Merge pull request #500 from harmony-one/rj_branch
Move staking related code to staking.gopull/502/head
Rongjian Lan
6 years ago
committed by
GitHub
commit
4b9c2e27f0
@ -0,0 +1,82 @@ |
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package node |
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import ( |
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"math/big" |
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"github.com/ethereum/go-ethereum/common/hexutil" |
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"github.com/harmony-one/harmony/core/types" |
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) |
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//constants related to staking
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//The first four bytes of the call data for a function call specifies the function to be called.
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//It is the first (left, high-order in big-endian) four bytes of the Keccak-256 (SHA-3)
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//Refer: https://solidity.readthedocs.io/en/develop/abi-spec.html
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const ( |
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depositFuncSignature = "0xd0e30db0" |
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withdrawFuncSignature = "0x2e1a7d4d" |
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funcSingatureBytes = 4 |
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) |
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// UpdateStakingList updates the stakes of every node.
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// TODO: read directly from smart contract, or at least check the receipt also for incompleted transaction.
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func (node *Node) UpdateStakingList(block *types.Block) error { |
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signerType := types.HomesteadSigner{} |
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txns := block.Transactions() |
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for i := range txns { |
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txn := txns[i] |
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toAddress := txn.To() |
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if toAddress != nil && *toAddress != node.StakingContractAddress { //Not a address aimed at the staking contract.
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continue |
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} |
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currentSender, _ := types.Sender(signerType, txn) |
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_, isPresent := node.CurrentStakes[currentSender] |
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data := txn.Data() |
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switch funcSignature := decodeFuncSign(data); funcSignature { |
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case depositFuncSignature: //deposit, currently: 0xd0e30db0
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amount := txn.Value() |
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value := amount.Int64() |
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if isPresent { |
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//This means the node has increased its stake.
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node.CurrentStakes[currentSender] += value |
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} else { |
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//This means its a new node that is staking the first time.
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node.CurrentStakes[currentSender] = value |
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} |
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case withdrawFuncSignature: //withdaw, currently: 0x2e1a7d4d
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value := decodeStakeCall(data) |
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if isPresent { |
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if node.CurrentStakes[currentSender] > value { |
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node.CurrentStakes[currentSender] -= value |
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} else if node.CurrentStakes[currentSender] == value { |
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delete(node.CurrentStakes, currentSender) |
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} else { |
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continue //Overdraft protection.
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} |
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} else { |
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continue //no-op: a node that is not staked cannot withdraw stake.
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} |
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default: |
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continue //no-op if its not deposit or withdaw
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} |
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} |
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return nil |
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} |
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//The first four bytes of the call data for a function call specifies the function to be called.
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//It is the first (left, high-order in big-endian) four bytes of the Keccak-256 (SHA-3)
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//Refer: https://solidity.readthedocs.io/en/develop/abi-spec.html
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func decodeStakeCall(getData []byte) int64 { |
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value := new(big.Int) |
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value.SetBytes(getData[funcSingatureBytes:]) //Escape the method call.
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return value.Int64() |
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} |
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//The first four bytes of the call data for a function call specifies the function to be called.
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//It is the first (left, high-order in big-endian) four bytes of the Keccak-256 (SHA-3)
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//Refer: https://solidity.readthedocs.io/en/develop/abi-spec.html
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//gets the function signature from data.
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func decodeFuncSign(data []byte) string { |
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funcSign := hexutil.Encode(data[:funcSingatureBytes]) //The function signature is first 4 bytes of data in ethereum
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return funcSign |
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} |
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@ -0,0 +1,111 @@ |
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package node |
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import ( |
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"math/big" |
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"testing" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/crypto" |
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"github.com/ethereum/go-ethereum/params" |
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"github.com/harmony-one/harmony/consensus" |
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"github.com/harmony-one/harmony/core/types" |
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"github.com/harmony-one/harmony/internal/utils" |
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"github.com/harmony-one/harmony/p2p" |
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"github.com/harmony-one/harmony/p2p/p2pimpl" |
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"golang.org/x/crypto/sha3" |
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) |
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func TestUpdateStakingDeposit(t *testing.T) { |
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_, pubKey := utils.GenKey("1", "2") |
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leader := p2p.Peer{IP: "127.0.0.1", Port: "8882", PubKey: pubKey} |
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validator := p2p.Peer{IP: "127.0.0.1", Port: "8885"} |
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priKey, _, _ := utils.GenKeyP2P("127.0.0.1", "9902") |
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host, err := p2pimpl.NewHost(&leader, priKey) |
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if err != nil { |
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t.Fatalf("newhost failure: %v", err) |
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} |
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consensus := consensus.New(host, "0", []p2p.Peer{leader, validator}, leader) |
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node := New(host, consensus, nil) |
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node.CurrentStakes = make(map[common.Address]int64) |
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DepositContractPriKey, _ := crypto.GenerateKey() //DepositContractPriKey is pk for contract
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DepositContractAddress := crypto.PubkeyToAddress(DepositContractPriKey.PublicKey) //DepositContractAddress is the address for the contract
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node.StakingContractAddress = DepositContractAddress |
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node.AccountKey, _ = crypto.GenerateKey() |
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Address := crypto.PubkeyToAddress(node.AccountKey.PublicKey) |
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callingFunction := "0xd0e30db0" |
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amount := new(big.Int) |
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amount.SetString("10", 10) |
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dataEnc := common.FromHex(callingFunction) //Deposit Does not take a argument, stake is transferred via amount.
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tx1, err := types.SignTx(types.NewTransaction(0, DepositContractAddress, node.Consensus.ShardID, amount, params.TxGasContractCreation*10, nil, dataEnc), types.HomesteadSigner{}, node.AccountKey) |
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var txs []*types.Transaction |
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txs = append(txs, tx1) |
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header := &types.Header{Extra: []byte("hello")} |
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block := types.NewBlock(header, txs, nil) |
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node.UpdateStakingList(block) |
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if len(node.CurrentStakes) == 0 { |
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t.Error("New node's stake was not added") |
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} |
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value, ok := node.CurrentStakes[Address] |
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if !ok { |
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t.Error("The correct address was not added") |
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} |
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if value != 10 { |
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t.Error("The correct stake value was not added") |
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} |
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} |
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func TestUpdateStakingWithdrawal(t *testing.T) { |
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_, pubKey := utils.GenKey("1", "2") |
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leader := p2p.Peer{IP: "127.0.0.1", Port: "8882", PubKey: pubKey} |
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validator := p2p.Peer{IP: "127.0.0.1", Port: "8885"} |
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priKey, _, _ := utils.GenKeyP2P("127.0.0.1", "9902") |
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host, err := p2pimpl.NewHost(&leader, priKey) |
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if err != nil { |
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t.Fatalf("newhost failure: %v", err) |
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} |
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consensus := consensus.New(host, "0", []p2p.Peer{leader, validator}, leader) |
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node := New(host, consensus, nil) |
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node.CurrentStakes = make(map[common.Address]int64) |
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DepositContractPriKey, _ := crypto.GenerateKey() //DepositContractPriKey is pk for contract
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DepositContractAddress := crypto.PubkeyToAddress(DepositContractPriKey.PublicKey) //DepositContractAddress is the address for the contract
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node.StakingContractAddress = DepositContractAddress |
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node.AccountKey, _ = crypto.GenerateKey() |
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Address := crypto.PubkeyToAddress(node.AccountKey.PublicKey) |
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initialStake := int64(1010) |
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node.CurrentStakes[Address] = initialStake //initial stake
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withdrawFnSignature := []byte("withdraw(uint256)") |
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hash := sha3.NewLegacyKeccak256() |
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hash.Write(withdrawFnSignature) |
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methodID := hash.Sum(nil)[:4] |
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amount := "10" |
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stakeToWithdraw := new(big.Int) |
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stakeToWithdraw.SetString(amount, 10) |
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paddedAmount := common.LeftPadBytes(stakeToWithdraw.Bytes(), 32) |
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remainingStakeShouldBe := initialStake - stakeToWithdraw.Int64() |
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var dataEnc []byte |
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dataEnc = append(dataEnc, methodID...) |
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dataEnc = append(dataEnc, paddedAmount...) |
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tx, err := types.SignTx(types.NewTransaction(0, DepositContractAddress, node.Consensus.ShardID, big.NewInt(0), params.TxGasContractCreation*10, nil, dataEnc), types.HomesteadSigner{}, node.AccountKey) |
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var txs []*types.Transaction |
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txs = append(txs, tx) |
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header := &types.Header{Extra: []byte("hello")} |
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block := types.NewBlock(header, txs, nil) |
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node.UpdateStakingList(block) |
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currentStake, ok := node.CurrentStakes[Address] |
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if !ok { |
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t.Error("The correct address was not present") |
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} |
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if currentStake != remainingStakeShouldBe { |
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t.Error("The correct stake value was not subtracted") |
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} |
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} |
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