neoneo-go/pkg/core/util.go
Roman Khimov a4294f4b5f core: export UtilityTokenID and GoverningTokenID
Both are very useful outside of the core, this change also makes respective
transactions initialize with the package as they don't depend on any kind of
input and it makes no sense recreating them again and again on every use.
2020-02-19 12:13:27 +03:00

188 lines
5 KiB
Go

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
)
// 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
}
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{
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]
}
}