git ssb

1
const constants = require('./constants.js')
2
const U256 = require('./u256.js')
3
4
module.exports = class Environment {
5
  constructor (data) {
6
    const defaults = {
7
      // gas tank
8
      gasPrice: 0,
9
      gasLimit: 1000000, // The gas limit for the block
10
      gasRefund: 0,
11
      // call infromation
12
      address: new Uint8Array(constants.ADDRESS_SIZE_BYTES),
13
      origin: new Uint8Array(constants.ADDRESS_SIZE_BYTES),
14
      coinbase: new Uint8Array(constants.ADDRESS_SIZE_BYTES),
15
      difficulty: 0,
16
      caller: new Uint8Array(constants.ADDRESS_SIZE_BYTES),
17
      callValue: new U256(0),
18
      callData: new ArrayBuffer(),
19
      // the ROM
20
      code: new ArrayBuffer(), // the current running code
21
      // output calls
22
      logs: [],
23
      selfDestructAddress: new ArrayBuffer(),
24
      // more output calls
25
      returnValue: new ArrayBuffer()
26
    }
27
28
    const self = this
29
    this.state = new Map()
30
31
    if (data) {
32
      data = JSON.parse(data)
33
    } else {
34
      data = {}
35
    }
36
37
    Object.assign(this, defaults, data)
38
    if (data.accounts) {
39
      data.accounts.forEach((account) => {
40
        self.state.set(new Uint8Array(account[0]).toString(), account[1])
41
      })
42
    }
43
44
    if (data.address) {
45
      this.address = new Uint8Array(data.address)
46
    }
47
48
    if (data.origin) {
49
      this.origin = new Uint8Array(data.origin)
50
    }
51
52
    if (data.caller) {
53
      this.caller = new Uint8Array(data.caller)
54
    }
55
56
    if (data.callValue) {
57
      this.callValue = new Uint8Array(data.callValue)
58
    }
59
60
    if (data.callData) {
61
      this.callData = hexStr2arrayBuf(data.callData)
62
    }
63
  }
64
65
  getBalance (address) {
66
    return this.state.get(address.toString()).balance
67
  }
68
69
  getCode (address) {
70
    // STUB
71
  }
72
73
  getBlockHash (height) {
74
    // STUB
75
  }
76
77
  // kernal
78
  create (code, value) {
79
    // STUB
80
  }
81
82
  call (gas, address, value, data) {
83
    // STUB
84
    return // result
85
  }
86
87
  delegateCall (gas, address, data) {
88
    // STUB
89
    return // result
90
  }
91
}
92
93
function hexStr2arrayBuf (string) {
94
  const ab = new ArrayBuffer(string.length / 2)
95
  const view = new Uint8Array(ab)
96
  string = [...string]
97
  let temp = ''
98
  string.forEach((el, i) => {
99
    temp += el
100
    if (i % 2) {
101
      view[(i + 1) / 2 - 1] = parseInt(temp, 16)
102
      temp = ''
103
    }
104
  })
105
  return ab
106
}
107