72 lines
1.7 KiB
Go
72 lines
1.7 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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}
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func NewContract(Amount *big.Int, root []byte) *Contract {
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contract := &Contract{Amount: Amount, Nonce: 0}
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contract.state = ethutil.NewTrie(ethutil.Config.Db, string(root))
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return contract
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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.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 = ethutil.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface())
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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.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.Update(string(addr), string(ethutil.NewValue(value).Encode()))
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}
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func (c *Contract) State() *ethutil.Trie {
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return c.state
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}
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func (c *Contract) GetMem(num int) *ethutil.Value {
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nb := ethutil.BigToBytes(big.NewInt(int64(num)), 256)
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return c.Addr(nb)
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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(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.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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