-
Notifications
You must be signed in to change notification settings - Fork 55
/
Script.ts
280 lines (240 loc) · 7.57 KB
/
Script.ts
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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
import * as Cardano from '../../Cardano';
import * as Crypto from '@cardano-sdk/crypto';
import { CborReader, CborWriter } from '../CBOR';
import { HexBlob, InvalidStateError } from '@cardano-sdk/util';
import { NativeScript } from './NativeScript';
import { PlutusV1Script, PlutusV2Script, PlutusV3Script } from './PlutusScript';
import { ScriptLanguage } from './ScriptLanguage';
const SCRIPT_SUBGROUP = 2;
/** Program that decides whether the transaction that spends the output is authorized to do so. */
export class Script {
#nativeScript: NativeScript | undefined;
#plutusV1: PlutusV1Script | undefined;
#plutusV2: PlutusV2Script | undefined;
#plutusV3: PlutusV3Script | undefined;
#language: ScriptLanguage;
#originalBytes: HexBlob | undefined = undefined;
/**
* Serializes a Script into CBOR format.
*
* @returns The Script in CBOR format.
*/
toCbor(): HexBlob {
if (this.#originalBytes) return this.#originalBytes;
// CDDL
// script = [ 0, native_script // 1, plutus_v1_script // 2, plutus_v2_script // 3, plutus_v3_script ]
const writer = new CborWriter();
let cbor;
switch (this.#language) {
case ScriptLanguage.Native:
cbor = this.#nativeScript!.toCbor();
break;
case ScriptLanguage.PlutusV1:
cbor = this.#plutusV1!.toCbor();
break;
case ScriptLanguage.PlutusV2:
cbor = this.#plutusV2!.toCbor();
break;
case ScriptLanguage.PlutusV3:
cbor = this.#plutusV3!.toCbor();
break;
default:
throw new InvalidStateError(`Unexpected language value: ${this.#language}`);
}
writer.writeStartArray(SCRIPT_SUBGROUP);
writer.writeInt(this.#language);
writer.writeEncodedValue(Buffer.from(cbor, 'hex'));
return writer.encodeAsHex();
}
/**
* Deserializes the Script from a CBOR byte array.
*
* @param cbor The CBOR encoded Script object.
* @returns The new Script instance.
*/
static fromCbor(cbor: HexBlob): Script {
let script: Script;
const reader = new CborReader(cbor);
reader.readStartArray();
const language = Number(reader.readInt());
const innerScript = HexBlob.fromBytes(reader.readEncodedValue());
switch (language) {
case ScriptLanguage.Native:
script = Script.newNativeScript(NativeScript.fromCbor(innerScript));
break;
case ScriptLanguage.PlutusV1:
script = Script.newPlutusV1Script(PlutusV1Script.fromCbor(innerScript));
break;
case ScriptLanguage.PlutusV2:
script = Script.newPlutusV2Script(PlutusV2Script.fromCbor(innerScript));
break;
case ScriptLanguage.PlutusV3:
script = Script.newPlutusV3Script(PlutusV3Script.fromCbor(innerScript));
break;
default:
throw new InvalidStateError(`Unexpected language value: ${language}`);
}
script.#originalBytes = cbor;
return script;
}
/**
* Creates a Core Script object from the current Script object.
*
* @returns The Core Script object.
*/
toCore(): Cardano.Script {
let core;
switch (this.#language) {
case ScriptLanguage.Native:
core = this.#nativeScript!.toCore();
break;
case ScriptLanguage.PlutusV1:
core = this.#plutusV1!.toCore();
break;
case ScriptLanguage.PlutusV2:
core = this.#plutusV2!.toCore();
break;
case ScriptLanguage.PlutusV3:
core = this.#plutusV3!.toCore();
break;
default:
throw new InvalidStateError(`Unexpected language: ${this.#language}`);
}
return core;
}
/**
* Creates a Script object from the given Core Script object.
*
* @param coreScript The core Script object.
*/
static fromCore(coreScript: Cardano.Script): Script {
let script: Script;
if (Cardano.isNativeScript(coreScript)) {
script = Script.newNativeScript(NativeScript.fromCore(coreScript));
} else {
switch (coreScript.version) {
case Cardano.PlutusLanguageVersion.V1:
script = Script.newPlutusV1Script(PlutusV1Script.fromCore(coreScript));
break;
case Cardano.PlutusLanguageVersion.V2:
script = Script.newPlutusV2Script(PlutusV2Script.fromCore(coreScript));
break;
case Cardano.PlutusLanguageVersion.V3:
script = Script.newPlutusV3Script(PlutusV3Script.fromCore(coreScript));
break;
default:
throw new InvalidStateError('Unexpected Plutus language version'); // Shouldn't happen.
}
}
return script;
}
/**
* Gets the script language.
*
* @returns the Script language.
*/
language(): ScriptLanguage {
return this.#language;
}
/**
* Gets a Script from a NativeScript instance.
*
* @param nativeScript The NativeScript instance to 'cast' to Script.
*/
static newNativeScript(nativeScript: NativeScript): Script {
const script = new Script();
script.#nativeScript = nativeScript;
script.#language = ScriptLanguage.Native;
return script;
}
/**
* Gets a Script from a PlutusV1 instance.
*
* @param plutusV1Script The PlutusV1Script instance to 'cast' to Script.
*/
static newPlutusV1Script(plutusV1Script: PlutusV1Script): Script {
const script = new Script();
script.#plutusV1 = plutusV1Script;
script.#language = ScriptLanguage.PlutusV1;
return script;
}
/**
* Gets a Script from a PlutusV2 instance.
*
* @param plutusV2Script The PlutusV2Script instance to 'cast' to Script.
*/
static newPlutusV2Script(plutusV2Script: PlutusV2Script): Script {
const script = new Script();
script.#plutusV2 = plutusV2Script;
script.#language = ScriptLanguage.PlutusV2;
return script;
}
/**
* Gets a Script from a PlutusV3 instance.
*
* @param plutusV3Script The PlutusV3Script instance to 'cast' to Script.
*/
static newPlutusV3Script(plutusV3Script: PlutusV3Script): Script {
const script = new Script();
script.#plutusV3 = plutusV3Script;
script.#language = ScriptLanguage.PlutusV3;
return script;
}
/**
* Gets a NativeScript from a Script instance.
*
* @returns a NativeScript if the script can be down cast, otherwise, undefined.
*/
asNative(): NativeScript | undefined {
return this.#nativeScript;
}
/**
* Gets a PlutusV1Script from a Script instance.
*
* @returns a PlutusV1Script if the script can be down cast, otherwise, undefined.
*/
asPlutusV1(): PlutusV1Script | undefined {
return this.#plutusV1;
}
/**
* Gets a PlutusV2Script from a Script instance.
*
* @returns a PlutusV2Script if the script can be down cast, otherwise, undefined.
*/
asPlutusV2(): PlutusV2Script | undefined {
return this.#plutusV2;
}
/**
* Gets a PlutusV3Script from a Script instance.
*
* @returns a PlutusV3Script if the script can be down cast, otherwise, undefined.
*/
asPlutusV3(): PlutusV3Script | undefined {
return this.#plutusV3;
}
/**
* Computes the script hash of this script.
*
* @returns the script hash.
*/
hash(): Crypto.Hash28ByteBase16 {
let hash;
switch (this.#language) {
case ScriptLanguage.Native:
hash = this.#nativeScript!.hash();
break;
case ScriptLanguage.PlutusV1:
hash = this.#plutusV1!.hash();
break;
case ScriptLanguage.PlutusV2:
hash = this.#plutusV2!.hash();
break;
case ScriptLanguage.PlutusV3:
hash = this.#plutusV3!.hash();
break;
default:
throw new InvalidStateError(`Unexpected script language ${this.#language}`); // Shouldn't happen.
}
return hash;
}
}