git ssb

1
const Graph = require('generic-digraph')
2
const MAX_BAL_BYTES = require('./constants.js').MAX_BAL_BYTES
3
4
module.exports = class Environment {
5
  constructor (data) {
6
    const defaults = {
7
      // gas tank
8
      gasCounter: 0, // TODO: gasCounter is only 53 bits
9
      gas: 0, // The amount of gas this contract has
10
      gasPrice: 0,
11
      gasLimit: 0, // The gas limit for the block
12
      // call infromation
13
      address: new Uint8Array(20),
14
      origin: new Uint8Array(20),
15
      coinbase: new Uint8Array(20),
16
      difficulty: new Uint8Array(20),
17
      caller: new Uint8Array(20),
18
      callValue: new Uint8Array(MAX_BAL_BYTES),
19
      callData: new ArrayBuffer(),
20
      // the ROM
21
      code: new ArrayBuffer(), // the current running code
22
      // output calls
23
      logs: [],
24
      suicideAddress: new ArrayBuffer(),
25
      // more output calls
26
      returnValue: new ArrayBuffer()
27
    }
28
29
    this.state = new Graph()
30
31
    if (data) {
32
      data = JSON.parse(data)
33
      Object.assign(this, defaults, data)
34
    } else {
35
      data = {}
36
    }
37
38
    if (data.accounts) {
39
      this.accounts = new Graph()
40
      const self = this
41
      data.accounts.forEach((account) => {
42
        self.accounts.set(new Uint8Array(account[0]).toString(), account[1])
43
      })
44
    }
45
46
    if (data.address) {
47
      this.address = new Uint8Array(data.address)
48
    }
49
50
    if (data.origin) {
51
      this.origin = new Uint8Array(data.origin)
52
    }
53
54
    if (data.caller) {
55
      this.caller = new Uint8Array(data.caller)
56
    }
57
58
    if (data.callValue) {
59
      this.callValue = new Uint8Array(data.callValue)
60
    }
61
62
    if (data.callData) {
63
      this.callData = hexStr2arrayBuf(data.callData)
64
    }
65
  }
66
67
  getBalance (address) {
68
    return this.accounts.getValue(address.toString()).balance
69
  }
70
71
  getCode (address) {
72
    // STUB
73
  }
74
75
  getBlockHash (height) {
76
    // STUB
77
  }
78
79
  // kernal
80
  create (code, value) {
81
    // STUB
82
  }
83
84
  call (gas, address, value, data) {
85
    // STUB
86
    return // result
87
  }
88
89
  delegateCall (gas, address, data) {
90
    // STUB
91
    return // result
92
  }
93
}
94
95
function hexStr2arrayBuf (string) {
96
  const ab = new ArrayBuffer(string.length / 2)
97
  const view = new Uint8Array(ab)
98
  string = [...string]
99
  let temp = ''
100
  string.forEach((el, i) => {
101
    temp += el
102
    if (i % 2) {
103
      view[(i + 1) / 2 - 1] = parseInt(temp, 16)
104
      temp = ''
105
    }
106
  })
107
  return ab
108
}
109