Separated the VM from the block manager and added states
This commit is contained in:
obscuren
parent
3a45cdeaf9
commit
377c995103
56
ethchain/state.go
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56
ethchain/state.go
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@ -0,0 +1,56 @@
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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 State struct {
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trie *ethutil.Trie
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}
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func NewState(trie *ethutil.Trie) *State {
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return &State{trie: trie}
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}
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func (s *State) GetContract(addr []byte) *Contract {
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data := s.trie.Get(string(addr))
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if data == "" {
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return nil
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}
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contract := &Contract{}
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contract.RlpDecode([]byte(data))
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return contract
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}
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func (s *State) UpdateContract(addr []byte, contract *Contract) {
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s.trie.Update(string(addr), string(contract.RlpEncode()))
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}
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func Compile(code []string) (script []string) {
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script = make([]string, len(code))
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for i, val := range code {
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instr, _ := ethutil.CompileInstr(val)
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script[i] = string(instr)
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}
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return
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}
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func (s *State) GetAccount(addr []byte) (account *Address) {
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data := s.trie.Get(string(addr))
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if data == "" {
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account = NewAddress(big.NewInt(0))
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} else {
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account = NewAddressFromData([]byte(data))
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}
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return
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}
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func (s *State) UpdateAccount(addr []byte, account *Address) {
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s.trie.Update(string(addr), string(account.RlpEncode()))
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}
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437
ethchain/vm.go
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437
ethchain/vm.go
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@ -0,0 +1,437 @@
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package ethchain
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import (
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"bytes"
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"fmt"
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"github.com/ethereum/eth-go/ethutil"
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"github.com/obscuren/secp256k1-go"
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"log"
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"math"
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"math/big"
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)
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type Vm struct {
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txPool *TxPool
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// Stack for processing contracts
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stack *Stack
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// non-persistent key/value memory storage
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mem map[string]*big.Int
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vars RuntimeVars
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}
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type RuntimeVars struct {
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address []byte
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blockNumber uint64
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sender []byte
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prevHash []byte
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coinbase []byte
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time int64
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diff *big.Int
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txValue *big.Int
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txData []string
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}
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func (vm *Vm) Process(contract *Contract, state *State, vars RuntimeVars) {
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vm.mem = make(map[string]*big.Int)
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vm.stack = NewStack()
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addr := vars.address // tx.Hash()[12:]
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// Instruction pointer
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pc := 0
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if contract == nil {
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fmt.Println("Contract not found")
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return
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}
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Pow256 := ethutil.BigPow(2, 256)
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if ethutil.Config.Debug {
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fmt.Printf("# op\n")
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}
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stepcount := 0
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totalFee := new(big.Int)
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out:
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for {
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stepcount++
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// The base big int for all calculations. Use this for any results.
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base := new(big.Int)
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val := contract.GetMem(pc)
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//fmt.Printf("%x = %d, %v %x\n", r, len(r), v, nb)
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op := OpCode(val.Uint())
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var fee *big.Int = new(big.Int)
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var fee2 *big.Int = new(big.Int)
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if stepcount > 16 {
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fee.Add(fee, StepFee)
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}
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// Calculate the fees
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switch op {
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case oSSTORE:
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y, x := vm.stack.Peekn()
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val := contract.Addr(ethutil.BigToBytes(x, 256))
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if val.IsEmpty() && len(y.Bytes()) > 0 {
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fee2.Add(DataFee, StoreFee)
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} else {
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fee2.Sub(DataFee, StoreFee)
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}
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case oSLOAD:
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fee.Add(fee, StoreFee)
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case oEXTRO, oBALANCE:
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fee.Add(fee, ExtroFee)
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case oSHA256, oRIPEMD160, oECMUL, oECADD, oECSIGN, oECRECOVER, oECVALID:
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fee.Add(fee, CryptoFee)
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case oMKTX:
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fee.Add(fee, ContractFee)
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}
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tf := new(big.Int).Add(fee, fee2)
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if contract.Amount.Cmp(tf) < 0 {
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fmt.Println("Contract fee", ContractFee)
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fmt.Println("Insufficient fees to continue running the contract", tf, contract.Amount)
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break
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}
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// Add the fee to the total fee. It's subtracted when we're done looping
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totalFee.Add(totalFee, tf)
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if ethutil.Config.Debug {
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fmt.Printf("%-3d %-4s", pc, op.String())
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}
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switch op {
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case oSTOP:
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fmt.Println("")
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break out
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case oADD:
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x, y := vm.stack.Popn()
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// (x + y) % 2 ** 256
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base.Add(x, y)
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base.Mod(base, Pow256)
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// Pop result back on the stack
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vm.stack.Push(base)
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case oSUB:
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x, y := vm.stack.Popn()
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// (x - y) % 2 ** 256
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base.Sub(x, y)
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base.Mod(base, Pow256)
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// Pop result back on the stack
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vm.stack.Push(base)
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case oMUL:
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x, y := vm.stack.Popn()
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// (x * y) % 2 ** 256
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base.Mul(x, y)
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base.Mod(base, Pow256)
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// Pop result back on the stack
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vm.stack.Push(base)
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case oDIV:
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x, y := vm.stack.Popn()
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// floor(x / y)
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base.Div(x, y)
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// Pop result back on the stack
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vm.stack.Push(base)
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case oSDIV:
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x, y := vm.stack.Popn()
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// n > 2**255
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if x.Cmp(Pow256) > 0 {
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x.Sub(Pow256, x)
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}
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if y.Cmp(Pow256) > 0 {
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y.Sub(Pow256, y)
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}
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z := new(big.Int)
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z.Div(x, y)
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if z.Cmp(Pow256) > 0 {
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z.Sub(Pow256, z)
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}
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// Push result on to the stack
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vm.stack.Push(z)
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case oMOD:
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x, y := vm.stack.Popn()
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base.Mod(x, y)
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vm.stack.Push(base)
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case oSMOD:
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x, y := vm.stack.Popn()
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// n > 2**255
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if x.Cmp(Pow256) > 0 {
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x.Sub(Pow256, x)
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}
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if y.Cmp(Pow256) > 0 {
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y.Sub(Pow256, y)
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}
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z := new(big.Int)
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z.Mod(x, y)
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if z.Cmp(Pow256) > 0 {
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z.Sub(Pow256, z)
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}
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// Push result on to the stack
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vm.stack.Push(z)
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case oEXP:
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x, y := vm.stack.Popn()
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base.Exp(x, y, Pow256)
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vm.stack.Push(base)
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case oNEG:
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base.Sub(Pow256, vm.stack.Pop())
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vm.stack.Push(base)
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case oLT:
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x, y := vm.stack.Popn()
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// x < y
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if x.Cmp(y) < 0 {
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vm.stack.Push(ethutil.BigTrue)
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} else {
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vm.stack.Push(ethutil.BigFalse)
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}
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case oLE:
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x, y := vm.stack.Popn()
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// x <= y
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if x.Cmp(y) < 1 {
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vm.stack.Push(ethutil.BigTrue)
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} else {
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vm.stack.Push(ethutil.BigFalse)
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}
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case oGT:
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x, y := vm.stack.Popn()
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// x > y
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if x.Cmp(y) > 0 {
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vm.stack.Push(ethutil.BigTrue)
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} else {
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vm.stack.Push(ethutil.BigFalse)
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}
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case oGE:
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x, y := vm.stack.Popn()
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// x >= y
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if x.Cmp(y) > -1 {
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vm.stack.Push(ethutil.BigTrue)
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} else {
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vm.stack.Push(ethutil.BigFalse)
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}
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case oNOT:
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x, y := vm.stack.Popn()
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// x != y
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if x.Cmp(y) != 0 {
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vm.stack.Push(ethutil.BigTrue)
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} else {
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vm.stack.Push(ethutil.BigFalse)
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}
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case oMYADDRESS:
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vm.stack.Push(ethutil.BigD(addr))
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case oTXSENDER:
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vm.stack.Push(ethutil.BigD(vars.sender))
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case oTXVALUE:
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vm.stack.Push(vars.txValue)
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case oTXDATAN:
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vm.stack.Push(big.NewInt(int64(len(vars.txData))))
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case oTXDATA:
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v := vm.stack.Pop()
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// v >= len(data)
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if v.Cmp(big.NewInt(int64(len(vars.txData)))) >= 0 {
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vm.stack.Push(ethutil.Big("0"))
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} else {
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vm.stack.Push(ethutil.Big(vars.txData[v.Uint64()]))
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}
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case oBLK_PREVHASH:
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vm.stack.Push(ethutil.BigD(vars.prevHash))
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case oBLK_COINBASE:
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vm.stack.Push(ethutil.BigD(vars.coinbase))
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case oBLK_TIMESTAMP:
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vm.stack.Push(big.NewInt(vars.time))
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case oBLK_NUMBER:
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vm.stack.Push(big.NewInt(int64(vars.blockNumber)))
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case oBLK_DIFFICULTY:
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vm.stack.Push(vars.diff)
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case oBASEFEE:
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// e = 10^21
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e := big.NewInt(0).Exp(big.NewInt(10), big.NewInt(21), big.NewInt(0))
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d := new(big.Rat)
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d.SetInt(vars.diff)
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c := new(big.Rat)
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c.SetFloat64(0.5)
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// d = diff / 0.5
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d.Quo(d, c)
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// base = floor(d)
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base.Div(d.Num(), d.Denom())
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x := new(big.Int)
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x.Div(e, base)
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// x = floor(10^21 / floor(diff^0.5))
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vm.stack.Push(x)
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case oSHA256, oSHA3, oRIPEMD160:
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// This is probably save
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// ceil(pop / 32)
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length := int(math.Ceil(float64(vm.stack.Pop().Uint64()) / 32.0))
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// New buffer which will contain the concatenated popped items
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data := new(bytes.Buffer)
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for i := 0; i < length; i++ {
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// Encode the number to bytes and have it 32bytes long
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num := ethutil.NumberToBytes(vm.stack.Pop().Bytes(), 256)
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data.WriteString(string(num))
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}
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if op == oSHA256 {
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vm.stack.Push(base.SetBytes(ethutil.Sha256Bin(data.Bytes())))
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} else if op == oSHA3 {
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vm.stack.Push(base.SetBytes(ethutil.Sha3Bin(data.Bytes())))
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} else {
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vm.stack.Push(base.SetBytes(ethutil.Ripemd160(data.Bytes())))
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}
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case oECMUL:
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y := vm.stack.Pop()
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x := vm.stack.Pop()
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//n := vm.stack.Pop()
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//if ethutil.Big(x).Cmp(ethutil.Big(y)) {
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data := new(bytes.Buffer)
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data.WriteString(x.String())
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data.WriteString(y.String())
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if secp256k1.VerifyPubkeyValidity(data.Bytes()) == 1 {
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// TODO
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} else {
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// Invalid, push infinity
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vm.stack.Push(ethutil.Big("0"))
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vm.stack.Push(ethutil.Big("0"))
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}
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//} else {
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// // Invalid, push infinity
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// vm.stack.Push("0")
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// vm.stack.Push("0")
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//}
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case oECADD:
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case oECSIGN:
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case oECRECOVER:
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case oECVALID:
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case oPUSH:
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pc++
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vm.stack.Push(contract.GetMem(pc).BigInt())
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case oPOP:
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// Pop current value of the stack
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vm.stack.Pop()
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case oDUP:
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// Dup top stack
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x := vm.stack.Pop()
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vm.stack.Push(x)
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vm.stack.Push(x)
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case oSWAP:
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// Swap two top most values
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x, y := vm.stack.Popn()
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vm.stack.Push(y)
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vm.stack.Push(x)
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case oMLOAD:
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x := vm.stack.Pop()
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vm.stack.Push(vm.mem[x.String()])
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case oMSTORE:
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x, y := vm.stack.Popn()
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vm.mem[x.String()] = y
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case oSLOAD:
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// Load the value in storage and push it on the stack
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x := vm.stack.Pop()
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// decode the object as a big integer
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decoder := ethutil.NewValueFromBytes([]byte(contract.State().Get(x.String())))
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if !decoder.IsNil() {
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vm.stack.Push(decoder.BigInt())
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} else {
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vm.stack.Push(ethutil.BigFalse)
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}
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case oSSTORE:
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// Store Y at index X
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y, x := vm.stack.Popn()
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addr := ethutil.BigToBytes(x, 256)
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fmt.Printf(" => %x (%v) @ %v", y.Bytes(), y, ethutil.BigD(addr))
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contract.SetAddr(addr, y)
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//contract.State().Update(string(idx), string(y))
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case oJMP:
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x := int(vm.stack.Pop().Uint64())
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// Set pc to x - 1 (minus one so the incrementing at the end won't effect it)
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pc = x
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pc--
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case oJMPI:
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x := vm.stack.Pop()
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// Set pc to x if it's non zero
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if x.Cmp(ethutil.BigFalse) != 0 {
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pc = int(x.Uint64())
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pc--
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}
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case oIND:
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vm.stack.Push(big.NewInt(int64(pc)))
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case oEXTRO:
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memAddr := vm.stack.Pop()
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contractAddr := vm.stack.Pop().Bytes()
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// Push the contract's memory on to the stack
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vm.stack.Push(contractMemory(state, contractAddr, memAddr))
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case oBALANCE:
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// Pushes the balance of the popped value on to the stack
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account := state.GetAccount(vm.stack.Pop().Bytes())
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vm.stack.Push(account.Amount)
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case oMKTX:
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addr, value := vm.stack.Popn()
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from, length := vm.stack.Popn()
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makeInlineTx(addr.Bytes(), value, from, length, contract, state)
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case oSUICIDE:
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recAddr := vm.stack.Pop().Bytes()
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// Purge all memory
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deletedMemory := contract.state.NewIterator().Purge()
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// Add refunds to the pop'ed address
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refund := new(big.Int).Mul(StoreFee, big.NewInt(int64(deletedMemory)))
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account := state.GetAccount(recAddr)
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account.Amount.Add(account.Amount, refund)
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// Update the refunding address
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state.UpdateAccount(recAddr, account)
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// Delete the contract
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state.trie.Update(string(addr), "")
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fmt.Printf("(%d) => %x\n", deletedMemory, recAddr)
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break out
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default:
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fmt.Printf("Invalid OPCODE: %x\n", op)
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}
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fmt.Println("")
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vm.stack.Print()
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pc++
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}
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state.UpdateContract(addr, contract)
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}
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func makeInlineTx(addr []byte, value, from, length *big.Int, contract *Contract, state *State) {
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fmt.Printf(" => creating inline tx %x %v %v %v", addr, value, from, length)
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j := 0
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dataItems := make([]string, int(length.Uint64()))
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for i := from.Uint64(); i < length.Uint64(); i++ {
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dataItems[j] = contract.GetMem(j).Str()
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j++
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}
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tx := NewTransaction(addr, value, dataItems)
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if tx.IsContract() {
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contract := MakeContract(tx, state)
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state.UpdateContract(tx.Hash()[12:], contract)
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} else {
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account := state.GetAccount(tx.Recipient)
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account.Amount.Add(account.Amount, tx.Value)
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state.UpdateAccount(tx.Recipient, account)
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}
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}
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// Returns an address from the specified contract's address
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func contractMemory(state *State, contractAddr []byte, memAddr *big.Int) *big.Int {
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contract := state.GetContract(contractAddr)
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if contract == nil {
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log.Panicf("invalid contract addr %x", contractAddr)
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}
|
||||
val := state.trie.Get(memAddr.String())
|
||||
|
||||
// decode the object as a big integer
|
||||
decoder := ethutil.NewValueFromBytes([]byte(val))
|
||||
if decoder.IsNil() {
|
||||
return ethutil.BigFalse
|
||||
}
|
||||
|
||||
return decoder.BigInt()
|
||||
}
|
||||
106
ethchain/vm_test.go
Normal file
106
ethchain/vm_test.go
Normal file
@ -0,0 +1,106 @@
|
||||
package ethchain
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"github.com/ethereum/eth-go/ethdb"
|
||||
"github.com/ethereum/eth-go/ethutil"
|
||||
"math/big"
|
||||
"testing"
|
||||
)
|
||||
|
||||
func TestRun(t *testing.T) {
|
||||
InitFees()
|
||||
|
||||
ethutil.ReadConfig("")
|
||||
|
||||
db, _ := ethdb.NewMemDatabase()
|
||||
state := NewState(ethutil.NewTrie(db, ""))
|
||||
|
||||
script := Compile([]string{
|
||||
"TXSENDER",
|
||||
"SUICIDE",
|
||||
})
|
||||
|
||||
tx := NewTransaction(ContractAddr, big.NewInt(1e17), script)
|
||||
fmt.Printf("contract addr %x\n", tx.Hash()[12:])
|
||||
contract := MakeContract(tx, state)
|
||||
vm := &Vm{}
|
||||
|
||||
vm.Process(contract, state, RuntimeVars{
|
||||
address: tx.Hash()[12:],
|
||||
blockNumber: 1,
|
||||
sender: ethutil.FromHex("cd1722f3947def4cf144679da39c4c32bdc35681"),
|
||||
prevHash: ethutil.FromHex("5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6"),
|
||||
coinbase: ethutil.FromHex("2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"),
|
||||
time: 1,
|
||||
diff: big.NewInt(256),
|
||||
txValue: tx.Value,
|
||||
txData: tx.Data,
|
||||
})
|
||||
}
|
||||
|
||||
func TestRun1(t *testing.T) {
|
||||
ethutil.ReadConfig("")
|
||||
|
||||
db, _ := ethdb.NewMemDatabase()
|
||||
state := NewState(ethutil.NewTrie(db, ""))
|
||||
|
||||
script := Compile([]string{
|
||||
"PUSH", "0",
|
||||
"PUSH", "0",
|
||||
"TXSENDER",
|
||||
"PUSH", "10000000",
|
||||
"MKTX",
|
||||
})
|
||||
fmt.Println(ethutil.NewValue(script))
|
||||
|
||||
tx := NewTransaction(ContractAddr, ethutil.Big("100000000000000000000000000000000000000000000000000"), script)
|
||||
fmt.Printf("contract addr %x\n", tx.Hash()[12:])
|
||||
contract := MakeContract(tx, state)
|
||||
vm := &Vm{}
|
||||
|
||||
vm.Process(contract, state, RuntimeVars{
|
||||
address: tx.Hash()[12:],
|
||||
blockNumber: 1,
|
||||
sender: ethutil.FromHex("cd1722f3947def4cf144679da39c4c32bdc35681"),
|
||||
prevHash: ethutil.FromHex("5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6"),
|
||||
coinbase: ethutil.FromHex("2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"),
|
||||
time: 1,
|
||||
diff: big.NewInt(256),
|
||||
txValue: tx.Value,
|
||||
txData: tx.Data,
|
||||
})
|
||||
}
|
||||
|
||||
func TestRun2(t *testing.T) {
|
||||
ethutil.ReadConfig("")
|
||||
|
||||
db, _ := ethdb.NewMemDatabase()
|
||||
state := NewState(ethutil.NewTrie(db, ""))
|
||||
|
||||
script := Compile([]string{
|
||||
"PUSH", "0",
|
||||
"PUSH", "0",
|
||||
"TXSENDER",
|
||||
"PUSH", "10000000",
|
||||
"MKTX",
|
||||
})
|
||||
fmt.Println(ethutil.NewValue(script))
|
||||
|
||||
tx := NewTransaction(ContractAddr, ethutil.Big("100000000000000000000000000000000000000000000000000"), script)
|
||||
fmt.Printf("contract addr %x\n", tx.Hash()[12:])
|
||||
contract := MakeContract(tx, state)
|
||||
vm := &Vm{}
|
||||
|
||||
vm.Process(contract, state, RuntimeVars{
|
||||
address: tx.Hash()[12:],
|
||||
blockNumber: 1,
|
||||
sender: ethutil.FromHex("cd1722f3947def4cf144679da39c4c32bdc35681"),
|
||||
prevHash: ethutil.FromHex("5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6"),
|
||||
coinbase: ethutil.FromHex("2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"),
|
||||
time: 1,
|
||||
diff: big.NewInt(256),
|
||||
txValue: tx.Value,
|
||||
txData: tx.Data,
|
||||
})
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user