neoneo-go/pkg/core/util.go

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package core
import (
"time"
"github.com/CityOfZion/neo-go/config"
"github.com/CityOfZion/neo-go/pkg/core/block"
"github.com/CityOfZion/neo-go/pkg/core/transaction"
"github.com/CityOfZion/neo-go/pkg/crypto/hash"
"github.com/CityOfZion/neo-go/pkg/crypto/keys"
"github.com/CityOfZion/neo-go/pkg/smartcontract"
"github.com/CityOfZion/neo-go/pkg/util"
"github.com/CityOfZion/neo-go/pkg/vm/opcode"
)
var (
// governingTokenTX represents transaction that is used to create
// governing (NEO) token. It's a part of the genesis block.
governingTokenTX transaction.Transaction
// utilityTokenTX represents transaction that is used to create
// utility (GAS) token. It's a part of the genesis block. It's mostly
// useful for its hash that represents GAS asset ID.
utilityTokenTX transaction.Transaction
)
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// createGenesisBlock creates a genesis block based on the given configuration.
func createGenesisBlock(cfg config.ProtocolConfiguration) (*block.Block, error) {
validators, err := getValidators(cfg)
if err != nil {
return nil, err
}
nextConsensus, err := getNextConsensusAddress(validators)
if err != nil {
return nil, err
}
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base := block.Base{
Version: 0,
PrevHash: util.Uint256{},
Timestamp: uint32(time.Date(2016, 7, 15, 15, 8, 21, 0, time.UTC).Unix()),
Index: 0,
ConsensusData: 2083236893,
NextConsensus: nextConsensus,
Script: transaction.Witness{
InvocationScript: []byte{},
VerificationScript: []byte{byte(opcode.PUSHT)},
},
}
rawScript, err := smartcontract.CreateMultiSigRedeemScript(
len(cfg.StandbyValidators)/2+1,
validators,
)
if err != nil {
return nil, err
}
scriptOut := hash.Hash160(rawScript)
b := &block.Block{
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Base: base,
Transactions: []*transaction.Transaction{
{
Type: transaction.MinerType,
Data: &transaction.MinerTX{
Nonce: 2083236893,
},
Attributes: []transaction.Attribute{},
Inputs: []transaction.Input{},
Outputs: []transaction.Output{},
Scripts: []transaction.Witness{},
},
&governingTokenTX,
&utilityTokenTX,
{
Type: transaction.IssueType,
Data: &transaction.IssueTX{}, // no fields.
Inputs: []transaction.Input{},
Outputs: []transaction.Output{
{
AssetID: governingTokenTX.Hash(),
Amount: governingTokenTX.Data.(*transaction.RegisterTX).Amount,
ScriptHash: scriptOut,
},
},
Scripts: []transaction.Witness{
{
InvocationScript: []byte{},
VerificationScript: []byte{byte(opcode.PUSHT)},
},
},
},
},
}
if err = b.RebuildMerkleRoot(); err != nil {
return nil, err
}
return b, nil
}
func init() {
admin := hash.Hash160([]byte{byte(opcode.PUSHT)})
registerTX := &transaction.RegisterTX{
AssetType: transaction.GoverningToken,
Name: "[{\"lang\":\"zh-CN\",\"name\":\"小蚁股\"},{\"lang\":\"en\",\"name\":\"AntShare\"}]",
Amount: util.Fixed8FromInt64(100000000),
Precision: 0,
Admin: admin,
}
governingTokenTX = transaction.Transaction{
Type: transaction.RegisterType,
Data: registerTX,
Attributes: []transaction.Attribute{},
Inputs: []transaction.Input{},
Outputs: []transaction.Output{},
Scripts: []transaction.Witness{},
}
admin = hash.Hash160([]byte{byte(opcode.PUSHF)})
registerTX = &transaction.RegisterTX{
AssetType: transaction.UtilityToken,
Name: "[{\"lang\":\"zh-CN\",\"name\":\"小蚁币\"},{\"lang\":\"en\",\"name\":\"AntCoin\"}]",
Amount: calculateUtilityAmount(),
Precision: 8,
Admin: admin,
}
utilityTokenTX = transaction.Transaction{
Type: transaction.RegisterType,
Data: registerTX,
Attributes: []transaction.Attribute{},
Inputs: []transaction.Input{},
Outputs: []transaction.Output{},
Scripts: []transaction.Witness{},
}
}
// GoverningTokenID returns the governing token (NEO) hash.
func GoverningTokenID() util.Uint256 {
return governingTokenTX.Hash()
}
// UtilityTokenID returns the utility token (GAS) hash.
func UtilityTokenID() util.Uint256 {
return utilityTokenTX.Hash()
}
func getValidators(cfg config.ProtocolConfiguration) ([]*keys.PublicKey, error) {
validators := make([]*keys.PublicKey, len(cfg.StandbyValidators))
for i, pubKeyStr := range cfg.StandbyValidators {
pubKey, err := keys.NewPublicKeyFromString(pubKeyStr)
if err != nil {
return nil, err
}
validators[i] = pubKey
}
return validators, nil
}
func getNextConsensusAddress(validators []*keys.PublicKey) (val util.Uint160, err error) {
vlen := len(validators)
raw, err := smartcontract.CreateMultiSigRedeemScript(
vlen-(vlen-1)/3,
validators,
)
if err != nil {
return val, err
}
return hash.Hash160(raw), nil
}
func calculateUtilityAmount() util.Fixed8 {
sum := 0
for i := 0; i < len(genAmount); i++ {
sum += genAmount[i]
}
return util.Fixed8FromInt64(int64(sum * decrementInterval))
}
// headerSliceReverse reverses the given slice of *Header.
func headerSliceReverse(dest []*block.Header) {
for i, j := 0, len(dest)-1; i < j; i, j = i+1, j-1 {
dest[i], dest[j] = dest[j], dest[i]
}
}