forked from holographxyz/holograph-protocol
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathBase64.sol
164 lines (133 loc) · 7.13 KB
/
Base64.sol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
// SPDX-License-Identifier: UNLICENSED
/*
┌───────────┐
│ HOLOGRAPH │
└───────────┘
╔═════════════════════════════════════════════════════════════╗
║ ║
║ / ^ \ ║
║ ~~*~~ ¸ ║
║ [ '<>:<>' ] │░░░ ║
║ ╔╗ _/"\_ ╔╣ ║
║ ┌─╬╬─┐ """ ┌─╬╬─┐ ║
║ ┌─┬┘ ╠╣ └┬─┐ \_/ ┌─┬┘ ╠╣ └┬─┐ ║
║ ┌─┬┘ │ ╠╣ │ └┬─┐ ┌─┬┘ │ ╠╣ │ └┬─┐ ║
║ ┌─┬┘ │ │ ╠╣ │ │ └┬─┐ ┌─┬┘ │ │ ╠╣ │ │ └┬─┐ ║
║ ┌─┬┘ │ │ │ ╠╣ │ │ │ └┬┐ ┌┬┘ │ │ │ ╠╣ │ │ │ └┬─┐ ║
╠┬┘ │ │ │ │ ╠╣ │ │ │ │└¤┘│ │ │ │ ╠╣ │ │ │ │ └┬╣
║│ │ │ │ │ ╠╣ │ │ │ │ │ │ │ │ ╠╣ │ │ │ │ │║
╠╩══╩══╩══╩══╩══╬╬══╩══╩══╩══╩═══╩══╩══╩══╩══╬╬══╩══╩══╩══╩══╩╣
╠┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴╬╬┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴╬╬┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴╣
║ ╠╣ ╠╣ ║
║ ╠╣ ╠╣ ║
║ , ╠╣ , ,' * ╠╣ ║
║~~~~~^~~~~~~~~┌╬╬┐~~~^~~~~~~~~^^~~~~~~~~^~~┌╬╬┐~~~~~~~^~~~~~~║
╚══════════════╩╩╩╩═════════════════════════╩╩╩╩══════════════╝
- one protocol, one bridge = infinite possibilities -
***************************************************************
DISCLAIMER: U.S Patent Pending
LICENSE: Holograph Limited Public License (H-LPL)
https://holograph.xyz/licenses/h-lpl/1.0.0
This license governs use of the accompanying software. If you
use the software, you accept this license. If you do not accept
the license, you are not permitted to use the software.
1. Definitions
The terms "reproduce," "reproduction," "derivative works," and
"distribution" have the same meaning here as under U.S.
copyright law. A "contribution" is the original software, or
any additions or changes to the software. A "contributor" is
any person that distributes its contribution under this
license. "Licensed patents" are a contributor’s patent claims
that read directly on its contribution.
2. Grant of Rights
A) Copyright Grant- Subject to the terms of this license,
including the license conditions and limitations in sections 3
and 4, each contributor grants you a non-exclusive, worldwide,
royalty-free copyright license to reproduce its contribution,
prepare derivative works of its contribution, and distribute
its contribution or any derivative works that you create.
B) Patent Grant- Subject to the terms of this license,
including the license conditions and limitations in section 3,
each contributor grants you a non-exclusive, worldwide,
royalty-free license under its licensed patents to make, have
made, use, sell, offer for sale, import, and/or otherwise
dispose of its contribution in the software or derivative works
of the contribution in the software.
3. Conditions and Limitations
A) No Trademark License- This license does not grant you rights
to use any contributors’ name, logo, or trademarks.
B) If you bring a patent claim against any contributor over
patents that you claim are infringed by the software, your
patent license from such contributor is terminated with
immediate effect.
C) If you distribute any portion of the software, you must
retain all copyright, patent, trademark, and attribution
notices that are present in the software.
D) If you distribute any portion of the software in source code
form, you may do so only under this license by including a
complete copy of this license with your distribution. If you
distribute any portion of the software in compiled or object
code form, you may only do so under a license that complies
with this license.
E) The software is licensed “as-is.” You bear all risks of
using it. The contributors give no express warranties,
guarantees, or conditions. You may have additional consumer
rights under your local laws which this license cannot change.
To the extent permitted under your local laws, the contributors
exclude all implied warranties, including those of
merchantability, fitness for a particular purpose and
non-infringement.
4. (F) Platform Limitation- The licenses granted in sections
2.A & 2.B extend only to the software or derivative works that
you create that run on a Holograph system product.
***************************************************************
*/
pragma solidity 0.8.13;
library Base64 {
bytes private constant base64stdchars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
bytes private constant base64urlchars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
function encode(string memory _str) internal pure returns (string memory) {
bytes memory _bs = bytes(_str);
return encode(_bs);
}
function encode(bytes memory _bs) internal pure returns (string memory) {
uint256 rem = _bs.length % 3;
uint256 res_length = ((_bs.length + 2) / 3) * 4 - ((3 - rem) % 3);
bytes memory res = new bytes(res_length);
uint256 i = 0;
uint256 j = 0;
for (; i + 3 <= _bs.length; i += 3) {
(res[j], res[j + 1], res[j + 2], res[j + 3]) = encode3(uint8(_bs[i]), uint8(_bs[i + 1]), uint8(_bs[i + 2]));
j += 4;
}
if (rem != 0) {
uint8 la0 = uint8(_bs[_bs.length - rem]);
uint8 la1 = 0;
if (rem == 2) {
la1 = uint8(_bs[_bs.length - 1]);
}
(bytes1 b0, bytes1 b1, bytes1 b2 /* bytes1 b3*/, ) = encode3(la0, la1, 0);
res[j] = b0;
res[j + 1] = b1;
if (rem == 2) {
res[j + 2] = b2;
}
}
return string(res);
}
function encode3(
uint256 a0,
uint256 a1,
uint256 a2
) private pure returns (bytes1 b0, bytes1 b1, bytes1 b2, bytes1 b3) {
uint256 n = (a0 << 16) | (a1 << 8) | a2;
uint256 c0 = (n >> 18) & 63;
uint256 c1 = (n >> 12) & 63;
uint256 c2 = (n >> 6) & 63;
uint256 c3 = (n) & 63;
b0 = base64urlchars[c0];
b1 = base64urlchars[c1];
b2 = base64urlchars[c2];
b3 = base64urlchars[c3];
}
}