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genesis.go
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genesis.go
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package kernel
import (
"encoding/json"
"fmt"
"os"
"time"
"github.com/MixinNetwork/mixin/common"
"github.com/MixinNetwork/mixin/config"
"github.com/MixinNetwork/mixin/crypto"
)
const (
MinimumNodeCount = 7
)
type Genesis struct {
Epoch int64 `json:"epoch"`
Nodes []*struct {
Signer common.Address `json:"signer"`
Payee common.Address `json:"payee"`
Balance common.Integer `json:"balance"`
} `json:"nodes"`
Domains []*struct {
Signer common.Address `json:"signer"`
Balance common.Integer `json:"balance"`
} `json:"domains"`
}
func (node *Node) LoadGenesis(configDir string) error {
gns, err := readGenesis(configDir + "/genesis.json")
if err != nil {
return err
}
data, err := json.Marshal(gns)
if err != nil {
return err
}
node.Epoch = uint64(time.Unix(gns.Epoch, 0).UnixNano())
node.networkId = crypto.NewHash(data)
node.IdForNetwork = node.Signer.Hash().ForNetwork(node.networkId)
for _, in := range gns.Nodes {
id := in.Signer.Hash().ForNetwork(node.networkId)
node.genesisNodesMap[id] = true
node.genesisNodes = append(node.genesisNodes, id)
}
rounds, snapshots, transactions, err := buildGenesisSnapshots(node.networkId, node.Epoch, gns)
if err != nil {
return err
}
loaded, err := node.persistStore.CheckGenesisLoad(snapshots)
if err != nil || loaded {
return err
}
return node.persistStore.LoadGenesis(rounds, snapshots, transactions)
}
func buildGenesisSnapshots(networkId crypto.Hash, epoch uint64, gns *Genesis) ([]*common.Round, []*common.SnapshotWithTopologicalOrder, []*common.VersionedTransaction, error) {
var snapshots []*common.SnapshotWithTopologicalOrder
var transactions []*common.VersionedTransaction
cacheRounds := make(map[crypto.Hash]*CacheRound)
for i, in := range gns.Nodes {
si := crypto.NewHash([]byte(in.Signer.String() + "NODEACCEPT"))
seed := append(si[:], si[:]...)
script := common.NewThresholdScript(uint8(len(gns.Nodes)*2/3 + 1))
accounts := []*common.Address{}
for _, d := range gns.Nodes {
accounts = append(accounts, &d.Signer)
}
tx := common.NewTransaction(common.XINAssetId)
tx.Inputs = []*common.Input{{Genesis: networkId[:]}}
tx.AddOutputWithType(common.OutputTypeNodeAccept, accounts, script, pledgeAmount(0), seed)
tx.Extra = append(in.Signer.PublicSpendKey[:], in.Payee.PublicSpendKey[:]...)
nodeId := in.Signer.Hash().ForNetwork(networkId)
snapshot := common.Snapshot{
Version: common.SnapshotVersion,
NodeId: nodeId,
RoundNumber: 0,
Timestamp: epoch,
}
signed := tx.AsLatestVersion()
if networkId.String() == config.MainnetId {
snapshot.Version = 0
signed.Version = 1
signed, _ = common.UnmarshalVersionedTransaction(signed.Marshal())
}
snapshot.Transaction = signed.PayloadHash()
snapshot.Hash = snapshot.PayloadHash()
topo := &common.SnapshotWithTopologicalOrder{
Snapshot: snapshot,
TopologicalOrder: uint64(i),
}
snapshots = append(snapshots, topo)
transactions = append(transactions, signed)
cacheRounds[snapshot.NodeId] = &CacheRound{
NodeId: snapshot.NodeId,
Number: 0,
Snapshots: []*common.Snapshot{&snapshot},
}
}
domain := gns.Domains[0]
if in := gns.Nodes[0]; domain.Signer.String() != in.Signer.String() {
err := fmt.Errorf("invalid genesis domain input account %s %s", domain.Signer.String(), in.Signer.String())
return nil, nil, nil, err
}
topo, signed := buildDomainSnapshot(networkId, epoch, domain.Signer, gns)
snapshots = append(snapshots, topo)
transactions = append(transactions, signed)
snap := &topo.Snapshot
snap.Hash = snap.PayloadHash()
cacheRounds[topo.NodeId].Snapshots = append(cacheRounds[topo.NodeId].Snapshots, snap)
rounds := make([]*common.Round, 0)
for i, in := range gns.Nodes {
id := in.Signer.Hash().ForNetwork(networkId)
external := gns.Nodes[0].Signer.Hash().ForNetwork(networkId)
if i != len(gns.Nodes)-1 {
external = gns.Nodes[i+1].Signer.Hash().ForNetwork(networkId)
}
selfFinal := cacheRounds[id].asFinal()
externalFinal := cacheRounds[external].asFinal()
rounds = append(rounds, &common.Round{
Hash: selfFinal.Hash,
NodeId: selfFinal.NodeId,
Number: selfFinal.Number,
Timestamp: selfFinal.Start,
})
rounds = append(rounds, &common.Round{
Hash: selfFinal.NodeId,
NodeId: selfFinal.NodeId,
Number: selfFinal.Number + 1,
References: &common.RoundLink{
Self: selfFinal.Hash,
External: externalFinal.Hash,
},
})
}
return rounds, snapshots, transactions, nil
}
func buildDomainSnapshot(networkId crypto.Hash, epoch uint64, domain common.Address, gns *Genesis) (*common.SnapshotWithTopologicalOrder, *common.VersionedTransaction) {
si := crypto.NewHash([]byte(domain.String() + "DOMAINACCEPT"))
seed := append(si[:], si[:]...)
script := common.NewThresholdScript(uint8(len(gns.Nodes)*2/3 + 1))
accounts := []*common.Address{}
for _, d := range gns.Nodes {
accounts = append(accounts, &d.Signer)
}
tx := common.NewTransaction(common.XINAssetId)
tx.Inputs = []*common.Input{{Genesis: networkId[:]}}
tx.AddOutputWithType(common.OutputTypeDomainAccept, accounts, script, common.NewInteger(50000), seed)
tx.Extra = make([]byte, len(domain.PublicSpendKey))
copy(tx.Extra, domain.PublicSpendKey[:])
signed := tx.AsLatestVersion()
if networkId.String() == config.MainnetId {
signed.Version = 1
signed, _ = common.UnmarshalVersionedTransaction(signed.Marshal())
}
nodeId := domain.Hash().ForNetwork(networkId)
snapshot := common.Snapshot{
Version: common.SnapshotVersion,
NodeId: nodeId,
Transaction: signed.PayloadHash(),
RoundNumber: 0,
Timestamp: epoch + 1,
}
if networkId.String() == config.MainnetId {
snapshot.Version = 0
}
return &common.SnapshotWithTopologicalOrder{
Snapshot: snapshot,
TopologicalOrder: uint64(len(gns.Nodes)),
}, signed
}
func readGenesis(path string) (*Genesis, error) {
f, err := os.ReadFile(path)
if err != nil {
return nil, err
}
var gns Genesis
err = json.Unmarshal(f, &gns)
if err != nil {
return nil, err
}
if len(gns.Nodes) < MinimumNodeCount {
return nil, fmt.Errorf("invalid genesis inputs number %d/%d", len(gns.Nodes), MinimumNodeCount)
}
inputsFilter := make(map[string]bool)
for _, in := range gns.Nodes {
_, err := common.NewAddressFromString(in.Signer.String())
if err != nil {
return nil, err
}
if in.Balance.Cmp(pledgeAmount(0)) != 0 {
return nil, fmt.Errorf("invalid genesis node input amount %s", in.Balance.String())
}
if inputsFilter[in.Signer.String()] {
return nil, fmt.Errorf("duplicated genesis node input %s", in.Signer.String())
}
privateView := in.Signer.PublicSpendKey.DeterministicHashDerive()
if privateView.Public() != in.Signer.PublicViewKey {
return nil, fmt.Errorf("invalid node key format %s %s", privateView.Public().String(), in.Signer.PublicViewKey.String())
}
privateView = in.Payee.PublicSpendKey.DeterministicHashDerive()
if privateView.Public() != in.Payee.PublicViewKey {
return nil, fmt.Errorf("invalid node key format %s %s", privateView.Public().String(), in.Payee.PublicViewKey.String())
}
}
if len(gns.Domains) != 1 {
return nil, fmt.Errorf("invalid genesis domain inputs count %d", len(gns.Domains))
}
domain := gns.Domains[0]
if domain.Signer.String() != gns.Nodes[0].Signer.String() {
return nil, fmt.Errorf("invalid genesis domain input account %s %s", domain.Signer.String(), gns.Nodes[0].Signer.String())
}
if domain.Balance.Cmp(common.NewInteger(50000)) != 0 {
return nil, fmt.Errorf("invalid genesis domain input amount %s", domain.Balance.String())
}
return &gns, nil
}