path: root/cmd/utils/vm_env.go

package utils

import (
    "math/big"

    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/state"
    "github.com/ethereum/go-ethereum/vm"
)

type VMEnv struct {
    state *state.StateDB
    block *types.Block

    transactor []byte
    value      *big.Int

    depth int
    Gas   *big.Int
}

func NewEnv(state *state.StateDB, block *types.Block, transactor []byte, value *big.Int) *VMEnv {
    return &VMEnv{
        state:      state,
        block:      block,
        transactor: transactor,
        value:      value,
    }
}

func (self *VMEnv) Origin() []byte        { return self.transactor }
func (self *VMEnv) BlockNumber() *big.Int { return self.block.Number() }
func (self *VMEnv) PrevHash() []byte      { return self.block.ParentHash() }
func (self *VMEnv) Coinbase() []byte      { return self.block.Coinbase() }
func (self *VMEnv) Time() int64           { return self.block.Time() }
func (self *VMEnv) Difficulty() *big.Int  { return self.block.Difficulty() }
func (self *VMEnv) BlockHash() []byte     { return self.block.Hash() }
func (self *VMEnv) GasLimit() *big.Int    { return self.block.GasLimit() }
func (self *VMEnv) Value() *big.Int       { return self.value }
func (self *VMEnv) State() *state.StateDB { return self.state }
func (self *VMEnv) Depth() int            { return self.depth }
func (self *VMEnv) SetDepth(i int)        { self.depth = i }
func (self *VMEnv) AddLog(log state.Log) {
    self.state.AddLog(log)
}
func (self *VMEnv) Transfer(from, to vm.Account, amount *big.Int) error {
    return vm.Transfer(from, to, amount)
}

func (self *VMEnv) vm(addr, data []byte, gas, price, value *big.Int) *core.Execution {
    return core.NewExecution(self, addr, data, gas, price, value)
}

func (self *VMEnv) Call(caller vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
    exe := self.vm(addr, data, gas, price, value)
    ret, err := exe.Call(addr, caller)
    self.Gas = exe.Gas

    return ret, err
}
func (self *VMEnv) CallCode(caller vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
    exe := self.vm(caller.Address(), data, gas, price, value)
    return exe.Call(addr, caller)
}

func (self *VMEnv) Create(caller vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ClosureRef) {
    exe := self.vm(addr, data, gas, price, value)
    return exe.Create(caller)
}