git ssb

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: new cbor.Tagged(TAGS.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({
23
      identifier: val[0],
24
      params: val[1],
25
      id: val[2],
26
      gas: val[3]
27
    }),
28
    [TAGS.mod]: val => new ModuleRef(...val),
29
    [TAGS.link]: val => {
30
      return {
31
        '/': val
32
      }
33
    }
34
  }
35
})
36
37
class FunctionRef {
38
  constructor (opts) {
39
    this.identifier = opts.identifier
40
    this.destId = opts.id
41
    this.params = opts.params
42
    this.gas = opts.gas || 0
43
  }
44
45
  encodeCBOR (gen) {
46
    return gen.write(new cbor.Tagged(TAGS.func, [
47
      this.identifier,
48
      this.params,
49
      this.destId,
50
      this.gas
51
    ]))
52
  }
53
}
54
55
class ModuleRef {
56
  constructor (ex, id) {
57
    this.exports = ex
58
    this.id = id
59
  }
60
61
  getFuncRef (name) {
62
    return new FunctionRef({
63
      identifier: [false, name],
64
      params: this.exports[name],
65
      id: this.id
66
    })
67
  }
68
69
  encodeCBOR (gen) {
70
    return gen.write(new cbor.Tagged(TAGS.mod, [this.exports, this.id]))
71
  }
72
}
73
74
class ID {
75
  constructor (id) {
76
    this.id = id
77
  }
78
79
  encodeCBOR (gen) {
80
    return gen.write(new cbor.Tagged(TAGS.id, this.id))
81
  }
82
}
83
84
module.exports = {
85
  ID,
86
  FunctionRef,
87
  ModuleRef,
88
  DEFAULTS,
89
  decoder
90
}
91