Simplify base58 dependency tree (#624)

packages/util-crypto/package.json

@@ -32,7 +32,6 @@
     "bip39": "^3.0.2",
     "blakejs": "^1.1.0",
     "bn.js": "^5.1.2",
-    "bs58": "^4.0.1",
     "elliptic": "^6.5.3",
     "js-sha3": "^0.8.0",
     "pbkdf2": "^3.1.1",
@@ -41,7 +40,6 @@
   },
   "devDependencies": {
     "@types/bn.js": "^4.11.6",
-    "@types/bs58": "^4.0.1",
     "@types/elliptic": "^6.4.12",
     "@types/pbkdf2": "^3.0.0",
     "@types/xxhashjs": "^0.2.2"

packages/util-crypto/src/base58/bs58.ts

@@ -0,0 +1,15 @@
+// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import baseX from 'base-x';
+
+// https://github.com/cryptocoinjs/base-x#alphabets
+const BASE58_ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
+
+const bs58 = baseX(BASE58_ALPHABET);
+
+export {
+  BASE58_ALPHABET,
+  bs58
+};

packages/util-crypto/src/base58/decode.ts

@@ -2,11 +2,9 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import bs58 from 'bs58';
 import { bufferToU8a } from '@polkadot/util';
 
-// copied from bs58
-const BASE58_ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
+import { BASE58_ALPHABET, bs58 } from './bs58';
 
 /**
  * @name base58Decode

packages/util-crypto/src/base58/encode.ts

@@ -2,9 +2,10 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
-import bs58 from 'bs58';
 import { u8aToBuffer, u8aToU8a } from '@polkadot/util';
 
+import { bs58 } from './bs58';
+
 /**
  * @name base58Encode
  * @summary Creates a base58 value.

yarn.lock

@@ -2770,7 +2770,6 @@ __metadata:
     "@polkadot/util": 2.17.0-beta.0
     "@polkadot/wasm-crypto": ^1.2.1
     "@types/bn.js": ^4.11.6
-    "@types/bs58": ^4.0.1
     "@types/elliptic": ^6.4.12
     "@types/pbkdf2": ^3.0.0
     "@types/xxhashjs": ^0.2.2
@@ -2778,7 +2777,6 @@ __metadata:
     bip39: ^3.0.2
     blakejs: ^1.1.0
     bn.js: ^5.1.2
-    bs58: ^4.0.1
     elliptic: ^6.5.3
     js-sha3: ^0.8.0
     pbkdf2: ^3.1.1
@@ -2893,15 +2891,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/bs58@npm:^4.0.1":
-  version: 4.0.1
-  resolution: "@types/bs58@npm:4.0.1"
-  dependencies:
-    base-x: ^3.0.6
-  checksum: 3/0fc89f90f50c3b86aa633fbb12dad0a37a2b2aff5e6ec50995ebce9d88f768a950afbbc43c7e1a10943a0991374892924346218f3dd0d7dfad108e09bc564a2f
-  languageName: node
-  linkType: hard
-
 "@types/chrome@npm:^0.0.117":
   version: 0.0.117
   resolution: "@types/chrome@npm:0.0.117"
@@ -4580,7 +4569,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"base-x@npm:^3.0.2, base-x@npm:^3.0.6, base-x@npm:^3.0.8":
+"base-x@npm:^3.0.8":
   version: 3.0.8
   resolution: "base-x@npm:3.0.8"
   dependencies:
@@ -4939,15 +4928,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"bs58@npm:^4.0.1":
-  version: 4.0.1
-  resolution: "bs58@npm:4.0.1"
-  dependencies:
-    base-x: ^3.0.2
-  checksum: 3/0da897a0e527b31ec0fd7ce4d84a86278196acb4fa4f5010dce38a7b83b8b0bbe26909843878c2aa32bdbe00b93a68408d42c74a1cfaa05ca64f29bd5dff4187
-  languageName: node
-  linkType: hard
-
 "bser@npm:2.1.1":
   version: 2.1.1
   resolution: "bser@npm:2.1.1"