package core import ( "time" "github.com/nspcc-dev/neo-go/pkg/config" "github.com/nspcc-dev/neo-go/pkg/core/block" "github.com/nspcc-dev/neo-go/pkg/core/transaction" "github.com/nspcc-dev/neo-go/pkg/crypto/hash" "github.com/nspcc-dev/neo-go/pkg/crypto/keys" "github.com/nspcc-dev/neo-go/pkg/smartcontract" "github.com/nspcc-dev/neo-go/pkg/util" "github.com/nspcc-dev/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] } }