git ssb

1
const Vertex = require('merkle-trie')
2
const Store = require('merkle-trie/store')
3
const U256 = require('./deps/u256.js')
4
const Address = require('./deps/address.js')
5
const Block = require('./deps/block.js')
6
// TODO remove fakeblockchain
7
const fakeBlockChain = require('./fakeBlockChain.js')
8
9
module.exports = class Environment {
10
  constructor (data = {}) {
11
    const defaults = {
12
      block: new Block(),
13
      blockchain: fakeBlockChain,
14
      // gas tank
15
      gasPrice: 0,
16
      gasLeft: 1000000,
17
      gasRefund: 0,
18
      // call infromation
19
      address: new Address('0x0000000000000000000000000000000000000000'),
20
      origin: new Address('0x0000000000000000000000000000000000000000'),
21
      caller: new Address('0x0000000000000000000000000000000000000000'),
22
      callValue: new U256(0),
23
      callData: new Uint8Array(),
24
      // the ROM
25
      code: new Uint8Array(), // the current running code
26
      // output calls
27
      logs: [],
28
      selfDestruct: false,
29
      selfDestructAddress: new Address('0x0000000000000000000000000000000000000000'),
30
      // more output calls
31
      returnValue: new Uint8Array(),
32
      state: new Vertex({store: new Store()})
33
    }
34
    // this.environment.addAccount(identityContract, {})
35
    // this.environment.addAccount(meteringContract, {})
36
    // this.environment.addAccount(transcompilerContract, {})
37
38
    Object.assign(this, defaults, data)
39
  }
40
41
  // addAccount (address, trie) {
42
  //   let account = new Vertex()
43
  //   account.set('nonce', trie.nonce || new U256(0))
44
  //   account.set('balance', trie.balance || new U256(0))
45
  //   account.set('code', trie.code || new Uint8Array())
46
  //   account.set('storage', trie.storage || new Map())
47
  //   this.state.set(address.toString(), account)
48
  // }
49
50
  isAccountPresent (address) {
51
    // const account = this.state.get(address.toString())
52
    // if (account) {
53
    //   return true
54
    // } else {
55
    //   return false
56
    // }
57
  }
58
59
  getBalance (address) {
60
    // const account = this.state.get(address.toString())
61
    // if (account) {
62
    //   return account.get('balance')
63
    // } else {
64
    //   return new U256()
65
    // }
66
  }
67
68
  getCode (address) {
69
    // const account = this.state.get(address.toString())
70
    // if (account) {
71
    //   return account.get('code')
72
    // } else {
73
    //   return Uint8Array.from(new Buffer([]))
74
    // }
75
  }
76
77
  async getBlockHash (height) {
78
    const block = await this.blockchain.getBlock(height)
79
    return block.hash()
80
  }
81
82
  set createHandler (value) {
83
    this.createhandler = value
84
  }
85
86
  set callHandler (value) {
87
    this.callhandler = value
88
  }
89
90
  // kernal
91
  create (code, value) {
92
    // STUB
93
    return [ 1, Address.zero() ]
94
  }
95
96
  call (gas, address, value, data) {
97
    // FIXME: create a child environment here
98
    const ret = this.root.messagehandler({
99
      from: this.address,
100
      to: address,
101
      gasLimit: gas,
102
      value: value,
103
      data: data
104
    })
105
    return [ !!ret.executionOutcome, ret.returnValue ]
106
  }
107
108
  callCode (gas, address, value, data) {
109
    // STUB
110
    return [ 1, new Uint8Array() ]
111
  }
112
113
  delegateCall (gas, address, data) {
114
    // STUB
115
    return [ 1, new Uint8Array() ]
116
  }
117
}
118