path: root/core/vm_env.go

package core

import (
    "math/big"

    "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
    msg   Message
    depth int
    chain *ChainManager
    typ   vm.Type
}

func NewEnv(state *state.StateDB, chain *ChainManager, msg Message, block *types.Block) *VMEnv {
    return &VMEnv{
        chain: chain,
        state: state,
        block: block,
        msg:   msg,
        typ:   vm.StdVmTy,
    }
}

func (self *VMEnv) Origin() []byte        { return self.msg.From() }
func (self *VMEnv) BlockNumber() *big.Int { return self.block.Number() }
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) GasLimit() *big.Int    { return self.block.GasLimit() }
func (self *VMEnv) Value() *big.Int       { return self.msg.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) VmType() vm.Type       { return self.typ }
func (self *VMEnv) SetVmType(t vm.Type)   { self.typ = t }
func (self *VMEnv) GetHash(n uint64) []byte {
    if block := self.chain.GetBlockByNumber(n); block != nil {
        return block.Hash()
    }

    return nil
}
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) *Execution {
    return NewExecution(self, addr, data, gas, price, value)
}

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

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