLRe67E4gRwp4PjywtDY72fXpZ1y6Ch0VZQRY/gMPzzQ==",
-      "dev": true,
-      "requires": {
-        "global": "~4.3.0",
-        "is-function": "^1.0.1",
-        "parse-headers": "^2.0.0",
-        "xtend": "^4.0.0"
-      }
-    },
-    "xhr-request": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/xhr-request/-/xhr-request-1.1.0.tgz",
-      "integrity": "sha512-Y7qzEaR3FDtL3fP30k9wO/e+FBnBByZeybKOhASsGP30NIkRAAkKD/sCnLvgEfAIEC1rcmK7YG8f4oEnIrrWzA==",
-      "dev": true,
-      "requires": {
-        "buffer-to-arraybuffer": "^0.0.5",
-        "object-assign": "^4.1.1",
-        "query-string": "^5.0.1",
-        "simple-get": "^2.7.0",
-        "timed-out": "^4.0.1",
-        "url-set-query": "^1.0.0",
-        "xhr": "^2.0.4"
-      },
-      "dependencies": {
-        "decompress-response": {
-          "version": "3.3.0",
-          "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-3.3.0.tgz",
-          "integrity": "sha1-gKTdMjdIOEv6JICDYirt7Jgq3/M=",
-          "dev": true,
-          "requires": {
-            "mimic-response": "^1.0.0"
-          }
-        },
-        "mimic-response": {
-          "version": "1.0.1",
-          "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-1.0.1.tgz",
-          "integrity": "sha512-j5EctnkH7amfV/q5Hgmoal1g2QHFJRraOtmx0JpIqkxhBhI/lJSl1nMpQ45hVarwNETOoWEimndZ4QK0RHxuxQ==",
-          "dev": true
-        },
-        "simple-get": {
-          "version": "2.8.1",
-          "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-2.8.1.tgz",
-          "integrity": "sha512-lSSHRSw3mQNUGPAYRqo7xy9dhKmxFXIjLjp4KHpf99GEH2VH7C3AM+Qfx6du6jhfUi6Vm7XnbEVEf7Wb6N8jRw==",
-          "dev": true,
-          "requires": {
-            "decompress-response": "^3.3.0",
-            "once": "^1.3.1",
-            "simple-concat": "^1.0.0"
-          }
-        }
-      }
-    },
-    "xhr-request-promise": {
-      "version": "0.1.3",
-      "resolved": "https://registry.npmjs.org/xhr-request-promise/-/xhr-request-promise-0.1.3.tgz",
-      "integrity": "sha512-YUBytBsuwgitWtdRzXDDkWAXzhdGB8bYm0sSzMPZT7Z2MBjMSTHFsyCT1yCRATY+XC69DUrQraRAEgcoCRaIPg==",
-      "dev": true,
-      "requires": {
-        "xhr-request": "^1.1.0"
-      }
-    },
     "xhr2": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/xhr2/-/xhr2-0.1.4.tgz",
       "integrity": "sha1-f4dliEdxbbUCYyOBL4GMras4el8=",
       "dev": true
     },
-    "xhr2-cookies": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/xhr2-cookies/-/xhr2-cookies-1.1.0.tgz",
-      "integrity": "sha1-fXdEnQmZGX8VXLc7I99yUF7YnUg=",
-      "dev": true,
-      "requires": {
-        "cookiejar": "^2.1.1"
-      }
-    },
     "xml-name-validator": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
@@ -11293,12 +8927,6 @@
       "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
       "dev": true
     },
-    "yaeti": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/yaeti/-/yaeti-0.0.6.tgz",
-      "integrity": "sha1-8m9ITXJoTPQr7ft2lwqhYI+/lXc=",
-      "dev": true
-    },
     "yallist": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
diff --git a/package.json b/package.json
index dbc1a8d60..17062aa5e 100644
--- a/package.json
+++ b/package.json
@@ -55,8 +55,7 @@
     "tinify": "^1.6.0-beta.2",
     "ts-jest": "^25.5.1",
     "ts-node": "^8.10.2",
-    "typescript": "^3.9.7",
-    "web3": "^1.2.11"
+    "typescript": "^3.9.7"
   },
   "dependencies": {
     "codecov": "^3.7.2"
diff --git a/script/generic/eth-web3.ts b/script/generic/eth-address.ts
similarity index 62%
rename from script/generic/eth-web3.ts
rename to script/generic/eth-address.ts
index c6854b333..a2185fe48 100644
--- a/script/generic/eth-web3.ts
+++ b/script/generic/eth-address.ts
@@ -1,9 +1,8 @@
+import { toChecksumAddress, checkAddressChecksum } from "ethereum-checksum-address";
 import { reverseCase } from "./types";
 
-const web3 = new (require('web3'))('ws://localhost:8546');
-
-export const isChecksumEthereum = (address: string): boolean => web3.utils.checkAddressChecksum(address);
-export const toChecksumEthereum = (address: string): string => web3.utils.toChecksumAddress(address);
+export const isChecksumEthereum = (address: string): boolean => checkAddressChecksum(address);
+export const toChecksumEthereum = (address: string): string => toChecksumAddress(address);
 
 export function toChecksum(address: string, chain = "ethereum"): string {
     const checksumEthereum = toChecksumEthereum(address);
@@ -28,5 +27,16 @@ export function isChecksum(address: string, chain = "ethereum"): boolean {
 }
 
 export function isEthereumAddress(address: string): boolean {
-    return web3.utils.isAddress(address)
+    if (!(address.length == 40 || (address.length == 42 && address.substring(0, 2) === '0x'))) {
+        return false;
+    }
+    try {
+        const check1 = toChecksum(address);
+        if (toChecksum(check1) !== check1) {
+            return false;
+        }
+        return true;
+    } catch (error) {
+        return false;
+    }
 }
diff --git a/script/generic/eth-forks.ts b/script/generic/eth-forks.ts
index a5c06732c..0a33789a0 100644
--- a/script/generic/eth-forks.ts
+++ b/script/generic/eth-forks.ts
@@ -19,7 +19,7 @@ import {
     readDirSync,
     isPathExistsSync,
 } from "../generic/filesystem";
-import { toChecksum } from "../generic/eth-web3";
+import { toChecksum } from "../generic/eth-address";
 import { ActionInterface, CheckStepInterface } from "../generic/interface";
 import { isAssetInfoOK } from "../generic/asset-info";
 import * as bluebird from "bluebird";
diff --git a/test/index.test.ts b/test/index.test.ts
index 7f56aa22f..f09f75b15 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -6,7 +6,7 @@ import {
     isChecksum,
     toChecksum,
     isEthereumAddress
-} from "../script/generic/eth-web3";
+} from "../script/generic/eth-address";
 import {
     isDimensionTooLarge,
     isDimensionOK,
@@ -22,11 +22,13 @@ import {
 } from "../script/generic/types";
 import { findImagesToFetch } from "../script/blockchain/binance";
 
-describe("Test eth-web3 helpers", () => {
+describe("Test eth-address helpers", () => {
     test(`Test isChecksum`, () => {
         expect(isChecksum("0x7Bb09bC8aDE747178e95B1D035ecBeEBbB18cFee", "ethereum"), `checksum`).toBe(true);
         expect(isChecksum("0x7bb09bc8ade747178e95b1d035ecbeebbb18cfee", "ethereum"), `lowercase`).toBe(false);
         expect(isChecksum("0x7Bb09bC8aDE747178e95B1D035ecBe", "ethereum"), `too short`).toBe(false);
+        expect(isChecksum("7Bb09bC8aDE747178e95B1D035ecBeEBbB18cFee", "ethereum"), `checksum, no prefix`).toBe(true);
+        expect(isChecksum("7bb09bc8ade747178e95b1d035ecbeebbb18cfee", "ethereum"), `lowercase, no prefix`).toBe(false);
         expect(isChecksum("0x7Bb09bC8aDE747178e95B1D035ecBeEBbB18cFee", "wanchain"), `wanchain wrong checksum`).toBe(false);
         expect(isChecksum("0x7bb09bc8ade747178e95b1d035ecbeebbb18cfee", "wanchain"), `wanchain lowercase`).toBe(false);
         expect(isChecksum("0x7bB09Bc8Ade747178E95b1d035ECbEebBb18CfEE", "wanchain"), `wanchain checksum`).toBe(true);
@@ -34,11 +36,15 @@ describe("Test eth-web3 helpers", () => {
     test(`Test toChecksum`, () => {
         expect(toChecksum("0x7bb09bc8ade747178e95b1d035ecbeebbb18cfee", "ethereum"), `from lowercase`).toEqual("0x7Bb09bC8aDE747178e95B1D035ecBeEBbB18cFee");
         expect(toChecksum("0x7Bb09bC8aDE747178e95B1D035ecBeEBbB18cFee", "ethereum"), `from checksum`).toEqual("0x7Bb09bC8aDE747178e95B1D035ecBeEBbB18cFee");
+        expect(toChecksum("7bb09bc8ade747178e95b1d035ecbeebbb18cfee", "ethereum"), `from lowercase, no prefix`).toEqual("0x7Bb09bC8aDE747178e95B1D035ecBeEBbB18cFee");
         expect(toChecksum("0x7bb09bc8ade747178e95b1d035ecbeebbb18cfee", "wanchain"), `wanchain, from lowercase`).toEqual("0x7bB09Bc8Ade747178E95b1d035ECbEebBb18CfEE");
     });
     test(`Test isEthereumAddress`, () => {
-        expect(isEthereumAddress("0x7bb09bc8ade747178e95b1d035ecbeebbb18cfee")).toBe(true);
-        expect(isEthereumAddress("b09bc8ade747178e95b1d035ecbeebbb18cfee")).toBe(false);
+        expect(isEthereumAddress("0x7bb09bc8ade747178e95b1d035ecbeebbb18cfee"), `valid, lowercase`).toBe(true);
+        expect(isEthereumAddress("0x7Bb09bC8aDE747178e95B1D035ecBeEBbB18cFee"), `valid, checksum`).toBe(true);
+        expect(isEthereumAddress("b09bc8ade747178e95b1d035ecbeebbb18cfee"), `invalid, short`).toBe(false);
+        expect(isEthereumAddress("7bb09bc8ade747178e95b1d035ecbeebbb18cfee"), `valid, no prefix`).toBe(true);
+        expect(isEthereumAddress("0x7bb09bc8qde747178e95b1d035ecbeebbb18cfee"), `invalid, length ok, invalid char`).toBe(false);
     });
 });