package result import ( "encoding/json" "fmt" "strings" "github.com/coreos/go-semver/semver" "github.com/nspcc-dev/neo-go/pkg/config" "github.com/nspcc-dev/neo-go/pkg/config/netmode" "github.com/nspcc-dev/neo-go/pkg/encoding/fixedn" ) type ( // Version model used for reporting server version // info. Version struct { // Magic contains network magic. // Deprecated: use Protocol.StateRootInHeader instead Magic netmode.Magic TCPPort uint16 WSPort uint16 Nonce uint32 UserAgent string Protocol Protocol // StateRootInHeader is true if state root is contained in the block header. // Deprecated: use Protocol.StateRootInHeader instead StateRootInHeader bool } // Protocol represents network-dependent parameters. Protocol struct { AddressVersion byte Network netmode.Magic MillisecondsPerBlock int MaxTraceableBlocks uint32 MaxValidUntilBlockIncrement uint32 MaxTransactionsPerBlock uint16 MemoryPoolMaxTransactions int ValidatorsCount byte InitialGasDistribution fixedn.Fixed8 // StateRootInHeader is true if state root is contained in block header. StateRootInHeader bool } ) type ( // versionMarshallerAux is an auxiliary struct used for Version JSON marshalling. versionMarshallerAux struct { Magic netmode.Magic `json:"network"` TCPPort uint16 `json:"tcpport"` WSPort uint16 `json:"wsport,omitempty"` Nonce uint32 `json:"nonce"` UserAgent string `json:"useragent"` Protocol protocolMarshallerAux `json:"protocol"` StateRootInHeader bool `json:"staterootinheader,omitempty"` } // protocolMarshallerAux is an auxiliary struct used for Protocol JSON marshalling. protocolMarshallerAux struct { AddressVersion byte `json:"addressversion"` Network netmode.Magic `json:"network"` MillisecondsPerBlock int `json:"msperblock"` MaxTraceableBlocks uint32 `json:"maxtraceableblocks"` MaxValidUntilBlockIncrement uint32 `json:"maxvaliduntilblockincrement"` MaxTransactionsPerBlock uint16 `json:"maxtransactionsperblock"` MemoryPoolMaxTransactions int `json:"memorypoolmaxtransactions"` ValidatorsCount byte `json:"validatorscount"` InitialGasDistribution int64 `json:"initialgasdistribution"` StateRootInHeader bool `json:"staterootinheader,omitempty"` } // versionUnmarshallerAux is an auxiliary struct used for Version JSON unmarshalling. versionUnmarshallerAux struct { Magic netmode.Magic `json:"network"` TCPPort uint16 `json:"tcpport"` WSPort uint16 `json:"wsport,omitempty"` Nonce uint32 `json:"nonce"` UserAgent string `json:"useragent"` Protocol protocolUnmarshallerAux `json:"protocol"` StateRootInHeader bool `json:"staterootinheader,omitempty"` } // protocolUnmarshallerAux is an auxiliary struct used for Protocol JSON unmarshalling. protocolUnmarshallerAux struct { AddressVersion byte `json:"addressversion"` Network netmode.Magic `json:"network"` MillisecondsPerBlock int `json:"msperblock"` MaxTraceableBlocks uint32 `json:"maxtraceableblocks"` MaxValidUntilBlockIncrement uint32 `json:"maxvaliduntilblockincrement"` MaxTransactionsPerBlock uint16 `json:"maxtransactionsperblock"` MemoryPoolMaxTransactions int `json:"memorypoolmaxtransactions"` ValidatorsCount byte `json:"validatorscount"` InitialGasDistribution json.RawMessage `json:"initialgasdistribution"` StateRootInHeader bool `json:"staterootinheader,omitempty"` } ) // latestNonBreakingVersion is a latest NeoGo revision that keeps older RPC // clients compatibility with newer RPC servers (https://github.com/nspcc-dev/neo-go/pull/2435). var latestNonBreakingVersion = *semver.New("0.98.5") // MarshalJSON implements the json marshaller interface. func (v *Version) MarshalJSON() ([]byte, error) { aux := versionMarshallerAux{ Magic: v.Magic, TCPPort: v.TCPPort, WSPort: v.WSPort, Nonce: v.Nonce, UserAgent: v.UserAgent, Protocol: protocolMarshallerAux{ AddressVersion: v.Protocol.AddressVersion, Network: v.Protocol.Network, MillisecondsPerBlock: v.Protocol.MillisecondsPerBlock, MaxTraceableBlocks: v.Protocol.MaxTraceableBlocks, MaxValidUntilBlockIncrement: v.Protocol.MaxValidUntilBlockIncrement, MaxTransactionsPerBlock: v.Protocol.MaxTransactionsPerBlock, MemoryPoolMaxTransactions: v.Protocol.MemoryPoolMaxTransactions, ValidatorsCount: v.Protocol.ValidatorsCount, InitialGasDistribution: int64(v.Protocol.InitialGasDistribution), StateRootInHeader: v.Protocol.StateRootInHeader, }, StateRootInHeader: v.StateRootInHeader, } return json.Marshal(aux) } // UnmarshalJSON implements the json unmarshaller interface. func (v *Version) UnmarshalJSON(data []byte) error { var aux versionUnmarshallerAux err := json.Unmarshal(data, &aux) if err != nil { return err } v.Magic = aux.Magic v.TCPPort = aux.TCPPort v.WSPort = aux.WSPort v.Nonce = aux.Nonce v.UserAgent = aux.UserAgent v.Protocol.AddressVersion = aux.Protocol.AddressVersion v.Protocol.Network = aux.Protocol.Network v.Protocol.MillisecondsPerBlock = aux.Protocol.MillisecondsPerBlock v.Protocol.MaxTraceableBlocks = aux.Protocol.MaxTraceableBlocks v.Protocol.MaxValidUntilBlockIncrement = aux.Protocol.MaxValidUntilBlockIncrement v.Protocol.MaxTransactionsPerBlock = aux.Protocol.MaxTransactionsPerBlock v.Protocol.MemoryPoolMaxTransactions = aux.Protocol.MemoryPoolMaxTransactions v.Protocol.ValidatorsCount = aux.Protocol.ValidatorsCount v.Protocol.StateRootInHeader = aux.Protocol.StateRootInHeader v.StateRootInHeader = aux.StateRootInHeader if len(aux.Protocol.InitialGasDistribution) == 0 { return nil } if strings.HasPrefix(v.UserAgent, config.UserAgentWrapper+config.UserAgentPrefix) { ver, err := userAgentToVersion(v.UserAgent) if err == nil && ver.Compare(latestNonBreakingVersion) <= 0 { err := json.Unmarshal(aux.Protocol.InitialGasDistribution, &v.Protocol.InitialGasDistribution) if err != nil { return fmt.Errorf("failed to unmarshal InitialGASDistribution into fixed8: %w", err) } return nil } } var val int64 err = json.Unmarshal(aux.Protocol.InitialGasDistribution, &val) if err != nil { return fmt.Errorf("failed to unmarshal InitialGASDistribution into int64: %w", err) } v.Protocol.InitialGasDistribution = fixedn.Fixed8(val) return nil } func userAgentToVersion(userAgent string) (*semver.Version, error) { verStr := strings.Trim(userAgent, config.UserAgentWrapper) verStr = strings.TrimPrefix(verStr, config.UserAgentPrefix) ver, err := semver.NewVersion(verStr) if err != nil { return nil, fmt.Errorf("can't retrieve neo-go version from UserAgent: %w", err) } return ver, nil }