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233 lines
9.2 KiB
233 lines
9.2 KiB
package node
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import (
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"crypto/ecdsa"
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"math/big"
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"strings"
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"sync/atomic"
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"github.com/ethereum/go-ethereum/accounts/abi"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/harmony-one/harmony/internal/params"
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"github.com/harmony-one/harmony/common/denominations"
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"github.com/harmony-one/harmony/contracts"
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"github.com/harmony-one/harmony/contracts/structs"
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"github.com/harmony-one/harmony/core/types"
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common2 "github.com/harmony-one/harmony/internal/common"
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nodeconfig "github.com/harmony-one/harmony/internal/configs/node"
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"github.com/harmony-one/harmony/internal/genesis"
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"github.com/harmony-one/harmony/internal/utils"
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)
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// Constants related to smart contract.
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const (
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FaucetContractFund = 80000000
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)
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// BuiltInSC is the type of built-in smart contract in blockchain
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type builtInSC uint
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// List of smart contract type built-in
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const (
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scFaucet builtInSC = iota
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scStaking
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)
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// AddStakingContractToPendingTransactions adds the deposit smart contract the genesis block.
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func (node *Node) AddStakingContractToPendingTransactions() {
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// Add a contract deployment transaction
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//Generate contract key and associate funds with the smart contract
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priKey := genesis.GenesisBeaconAccountPriKey
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contractAddress := crypto.PubkeyToAddress(priKey.PublicKey)
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//Initially the smart contract should have minimal funds.
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contractFunds := big.NewInt(0)
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contractFunds = contractFunds.Mul(contractFunds, big.NewInt(denominations.One))
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dataEnc := common.FromHex(contracts.StakeLockContractBin)
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// Unsigned transaction to avoid the case of transaction address.
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mycontracttx, _ := types.SignTx(types.NewContractCreation(uint64(0), node.Consensus.ShardID, contractFunds, params.TxGasContractCreation*100, nil, dataEnc), types.HomesteadSigner{}, priKey)
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//node.StakingContractAddress = crypto.CreateAddress(contractAddress, uint64(0))
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node.StakingContractAddress = node.generateDeployedStakingContractAddress(contractAddress)
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node.addPendingTransactions(types.Transactions{mycontracttx})
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}
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// In order to get the deployed contract address of a contract, we need to find the nonce of the address that created it.
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// (Refer: https://solidity.readthedocs.io/en/v0.5.3/introduction-to-smart-contracts.html#index-8)
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// Then we can (re)create the deployed address. Trivially, this is 0 for us.
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// The deployed contract address can also be obtained via the receipt of the contract creating transaction.
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func (node *Node) generateDeployedStakingContractAddress(contractAddress common.Address) common.Address {
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//Correct Way 1:
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//node.SendTx(mycontracttx)
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//receipts := node.worker.GetCurrentReceipts()
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//deployedcontractaddress = receipts[len(receipts)-1].ContractAddress //get the address from the receipt
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//Correct Way 2:
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//nonce := GetNonce(contractAddress)
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//deployedAddress := crypto.CreateAddress(contractAddress, uint64(nonce))
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nonce := 0
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return crypto.CreateAddress(contractAddress, uint64(nonce))
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}
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// QueryStakeInfo queries the stake info from the stake contract.
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func (node *Node) QueryStakeInfo() *structs.StakeInfoReturnValue {
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abi, err := abi.JSON(strings.NewReader(contracts.StakeLockContractABI))
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to generate staking contract's ABI")
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return nil
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}
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bytesData, err := abi.Pack("listLockedAddresses")
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to generate ABI function bytes data")
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return nil
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}
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priKey := genesis.GenesisBeaconAccountPriKey
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deployerAddress := crypto.PubkeyToAddress(priKey.PublicKey)
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state, err := node.Blockchain().State()
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to get blockchain state")
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return nil
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}
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stakingContractAddress := crypto.CreateAddress(deployerAddress, uint64(0))
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tx := types.NewTransaction(
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state.GetNonce(deployerAddress),
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stakingContractAddress,
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node.NodeConfig.ShardID,
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nil,
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math.MaxUint64,
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nil,
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bytesData,
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)
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signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, priKey)
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to sign contract call tx")
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return nil
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}
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output, err := node.ContractCaller.CallContract(signedTx)
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to call staking contract")
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return nil
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}
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ret := &structs.StakeInfoReturnValue{}
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err = abi.Unpack(ret, "listLockedAddresses", output)
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to unpack stake info")
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return nil
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}
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return ret
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}
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func (node *Node) getDeployedStakingContract() common.Address {
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if node.NodeConfig.GetNetworkType() == nodeconfig.Mainnet {
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return common.Address{}
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}
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return node.StakingContractAddress
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}
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// GetNonceOfAddress returns nonce of an address.
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func (node *Node) GetNonceOfAddress(address common.Address) uint64 {
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state, err := node.Blockchain().State()
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to get chain state")
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return 0
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}
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return state.GetNonce(address)
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}
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// GetBalanceOfAddress returns balance of an address.
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func (node *Node) GetBalanceOfAddress(address common.Address) (*big.Int, error) {
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state, err := node.Blockchain().State()
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to get chain state")
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return nil, err
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}
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return state.GetBalance(address), nil
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}
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// AddFaucetContractToPendingTransactions adds the faucet contract the genesis block.
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func (node *Node) AddFaucetContractToPendingTransactions() {
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// Add a contract deployment transactionv
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priKey := node.ContractDeployerKey
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dataEnc := common.FromHex(contracts.FaucetBin)
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// Unsigned transaction to avoid the case of transaction address.
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contractFunds := big.NewInt(FaucetContractFund)
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contractFunds = contractFunds.Mul(contractFunds, big.NewInt(denominations.One))
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mycontracttx, _ := types.SignTx(
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types.NewContractCreation(uint64(0), node.Consensus.ShardID, contractFunds, params.TxGasContractCreation*10, nil, dataEnc),
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types.HomesteadSigner{},
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priKey)
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node.ContractAddresses = append(node.ContractAddresses, crypto.CreateAddress(crypto.PubkeyToAddress(priKey.PublicKey), uint64(0)))
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node.addPendingTransactions(types.Transactions{mycontracttx})
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}
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// CallFaucetContract invokes the faucet contract to give the walletAddress initial money
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func (node *Node) CallFaucetContract(address common.Address) common.Hash {
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if node.NodeConfig.GetNetworkType() == nodeconfig.Mainnet {
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return common.Hash{}
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}
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// Temporary code to workaround explorer issue for searching new addresses (https://github.com/harmony-one/harmony/issues/503)
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nonce := atomic.AddUint64(&node.ContractDeployerCurrentNonce, 1)
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tx, _ := types.SignTx(types.NewTransaction(nonce-1, address, node.Consensus.ShardID, big.NewInt(0), params.TxGasContractCreation*10, nil, nil), types.HomesteadSigner{}, node.ContractDeployerKey)
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utils.Logger().Info().Str("Address", common2.MustAddressToBech32(address)).Msg("Sending placeholder token to ")
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node.addPendingTransactions(types.Transactions{tx})
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// END Temporary code
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nonce = atomic.AddUint64(&node.ContractDeployerCurrentNonce, 1)
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return node.callGetFreeTokenWithNonce(address, nonce-1)
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}
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func (node *Node) callGetFreeToken(address common.Address) common.Hash {
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nonce := atomic.AddUint64(&node.ContractDeployerCurrentNonce, 1)
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return node.callGetFreeTokenWithNonce(address, nonce-1)
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}
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func (node *Node) callGetFreeTokenWithNonce(address common.Address, nonce uint64) common.Hash {
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abi, err := abi.JSON(strings.NewReader(contracts.FaucetABI))
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to generate faucet contract's ABI")
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return common.Hash{}
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}
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bytesData, err := abi.Pack("request", address)
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if err != nil {
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utils.Logger().Error().Err(err).Msg("Failed to generate ABI function bytes data")
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return common.Hash{}
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}
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if len(node.ContractAddresses) == 0 {
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utils.Logger().Error().Err(err).Msg("Failed to find the contract address")
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return common.Hash{}
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}
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tx, _ := types.SignTx(types.NewTransaction(nonce, node.ContractAddresses[0], node.Consensus.ShardID, big.NewInt(0), params.TxGasContractCreation*10, nil, bytesData), types.HomesteadSigner{}, node.ContractDeployerKey)
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utils.Logger().Info().Str("Address", common2.MustAddressToBech32(address)).Msg("Sending Free Token to ")
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node.addPendingTransactions(types.Transactions{tx})
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return tx.Hash()
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}
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// AddContractKeyAndAddress is used to add smart contract related information when node restart and resume with previous state
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// It supports three kinds of on-chain smart contracts for now.
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func (node *Node) AddContractKeyAndAddress(t builtInSC) {
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switch t {
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case scFaucet:
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// faucet contract
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contractDeployerKey, _ := ecdsa.GenerateKey(crypto.S256(), strings.NewReader("Test contract key string stream that is fixed so that generated test key are deterministic every time"))
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node.ContractDeployerKey = contractDeployerKey
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node.ContractAddresses = append(node.ContractAddresses, crypto.CreateAddress(crypto.PubkeyToAddress(contractDeployerKey.PublicKey), uint64(0)))
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case scStaking:
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// staking contract
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node.CurrentStakes = make(map[common.Address]*structs.StakeInfo)
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stakingPrivKey := genesis.GenesisBeaconAccountPriKey
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node.StakingContractAddress = crypto.CreateAddress(crypto.PubkeyToAddress(stakingPrivKey.PublicKey), uint64(0))
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default:
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utils.Logger().Error().Interface("unknown SC", t).Msg("AddContractKeyAndAddress")
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}
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}
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