104 lines
2.5 KiB
Go
104 lines
2.5 KiB
Go
package ethchain
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import (
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"github.com/ethereum/eth-go/ethutil"
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"math/big"
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)
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type Contract struct {
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Amount *big.Int
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Nonce uint64
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//state *ethutil.Trie
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state *State
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address []byte
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script []byte
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}
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func NewContract(address []byte, Amount *big.Int, root []byte) *Contract {
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contract := &Contract{address: address, Amount: Amount, Nonce: 0}
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contract.state = NewState(ethutil.NewTrie(ethutil.Config.Db, string(root)))
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return contract
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}
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func NewContractFromBytes(address, data []byte) *Contract {
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contract := &Contract{address: address}
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contract.RlpDecode(data)
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return contract
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}
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func (c *Contract) Addr(addr []byte) *ethutil.Value {
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return ethutil.NewValueFromBytes([]byte(c.state.trie.Get(string(addr))))
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}
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func (c *Contract) SetAddr(addr []byte, value interface{}) {
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c.state.trie.Update(string(addr), string(ethutil.NewValue(value).Encode()))
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}
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func (c *Contract) State() *State {
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return c.state
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}
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func (c *Contract) GetMem(num *big.Int) *ethutil.Value {
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nb := ethutil.BigToBytes(num, 256)
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return c.Addr(nb)
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}
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func (c *Contract) GetInstr(pc *big.Int) *ethutil.Value {
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if int64(len(c.script)-1) < pc.Int64() {
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return ethutil.NewValue(0)
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}
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return ethutil.NewValueFromBytes([]byte{c.script[pc.Int64()]})
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}
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func (c *Contract) SetMem(num *big.Int, val *ethutil.Value) {
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addr := ethutil.BigToBytes(num, 256)
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c.state.trie.Update(string(addr), string(val.Encode()))
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}
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// Return the gas back to the origin. Used by the Virtual machine or Closures
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func (c *Contract) ReturnGas(val *big.Int, state *State) {
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c.Amount.Add(c.Amount, val)
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}
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func (c *Contract) Address() []byte {
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return c.address
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}
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func (c *Contract) RlpEncode() []byte {
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return ethutil.Encode([]interface{}{c.Amount, c.Nonce, c.state.trie.Root})
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}
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func (c *Contract) RlpDecode(data []byte) {
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decoder := ethutil.NewValueFromBytes(data)
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c.Amount = decoder.Get(0).BigInt()
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c.Nonce = decoder.Get(1).Uint()
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c.state = NewState(ethutil.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface()))
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}
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func MakeContract(tx *Transaction, state *State) *Contract {
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// Create contract if there's no recipient
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if tx.IsContract() {
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addr := tx.Hash()[12:]
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value := tx.Value
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contract := NewContract(addr, value, []byte(""))
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state.trie.Update(string(addr), string(contract.RlpEncode()))
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for i, val := range tx.Data {
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if len(val) > 0 {
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bytNum := ethutil.BigToBytes(big.NewInt(int64(i)), 256)
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contract.state.trie.Update(string(bytNum), string(ethutil.Encode(val)))
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}
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}
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state.trie.Update(string(addr), string(contract.RlpEncode()))
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return contract
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}
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return nil
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}
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