228 lines
6.6 KiB
Go
228 lines
6.6 KiB
Go
package core
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import (
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"time"
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"github.com/nspcc-dev/neo-go/pkg/config"
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"github.com/nspcc-dev/neo-go/pkg/core/block"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm"
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"github.com/nspcc-dev/neo-go/pkg/vm/emit"
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"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
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)
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var (
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// governingTokenTX represents transaction that is used to create
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// governing (NEO) token. It's a part of the genesis block.
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governingTokenTX transaction.Transaction
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// utilityTokenTX represents transaction that is used to create
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// utility (GAS) token. It's a part of the genesis block. It's mostly
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// useful for its hash that represents GAS asset ID.
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utilityTokenTX transaction.Transaction
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// ecdsaVerifyInteropPrice returns the price of Neo.Crypto.ECDsaVerify
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// syscall to calculate NetworkFee for transaction
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ecdsaVerifyInteropPrice = util.Fixed8(100000)
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)
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// createGenesisBlock creates a genesis block based on the given configuration.
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func createGenesisBlock(cfg config.ProtocolConfiguration) (*block.Block, error) {
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validators, err := getValidators(cfg)
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if err != nil {
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return nil, err
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}
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nextConsensus, err := getNextConsensusAddress(validators)
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if err != nil {
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return nil, err
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}
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base := block.Base{
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Version: 0,
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PrevHash: util.Uint256{},
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Timestamp: uint64(time.Date(2016, 7, 15, 15, 8, 21, 0, time.UTC).Unix()),
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Index: 0,
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NextConsensus: nextConsensus,
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Script: transaction.Witness{
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InvocationScript: []byte{},
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VerificationScript: []byte{byte(opcode.OLDPUSH1)},
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},
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}
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rawScript, err := smartcontract.CreateMultiSigRedeemScript(
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len(cfg.StandbyValidators)/2+1,
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validators,
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)
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if err != nil {
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return nil, err
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}
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scriptOut := hash.Hash160(rawScript)
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issueTx := transaction.NewIssueTX()
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// TODO NEO3.0: nonce should be constant to avoid variability of genesis block
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issueTx.Nonce = 0
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issueTx.Sender = hash.Hash160([]byte{byte(opcode.OLDPUSH1)})
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issueTx.Outputs = []transaction.Output{
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{
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AssetID: governingTokenTX.Hash(),
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Amount: governingTokenTX.Data.(*transaction.RegisterTX).Amount,
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ScriptHash: scriptOut,
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},
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}
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issueTx.Scripts = []transaction.Witness{
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{
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InvocationScript: []byte{},
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VerificationScript: []byte{byte(opcode.OLDPUSH1)},
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},
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}
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b := &block.Block{
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Base: base,
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Transactions: []*transaction.Transaction{
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&governingTokenTX,
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&utilityTokenTX,
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issueTx,
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deployNativeContracts(),
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},
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ConsensusData: block.ConsensusData{
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PrimaryIndex: 0,
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Nonce: 2083236893,
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},
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}
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if err = b.RebuildMerkleRoot(); err != nil {
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return nil, err
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}
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return b, nil
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}
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func deployNativeContracts() *transaction.Transaction {
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buf := io.NewBufBinWriter()
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emit.Syscall(buf.BinWriter, "Neo.Native.Deploy")
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script := buf.Bytes()
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tx := transaction.NewInvocationTX(script, 0)
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tx.Nonce = 0
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tx.Sender = hash.Hash160([]byte{byte(opcode.PUSH1)})
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tx.Scripts = []transaction.Witness{
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{
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InvocationScript: []byte{},
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VerificationScript: []byte{byte(opcode.PUSH1)},
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},
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}
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return tx
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}
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func init() {
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admin := hash.Hash160([]byte{byte(opcode.OLDPUSH1)})
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registerTX := &transaction.RegisterTX{
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AssetType: transaction.GoverningToken,
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Name: "[{\"lang\":\"zh-CN\",\"name\":\"小蚁股\"},{\"lang\":\"en\",\"name\":\"AntShare\"}]",
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Amount: util.Fixed8FromInt64(100000000),
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Precision: 0,
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Admin: admin,
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}
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governingTokenTX = *transaction.NewRegisterTX(registerTX)
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// TODO NEO3.0: nonce should be constant to avoid variability of token hash
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governingTokenTX.Nonce = 0
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governingTokenTX.Sender = hash.Hash160([]byte{byte(opcode.OLDPUSH1)})
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admin = hash.Hash160([]byte{0x00})
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registerTX = &transaction.RegisterTX{
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AssetType: transaction.UtilityToken,
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Name: "[{\"lang\":\"zh-CN\",\"name\":\"小蚁币\"},{\"lang\":\"en\",\"name\":\"AntCoin\"}]",
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Amount: calculateUtilityAmount(),
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Precision: 8,
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Admin: admin,
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}
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utilityTokenTX = *transaction.NewRegisterTX(registerTX)
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// TODO NEO3.0: nonce should be constant to avoid variability of token hash
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utilityTokenTX.Nonce = 0
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utilityTokenTX.Sender = hash.Hash160([]byte{byte(opcode.OLDPUSH1)})
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}
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// GoverningTokenID returns the governing token (NEO) hash.
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func GoverningTokenID() util.Uint256 {
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return governingTokenTX.Hash()
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}
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// UtilityTokenID returns the utility token (GAS) hash.
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func UtilityTokenID() util.Uint256 {
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return utilityTokenTX.Hash()
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}
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func getValidators(cfg config.ProtocolConfiguration) ([]*keys.PublicKey, error) {
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validators := make([]*keys.PublicKey, len(cfg.StandbyValidators))
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for i, pubKeyStr := range cfg.StandbyValidators {
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pubKey, err := keys.NewPublicKeyFromString(pubKeyStr)
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if err != nil {
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return nil, err
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}
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validators[i] = pubKey
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}
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return validators, nil
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}
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func getNextConsensusAddress(validators []*keys.PublicKey) (val util.Uint160, err error) {
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vlen := len(validators)
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raw, err := smartcontract.CreateMultiSigRedeemScript(
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vlen-(vlen-1)/3,
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validators,
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)
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if err != nil {
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return val, err
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}
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return hash.Hash160(raw), nil
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}
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func calculateUtilityAmount() util.Fixed8 {
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sum := 0
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for i := 0; i < len(genAmount); i++ {
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sum += genAmount[i]
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}
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return util.Fixed8FromInt64(int64(sum * decrementInterval))
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}
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// headerSliceReverse reverses the given slice of *Header.
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func headerSliceReverse(dest []*block.Header) {
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for i, j := 0, len(dest)-1; i < j; i, j = i+1, j-1 {
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dest[i], dest[j] = dest[j], dest[i]
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}
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}
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// CalculateNetworkFee returns network fee for transaction
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func CalculateNetworkFee(script []byte) (util.Fixed8, int) {
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var (
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netFee util.Fixed8
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size int
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)
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if vm.IsSignatureContract(script) {
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size += 67 + io.GetVarSize(script)
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netFee = netFee.Add(opcodePrice(opcode.PUSHDATA1, opcode.PUSHNULL).Add(ecdsaVerifyInteropPrice))
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} else if n, pubs, ok := vm.ParseMultiSigContract(script); ok {
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m := len(pubs)
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sizeInv := 66 * m
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size += io.GetVarSize(sizeInv) + sizeInv + io.GetVarSize(script)
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netFee = netFee.Add(calculateMultisigFee(m)).Add(calculateMultisigFee(n))
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netFee = netFee.Add(opcodePrice(opcode.PUSHNULL)).Add(util.Fixed8(int64(ecdsaVerifyInteropPrice) * int64(n)))
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} else {
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// We can support more contract types in the future.
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}
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return netFee, size
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}
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func calculateMultisigFee(n int) util.Fixed8 {
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result := util.Fixed8(int64(opcodePrice(opcode.PUSHDATA1)) * int64(n))
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bw := io.NewBufBinWriter()
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emit.Int(bw.BinWriter, int64(n))
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// it's a hack because prices of small PUSH* opcodes are equal
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result = result.Add(opcodePrice(opcode.Opcode(bw.Bytes()[0])))
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return result
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}
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