Files: b9423af2cd45a86722df9ab973b4db265a8fcaa3 / systemObjects.js
2129 bytesRaw
1 | const cbor = require('borc') |
2 | |
3 | const TAGS = { |
4 | id: 41, |
5 | link: 42, |
6 | func: 43, |
7 | mod: 44 |
8 | } |
9 | |
10 | const DEFAULTS = { |
11 | elem: [], |
12 | data: Buffer.from([]), |
13 | id: new cbor.Tagged(TAGS.id, 0), |
14 | mod: new cbor.Tagged(TAGS.mod, [{}, new cbor.Tagged(TAGS.id, 0)]), |
15 | link: {'/': null}, |
16 | func: new cbor.Tagged(TAGS.func, 0) |
17 | } |
18 | |
19 | const decoder = new cbor.Decoder({ |
20 | tags: { |
21 | [TAGS.id]: val => new ID(val), |
22 | [TAGS.func]: val => new FunctionRef(...val), |
23 | [TAGS.mod]: val => new ModuleRef(...val) |
24 | } |
25 | }) |
26 | |
27 | class Serializable { |
28 | serialize () { |
29 | const encoder = new cbor.Encoder() |
30 | this.encodeCBOR(encoder) |
31 | return encoder.finalize() |
32 | } |
33 | |
34 | static deserialize (serialized) { |
35 | return decoder.decodeFirst(serialized) |
36 | } |
37 | } |
38 | |
39 | class FunctionRef extends Serializable { |
40 | constructor (opts) { |
41 | super() |
42 | this.private = opts.private |
43 | this.identifier = opts.identifier |
44 | if (!(opts.id instanceof ID)) { |
45 | opts.id = new ID(opts.id) |
46 | } |
47 | this.destId = opts.id |
48 | this.params = opts.params |
49 | this.gas = opts.gas |
50 | } |
51 | |
52 | encodeCBOR (gen) { |
53 | return gen.write(new cbor.Tagged(TAGS.func, [ |
54 | this.private, |
55 | this.identifier, |
56 | this.params, |
57 | this.destId |
58 | ])) |
59 | } |
60 | |
61 | set container (container) { |
62 | this._container = container |
63 | } |
64 | } |
65 | |
66 | class ModuleRef extends Serializable { |
67 | constructor (ex, id) { |
68 | super() |
69 | this.exports = ex |
70 | this.id = id |
71 | } |
72 | |
73 | getFuncRef (name) { |
74 | return new FunctionRef({ |
75 | private: false, |
76 | identifier: name, |
77 | params: this.exports[name], |
78 | id: this.id |
79 | }) |
80 | } |
81 | |
82 | encodeCBOR (gen) { |
83 | return gen.write(new cbor.Tagged(TAGS.mod, [this.exports, this.id])) |
84 | } |
85 | |
86 | static fromMetaJSON (json, id) { |
87 | const exports = {} |
88 | for (const ex in json.exports) { |
89 | const type = json.types[json.indexes[json.exports[ex].toString()]].params |
90 | exports[ex] = type |
91 | } |
92 | return new ModuleRef(exports, id) |
93 | } |
94 | } |
95 | |
96 | class ID extends Serializable { |
97 | constructor (id) { |
98 | super() |
99 | this.id = id |
100 | } |
101 | |
102 | encodeCBOR (gen) { |
103 | return gen.write(new cbor.Tagged(TAGS.id, this.id)) |
104 | } |
105 | } |
106 | |
107 | module.exports = { |
108 | ID, |
109 | FunctionRef, |
110 | ModuleRef, |
111 | DEFAULTS |
112 | } |
113 |
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