mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-29 19:27:36 +00:00
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
package core
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import (
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"errors"
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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/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/opcode"
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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 := validatorsFromConfig(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.Header{
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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()) * 1000, // Milliseconds.
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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.PUSH1)},
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},
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StateRootEnabled: cfg.StateRootInHeader,
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}
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b := &block.Block{
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Header: base,
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Transactions: []*transaction.Transaction{},
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}
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b.RebuildMerkleRoot()
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return b, nil
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}
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func validatorsFromConfig(cfg config.ProtocolConfiguration) ([]*keys.PublicKey, error) {
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vs, err := committeeFromConfig(cfg)
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if err != nil {
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return nil, err
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}
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return vs[:cfg.ValidatorsCount], nil
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}
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func committeeFromConfig(cfg config.ProtocolConfiguration) ([]*keys.PublicKey, error) {
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if len(cfg.StandbyCommittee) < cfg.ValidatorsCount {
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return nil, errors.New("validators count can be less than the size of StandbyCommittee")
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}
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validators := make([]*keys.PublicKey, len(cfg.StandbyCommittee))
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for i := range validators {
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pubKey, err := keys.NewPublicKeyFromString(cfg.StandbyCommittee[i])
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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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raw, err := smartcontract.CreateDefaultMultiSigRedeemScript(validators)
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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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// 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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