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84 lines
2.7 KiB
84 lines
2.7 KiB
6 years ago
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package node
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// CreateTransactionForEnterMethod creates transaction to call enter method of lottery contract.
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import (
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"math/big"
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"os"
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"strings"
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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/crypto"
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"github.com/ethereum/go-ethereum/params"
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"github.com/harmony-one/harmony/contracts"
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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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contract_constants "github.com/harmony-one/harmony/internal/utils/contract"
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)
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// Constants for lottery.
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const (
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Enter = "enter"
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GetPlayers = "getPlayers"
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)
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// AddLotteryContract adds the demo lottery contract the genesis block.
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func (node *Node) AddLotteryContract() {
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// Add a lottery demo contract.
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priKey, err := crypto.HexToECDSA(contract_constants.DemoAccounts[0].Private)
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if err != nil {
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utils.GetLogInstance().Error("Error when creating private key for demo contract")
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// Exit here to recognize the coding working.
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// Basically we will remove this logic when launching so it's fine for now.
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os.Exit(1)
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}
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dataEnc := common.FromHex(contracts.LotteryBin)
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// Unsigned transaction to avoid the case of transaction address.
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contractFunds := big.NewInt(0)
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contractFunds = contractFunds.Mul(contractFunds, big.NewInt(params.Ether))
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demoContract, _ := 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.DemoContractAddress = crypto.CreateAddress(crypto.PubkeyToAddress(priKey.PublicKey), uint64(0))
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node.addPendingTransactions(types.Transactions{demoContract})
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}
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// CreateTransactionForEnterMethod generates transaction for enter method and add it into pending tx list.
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func (node *Node) CreateTransactionForEnterMethod(amount int64, priKey string) {
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var err error
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toAddress := node.DemoContractAddress
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abi, err := abi.JSON(strings.NewReader(contracts.LotteryABI))
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if err != nil {
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utils.GetLogInstance().Error("Failed to generate staking contract's ABI", "error", err)
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}
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bytesData, err := abi.Pack(Enter)
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if err != nil {
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utils.GetLogInstance().Error("Failed to generate ABI function bytes data", "error", err)
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}
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key, err := crypto.HexToECDSA(priKey)
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nonce := node.GetNonceOfAddress(crypto.PubkeyToAddress(key.PublicKey))
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tx := types.NewTransaction(
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nonce,
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toAddress,
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0,
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big.NewInt(amount),
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params.TxGas*10,
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nil,
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bytesData,
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)
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if err != nil {
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utils.GetLogInstance().Error("Failed to get private key", "error", err)
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}
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if signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, key); err == nil {
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node.addPendingTransactions(types.Transactions{signedTx})
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} else {
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utils.GetLogInstance().Error("Unable to call enter method", "error", err)
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}
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}
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