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113 lines
12 KiB
113 lines
12 KiB
package node
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import (
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"crypto/ecdsa"
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"encoding/hex"
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"math/big"
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"strings"
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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/log"
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"github.com/ethereum/go-ethereum/params"
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"github.com/harmony-one/harmony/core/types"
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"github.com/harmony-one/harmony/internal/utils/contract"
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"golang.org/x/crypto/sha3"
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)
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// Constants related to smart contract.
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const (
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FaucetContractBinary = "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"
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FaucetContractFund = 8000000
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FaucetFreeMoneyMethodCall = "0x27c78c42000000000000000000000000"
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StakingContractBinary = "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"
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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, _ := ecdsa.GenerateKey(crypto.S256(), strings.NewReader("Deposit Smart Contract Key"))
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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(params.Ether))
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dataEnc := common.FromHex(StakingContractBinary)
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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*10, nil, dataEnc), types.HomesteadSigner{}, priKey)
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//node.StakingContractAddress = crypto.CreateAddress(contractAddress, uint64(0))
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node.StakingContractAddress = node.generateDeployedStakingContractAddress(mycontracttx, contractAddress)
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node.addPendingTransactions(types.Transactions{mycontracttx})
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}
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//CreateStakingWithdrawTransaction creates a new withdraw stake transaction
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func (node *Node) CreateStakingWithdrawTransaction(stake string) (*types.Transaction, error) {
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//These should be read from somewhere.
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DepositContractPriKey, _ := ecdsa.GenerateKey(crypto.S256(), strings.NewReader("Deposit Smart Contract Key")) //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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state, err := node.blockchain.State()
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if err != nil {
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log.Error("Failed to get chain state", "Error", err)
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}
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nonce := state.GetNonce(crypto.PubkeyToAddress(DepositContractPriKey.PublicKey))
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//Following: https://github.com/miguelmota/ethereum-development-with-go-book/blob/master/code/transfer_tokens.go
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withdrawFnSignature := []byte("withdraw(uint)")
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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 := new(big.Int)
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amount.SetString(stake, 10)
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paddedAmount := common.LeftPadBytes(amount.Bytes(), 32)
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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(nonce, DepositContractAddress, node.Consensus.ShardID, big.NewInt(0), params.TxGasContractCreation*10, nil, dataEnc), types.HomesteadSigner{}, node.AccountKey)
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return tx, err
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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.ContractKeys[0]
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dataEnc := common.FromHex(FaucetContractBinary)
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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(params.Ether))
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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(walletAddress common.Address) common.Hash {
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return node.createSendingMoneyTransaction(walletAddress)
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}
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func (node *Node) createSendingMoneyTransaction(walletAddress common.Address) common.Hash {
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state, err := node.blockchain.State()
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if err != nil {
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log.Error("Failed to get chain state", "Error", err)
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}
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nonce := state.GetNonce(crypto.PubkeyToAddress(node.ContractKeys[0].PublicKey))
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contractData := FaucetFreeMoneyMethodCall + hex.EncodeToString(walletAddress.Bytes())
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dataEnc := common.FromHex(contractData)
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tx, _ := types.SignTx(types.NewTransaction(nonce, node.ContractAddresses[0], node.Consensus.ShardID, big.NewInt(0), params.TxGasContractCreation*10, nil, dataEnc), types.HomesteadSigner{}, node.ContractKeys[0])
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node.addPendingTransactions(types.Transactions{tx})
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return tx.Hash()
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}
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// DepositToFakeAccounts invokes the faucet contract to give the walletAddress initial money
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func (node *Node) DepositToFakeAccounts() {
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for _, deployAccount := range contract.FakeAccounts {
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address := common.HexToAddress(deployAccount.Address)
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node.createSendingMoneyTransaction(address)
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}
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}
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