forked from mirror/go-ethereum
obscuren
11 years ago
commit
5db3335dce
Binary file not shown.
@ -0,0 +1,20 @@ |
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package main |
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import ( |
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"math/big" |
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) |
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func BigPow(a,b int) *big.Int { |
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c := new(big.Int) |
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c.Exp(big.NewInt(int64(a)), big.NewInt(int64(b)), big.NewInt(0)) |
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return c |
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} |
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func Big(num string) *big.Int { |
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n := new(big.Int) |
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n.SetString(num, 0) |
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return n |
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} |
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@ -0,0 +1,21 @@ |
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package main |
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import ( |
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_"fmt" |
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) |
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type Block struct { |
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transactions []*Transaction |
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} |
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func NewBlock(/* TODO use raw data */transactions []*Transaction) *Block { |
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block := &Block{ |
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// Slice of transactions to include in this block
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transactions: transactions, |
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} |
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return block |
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} |
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func (block *Block) Update() { |
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} |
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@ -0,0 +1,55 @@ |
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// Blocks, blocks will have transactions.
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// Transactions/contracts are updated in goroutines
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// Each contract should send a message on a channel with usage statistics
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// The statics can be used for fee calculation within the block update method
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// Statistics{transaction, /* integers */ normal_ops, store_load, extro_balance, crypto, steps}
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// The block updater will wait for all goroutines to be finished and update the block accordingly
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// in one go and should use minimal IO overhead.
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// The actual block updating will happen within a goroutine as well so normal operation may continue
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package main |
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import ( |
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_"fmt" |
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) |
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type BlockManager struct { |
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vm *Vm |
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} |
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func NewBlockManager() *BlockManager { |
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bm := &BlockManager{vm: NewVm()} |
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return bm |
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} |
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// Process a block.
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func (bm *BlockManager) ProcessBlock(block *Block) error { |
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txCount := len(block.transactions) |
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lockChan := make(chan bool, txCount) |
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for _, tx := range block.transactions { |
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go bm.ProcessTransaction(tx, lockChan) |
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} |
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// Wait for all Tx to finish processing
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for i := 0; i < txCount; i++ { |
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<- lockChan |
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} |
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return nil |
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} |
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func (bm *BlockManager) ProcessTransaction(tx *Transaction, lockChan chan bool) { |
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if tx.recipient == 0x0 { |
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bm.vm.RunTransaction(tx, func(opType OpType) bool { |
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// TODO calculate fees
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return true // Continue
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}) |
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} |
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// Broadcast we're done
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lockChan <- true |
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} |
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@ -0,0 +1,33 @@ |
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package main |
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import ( |
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"fmt" |
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) |
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func main() { |
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InitFees() |
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bm := NewBlockManager() |
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tx := NewTransaction(0x0, 20, []string{ |
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"SET 10 6", |
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"LD 10 10", |
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"LT 10 1 20", |
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"SET 255 7", |
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"JMPI 20 255", |
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"STOP", |
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"SET 30 200", |
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"LD 30 31", |
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"SET 255 22", |
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"JMPI 31 255", |
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"SET 255 15", |
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"JMP 255", |
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}) |
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tx2 := NewTransaction(0x0, 20, []string{"SET 10 6", "LD 10 10"}) |
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blck := NewBlock([]*Transaction{tx2, tx}) |
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bm.ProcessBlock( blck ) |
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fmt.Printf("rlp encoded Tx %q\n", tx.Serialize()) |
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} |
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@ -0,0 +1,113 @@ |
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package main |
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import ( |
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"fmt" |
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"strings" |
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"errors" |
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"math/big" |
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"strconv" |
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) |
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|
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// Op codes
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var OpCodes = map[string]string{ |
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"STOP": "0", |
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"ADD": "16", // 0x10
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"SUB": "17", // 0x11
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"MUL": "18", // 0x12
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"DIV": "19", // 0x13
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"SDIV": "20", // 0x14
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"MOD": "21", // 0x15
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"SMOD": "22", // 0x16
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"EXP": "23", // 0x17
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"NEG": "24", // 0x18
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"LT": "32", // 0x20
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"LE": "33", // 0x21
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"GT": "34", // 0x22
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"GE": "35", // 0x23
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"EQ": "36", // 0x24
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"NOT": "37", // 0x25
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"SHA256": "48", // 0x30
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"RIPEMD160": "49", // 0x31
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"ECMUL": "50", // 0x32
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"ECADD": "51", // 0x33
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"SIGN": "52", // 0x34
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"RECOVER": "53", // 0x35
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"COPY": "64", // 0x40
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"ST": "65", // 0x41
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"LD": "66", // 0x42
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"SET": "67", // 0x43
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"JMP": "80", // 0x50
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"JMPI": "81", // 0x51
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"IND": "82", // 0x52
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"EXTRO": "96", // 0x60
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"BALANCE": "97", // 0x61
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"MKTX": "112", // 0x70
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"DATA": "128", // 0x80
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"DATAN": "129", // 0x81
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"MYADDRESS": "144", // 0x90
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"BLKHASH": "145", // 0x91
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"COINBASE": "146", // 0x92
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"SUICIDE": "255", // 0xff
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} |
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func CompileInstr(s string) (string, error) { |
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tokens := strings.Split(s, " ") |
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if OpCodes[tokens[0]] == "" { |
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return "", errors.New(fmt.Sprintf("OP not found: %s", tokens[0])) |
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} |
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code := OpCodes[tokens[0]] // Replace op codes with the proper numerical equivalent
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op := new(big.Int) |
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op.SetString(code, 0) |
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args := make([]*big.Int, 6) |
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for i, val := range tokens[1:len(tokens)] { |
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num := new(big.Int) |
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num.SetString(val, 0) |
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args[i] = num |
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} |
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// Big int equation = op + x * 256 + y * 256**2 + z * 256**3 + a * 256**4 + b * 256**5 + c * 256**6
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base := new(big.Int) |
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x := new(big.Int) |
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y := new(big.Int) |
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z := new(big.Int) |
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a := new(big.Int) |
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b := new(big.Int) |
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c := new(big.Int) |
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if args[0] != nil { x.Mul(args[0], big.NewInt(256)) } |
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if args[1] != nil { y.Mul(args[1], BigPow(256, 2)) } |
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if args[2] != nil { z.Mul(args[2], BigPow(256, 3)) } |
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if args[3] != nil { a.Mul(args[3], BigPow(256, 4)) } |
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if args[4] != nil { b.Mul(args[4], BigPow(256, 5)) } |
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if args[5] != nil { c.Mul(args[5], BigPow(256, 6)) } |
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base.Add(op, x) |
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base.Add(base, y) |
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base.Add(base, z) |
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base.Add(base, a) |
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base.Add(base, b) |
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base.Add(base, c) |
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return base.String(), nil |
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} |
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func Instr(instr string) (int, []string, error) { |
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base := new(big.Int) |
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base.SetString(instr, 0) |
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args := make([]string, 7) |
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for i := 0; i < 7; i++ { |
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// int(int(val) / int(math.Pow(256,float64(i)))) % 256
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exp := BigPow(256, i) |
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num := new(big.Int) |
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num.Div(base, exp) |
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args[i] = num.Mod(num, big.NewInt(256)).String() |
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} |
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op, _ := strconv.Atoi(args[0]) |
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return op, args[1:7], nil |
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} |
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@ -0,0 +1,42 @@ |
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package main |
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import ( |
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"testing" |
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"math" |
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) |
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func TestCompile(t *testing.T) { |
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instr, err := CompileInstr("SET 10 1") |
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if err != nil { |
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t.Error("Failed compiling instruction") |
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} |
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calc := (67 + 10 * 256 + 1 * int64(math.Pow(256,2))) |
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if Big(instr).Int64() != calc { |
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t.Error("Expected", calc, ", got:", instr) |
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} |
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} |
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func TestValidInstr(t *testing.T) { |
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op, args, err := Instr("68163") |
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if err != nil { |
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t.Error("Error decoding instruction") |
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} |
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if op != oSET { |
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t.Error("Expected op to be 43, got:", op) |
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} |
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if args[0] != "10" { |
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t.Error("Expect args[0] to be 10, got:", args[0]) |
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} |
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if args[1] != "1" { |
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t.Error("Expected args[1] to be 1, got:", args[1]) |
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} |
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} |
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func TestInvalidInstr(t *testing.T) { |
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} |
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@ -0,0 +1,57 @@ |
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package main |
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import ( |
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"math" |
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"bytes" |
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) |
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func ToBinary(x int, bytes int) string { |
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if bytes == 0 { |
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return "" |
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} else { |
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return ToBinary(int(x / 256), bytes - 1) + string(x % 256) |
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} |
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} |
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func NumToVarInt(x int) string { |
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if x < 253 { |
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return string(x) |
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} else if x < int(math.Pow(2,16)) { |
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return string(253) + ToBinary(x, 2) |
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} else if x < int(math.Pow(2,32)) { |
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return string(253) + ToBinary(x, 4) |
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} else { |
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return string(253) + ToBinary(x, 8) |
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} |
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} |
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func RlpEncode(object interface{}) string { |
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if str, ok := object.(string); ok { |
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return "\x00" + NumToVarInt(len(str)) + str |
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} else if slice, ok := object.([]interface{}); ok { |
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var buffer bytes.Buffer |
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for _, val := range slice { |
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if v, ok := val.(string); ok { |
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buffer.WriteString(RlpEncode(v)) |
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} else { |
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buffer.WriteString(RlpEncode(val)) |
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} |
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} |
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return "\x01" + RlpEncode(len(buffer.String())) + buffer.String() |
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} else if slice, ok := object.([]string); ok { |
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// FIXME this isn't dry. Fix this
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var buffer bytes.Buffer |
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for _, val := range slice { |
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buffer.WriteString(RlpEncode(val)) |
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} |
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return "\x01" + RlpEncode(len(buffer.String())) + buffer.String() |
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} |
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return "" |
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} |
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type RlpSerializer interface { |
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} |
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@ -0,0 +1,20 @@ |
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package main |
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import ( |
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"testing" |
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"fmt" |
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) |
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func TestRlpEncode(t *testing.T) { |
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strRes := "\x00\x03dog" |
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str := RlpEncode("dog") |
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if str != strRes { |
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t.Error(fmt.Sprintf("Expected %q, got %q", strRes, str)) |
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} |
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sliceRes := "\x01\x00\x03dog\x00\x03god\x00\x03cat" |
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slice := RlpEncode([]string{"dog", "god", "cat"}) |
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if slice != sliceRes { |
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t.Error(fmt.Sprintf("Expected %q, got %q", sliceRes, slice)) |
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} |
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} |
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@ -0,0 +1,126 @@ |
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package main |
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import ( |
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"math/big" |
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"fmt" |
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"encoding/hex" |
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"crypto/sha256" |
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_ "bytes" |
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"strconv" |
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) |
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/* |
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Transaction Contract Size |
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------------------------------------------- |
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sender sender 20 bytes |
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recipient 0x0 20 bytes |
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value endowment 4 bytes (uint32) |
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fee fee 4 bytes (uint32) |
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d_size o_size 4 bytes (uint32) |
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data ops * |
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signature signature 64 bytes |
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*/ |
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var StepFee *big.Int = new(big.Int) |
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var TxFee *big.Int = new(big.Int) |
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var MemFee *big.Int = new(big.Int) |
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var DataFee *big.Int = new(big.Int) |
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var CryptoFee *big.Int = new(big.Int) |
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var ExtroFee *big.Int = new(big.Int) |
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var Period1Reward *big.Int = new(big.Int) |
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var Period2Reward *big.Int = new(big.Int) |
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var Period3Reward *big.Int = new(big.Int) |
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var Period4Reward *big.Int = new(big.Int) |
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type Transaction struct { |
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sender string |
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recipient uint32 |
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value uint32 |
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fee uint32 |
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data []string |
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memory []int |
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signature string |
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addr string |
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} |
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func NewTransaction(to uint32, value uint32, data []string) *Transaction { |
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tx := Transaction{sender: "1234567890", recipient: to, value: value} |
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tx.fee = 0//uint32((ContractFee + MemoryFee * float32(len(tx.data))) * 1e8)
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|
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// Serialize the data
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tx.data = make([]string, len(data)) |
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for i, val := range data { |
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instr, err := CompileInstr(val) |
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if err != nil { |
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fmt.Printf("compile error:%d %v", i+1, err) |
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} |
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tx.data[i] = instr |
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} |
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b:= []byte(tx.Serialize()) |
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hash := sha256.Sum256(b) |
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tx.addr = hex.EncodeToString(hash[0:19]) |
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return &tx |
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} |
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func Uitoa(i uint32) string { |
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return strconv.FormatUint(uint64(i), 10) |
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} |
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func (tx *Transaction) Serialize() string { |
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// Prepare the transaction for serialization
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preEnc := []interface{}{ |
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"0", // TODO last Tx
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tx.sender, |
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// XXX In the future there's no need to cast to string because they'll end up being big numbers (strings)
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Uitoa(tx.recipient), |
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Uitoa(tx.value), |
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Uitoa(tx.fee), |
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tx.data, |
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} |
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|
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return RlpEncode(preEnc) |
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} |
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|
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func InitFees() { |
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// Base for 2**60
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b60 := new(big.Int) |
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b60.Exp(big.NewInt(2), big.NewInt(60), big.NewInt(0)) |
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// Base for 2**80
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b80 := new(big.Int) |
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b80.Exp(big.NewInt(2), big.NewInt(80), big.NewInt(0)) |
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StepFee.Mul(b60, big.NewInt(4096)) |
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//fmt.Println("StepFee:", StepFee)
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TxFee.Mul(b60, big.NewInt(524288)) |
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//fmt.Println("TxFee:", TxFee)
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|
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MemFee.Mul(b60, big.NewInt(262144)) |
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//fmt.Println("MemFee:", MemFee)
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|
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DataFee.Mul(b60, big.NewInt(16384)) |
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//fmt.Println("DataFee:", DataFee)
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|
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CryptoFee.Mul(b60, big.NewInt(65536)) |
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//fmt.Println("CrytoFee:", CryptoFee)
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|
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ExtroFee.Mul(b60, big.NewInt(65536)) |
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//fmt.Println("ExtroFee:", ExtroFee)
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|
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Period1Reward.Mul(b80, big.NewInt(1024)) |
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//fmt.Println("Period1Reward:", Period1Reward)
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|
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Period2Reward.Mul(b80, big.NewInt(512)) |
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//fmt.Println("Period2Reward:", Period2Reward)
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|
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Period3Reward.Mul(b80, big.NewInt(256)) |
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//fmt.Println("Period3Reward:", Period3Reward)
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|
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Period4Reward.Mul(b80, big.NewInt(128)) |
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//fmt.Println("Period4Reward:", Period4Reward)
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} |
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@ -0,0 +1,182 @@ |
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package main |
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|
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import ( |
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"math" |
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"math/big" |
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"fmt" |
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"strconv" |
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_ "encoding/hex" |
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) |
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|
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// Op codes
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const ( |
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oSTOP int = 0x00 |
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oADD int = 0x10 |
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oSUB int = 0x11 |
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oMUL int = 0x12 |
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oDIV int = 0x13 |
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oSDIV int = 0x14 |
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oMOD int = 0x15 |
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oSMOD int = 0x16 |
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oEXP int = 0x17 |
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oNEG int = 0x18 |
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oLT int = 0x20 |
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oLE int = 0x21 |
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oGT int = 0x22 |
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oGE int = 0x23 |
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oEQ int = 0x24 |
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oNOT int = 0x25 |
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oSHA256 int = 0x30 |
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oRIPEMD160 int = 0x31 |
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oECMUL int = 0x32 |
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oECADD int = 0x33 |
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oSIGN int = 0x34 |
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oRECOVER int = 0x35 |
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oCOPY int = 0x40 |
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oST int = 0x41 |
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oLD int = 0x42 |
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oSET int = 0x43 |
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oJMP int = 0x50 |
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oJMPI int = 0x51 |
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oIND int = 0x52 |
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oEXTRO int = 0x60 |
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oBALANCE int = 0x61 |
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oMKTX int = 0x70 |
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oDATA int = 0x80 |
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oDATAN int = 0x81 |
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oMYADDRESS int = 0x90 |
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oSUICIDE int = 0xff |
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) |
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|
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type OpType int |
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const ( |
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tNorm = iota |
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tData |
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tExtro |
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tCrypto |
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) |
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type TxCallback func(opType OpType) bool |
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|
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type Vm struct { |
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// Memory stack
|
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stack map[string]string |
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// Index ptr
|
||||
iptr int |
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memory map[string]map[string]string |
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} |
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|
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func NewVm() *Vm { |
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fmt.Println("init Ethereum VM") |
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|
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stackSize := uint(256) |
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fmt.Println("stack size =", stackSize) |
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|
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return &Vm{make(map[string]string), 0, make(map[string]map[string]string)} |
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} |
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|
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func (vm *Vm) RunTransaction(tx *Transaction, cb TxCallback) { |
||||
fmt.Printf(` |
||||
# processing Tx (%v) |
||||
# fee = %f, ops = %d, sender = %s, value = %d |
||||
`, tx.addr, float32(tx.fee) / 1e8, len(tx.data), tx.sender, tx.value) |
||||
|
||||
vm.stack = make(map[string]string) |
||||
vm.stack["0"] = tx.sender |
||||
vm.stack["1"] = "100" //int(tx.value)
|
||||
vm.stack["1"] = "1000" //int(tx.fee)
|
||||
|
||||
//vm.memory[tx.addr] = make([]int, 256)
|
||||
vm.memory[tx.addr] = make(map[string]string) |
||||
|
||||
// Define instruction 'accessors' for the instruction, which makes it more readable
|
||||
// also called register values, shorthanded as Rx/y/z. Memory address are shorthanded as Mx/y/z.
|
||||
// Instructions are shorthanded as Ix/y/z
|
||||
x := 0; y := 1; z := 2; //a := 3; b := 4; c := 5
|
||||
out: |
||||
for vm.iptr < len(tx.data) { |
||||
// The base big int for all calculations. Use this for any results.
|
||||
base := new(big.Int) |
||||
// XXX Should Instr return big int slice instead of string slice?
|
||||
op, args, _ := Instr(tx.data[vm.iptr]) |
||||
|
||||
fmt.Printf("%-3d %d %v\n", vm.iptr, op, args) |
||||
|
||||
opType := OpType(tNorm) |
||||
// Determine the op type (used for calculating fees by the block manager)
|
||||
switch op { |
||||
case oEXTRO, oBALANCE: |
||||
opType = tExtro |
||||
case oSHA256, oRIPEMD160, oECMUL, oECADD: // TODO add rest
|
||||
opType = tCrypto |
||||
} |
||||
|
||||
// If the callback yielded a negative result abort execution
|
||||
if !cb(opType) { break out } |
||||
|
||||
nptr := vm.iptr |
||||
switch op { |
||||
case oSTOP: |
||||
fmt.Println("exiting (oSTOP), idx =", nptr) |
||||
|
||||
break out |
||||
case oADD: |
||||
// (Rx + Ry) % 2 ** 256
|
||||
base.Add(Big(vm.stack[args[ x ]]), Big(vm.stack[args[ y ]])) |
||||
base.Mod(base, big.NewInt(int64(math.Pow(2, 256)))) |
||||
// Set the result to Rz
|
||||
vm.stack[args[ z ]] = base.String() |
||||
case oSUB: |
||||
// (Rx - Ry) % 2 ** 256
|
||||
base.Sub(Big(vm.stack[args[ x ]]), Big(vm.stack[args[ y ]])) |
||||
base.Mod(base, big.NewInt(int64(math.Pow(2, 256)))) |
||||
// Set the result to Rz
|
||||
vm.stack[args[ z ]] = base.String() |
||||
case oMUL: |
||||
// (Rx * Ry) % 2 ** 256
|
||||
base.Mul(Big(vm.stack[args[ x ]]), Big(vm.stack[args[ y ]])) |
||||
base.Mod(base, big.NewInt(int64(math.Pow(2, 256)))) |
||||
// Set the result to Rz
|
||||
vm.stack[args[ z ]] = base.String() |
||||
case oDIV: |
||||
// floor(Rx / Ry)
|
||||
base.Div(Big(vm.stack[args[ x ]]), Big(vm.stack[args[ y ]])) |
||||
// Set the result to Rz
|
||||
vm.stack[args[ z ]] = base.String() |
||||
case oSET: |
||||
// Set the (numeric) value at Iy to Rx
|
||||
vm.stack[args[ x ]] = args[ y ] |
||||
case oLD: |
||||
// Load the value at Mx to Ry
|
||||
vm.stack[args[ y ]] = vm.memory[tx.addr][vm.stack[args[ x ]]] |
||||
case oLT: |
||||
cmp := Big(vm.stack[args[ x ]]).Cmp( Big(vm.stack[args[ y ]]) ) |
||||
// Set the result as "boolean" value to Rz
|
||||
if cmp < 0 { // a < b
|
||||
vm.stack[args[ z ]] = "1" |
||||
} else { |
||||
vm.stack[args[ z ]] = "0" |
||||
} |
||||
case oJMP: |
||||
// Set the instruction pointer to the value at Rx
|
||||
ptr, _ := strconv.Atoi( vm.stack[args[ x ]] ) |
||||
nptr = ptr |
||||
case oJMPI: |
||||
// Set the instruction pointer to the value at Ry if Rx yields true
|
||||
if vm.stack[args[ x ]] != "0" { |
||||
ptr, _ := strconv.Atoi( vm.stack[args[ y ]] ) |
||||
nptr = ptr |
||||
} |
||||
default: |
||||
fmt.Println("Error op", op) |
||||
break |
||||
} |
||||
|
||||
if vm.iptr == nptr { |
||||
vm.iptr++ |
||||
} else { |
||||
vm.iptr = nptr |
||||
fmt.Println("... JMP", nptr, "...") |
||||
} |
||||
} |
||||
fmt.Println("# finished processing Tx\n") |
||||
} |
||||
Loading…
Reference in new issue