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https://github.com/nspcc-dev/neo-go.git
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238c590ddb
PublishTX only had one of these flags, but newer contracts (created via the interop function) can have more and these flags are aggregated into one field that uses PropertyState enumeration (it's used to publish contract, so supposedly it's also a nice choice for contract state storage).
104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
package core
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import (
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"github.com/CityOfZion/neo-go/pkg/core/storage"
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"github.com/CityOfZion/neo-go/pkg/crypto/hash"
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"github.com/CityOfZion/neo-go/pkg/io"
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"github.com/CityOfZion/neo-go/pkg/smartcontract"
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"github.com/CityOfZion/neo-go/pkg/util"
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)
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// Contracts is a mapping between scripthash and ContractState.
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type Contracts map[util.Uint160]*ContractState
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// ContractState holds information about a smart contract in the NEO blockchain.
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type ContractState struct {
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Script []byte
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ParamList []smartcontract.ParamType
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ReturnType smartcontract.ParamType
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Properties smartcontract.PropertyState
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Name string
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CodeVersion string
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Author string
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Email string
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Description string
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scriptHash util.Uint160
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}
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// commit flushes all contracts to the given storage.Batch.
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func (a Contracts) commit(b storage.Batch) error {
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buf := io.NewBufBinWriter()
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for hash, contract := range a {
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contract.EncodeBinary(buf.BinWriter)
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if buf.Err != nil {
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return buf.Err
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}
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key := storage.AppendPrefix(storage.STContract, hash.Bytes())
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b.Put(key, buf.Bytes())
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buf.Reset()
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}
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return nil
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}
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// DecodeBinary implements Serializable interface.
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func (a *ContractState) DecodeBinary(br *io.BinReader) {
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a.Script = br.ReadBytes()
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paramBytes := br.ReadBytes()
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a.ParamList = make([]smartcontract.ParamType, len(paramBytes))
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for k := range paramBytes {
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a.ParamList[k] = smartcontract.ParamType(paramBytes[k])
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}
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br.ReadLE(&a.ReturnType)
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br.ReadLE(&a.Properties)
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a.Name = br.ReadString()
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a.CodeVersion = br.ReadString()
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a.Author = br.ReadString()
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a.Email = br.ReadString()
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a.Description = br.ReadString()
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a.createHash()
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}
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// EncodeBinary implements Serializable interface.
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func (a *ContractState) EncodeBinary(bw *io.BinWriter) {
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bw.WriteBytes(a.Script)
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bw.WriteVarUint(uint64(len(a.ParamList)))
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for k := range a.ParamList {
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bw.WriteLE(a.ParamList[k])
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}
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bw.WriteLE(a.ReturnType)
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bw.WriteLE(a.Properties)
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bw.WriteString(a.Name)
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bw.WriteString(a.CodeVersion)
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bw.WriteString(a.Author)
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bw.WriteString(a.Email)
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bw.WriteString(a.Description)
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}
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// ScriptHash returns a contract script hash.
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func (a *ContractState) ScriptHash() util.Uint160 {
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if a.scriptHash.Equals(util.Uint160{}) {
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a.createHash()
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}
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return a.scriptHash
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}
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// createHash creates contract script hash.
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func (a *ContractState) createHash() {
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a.scriptHash = hash.Hash160(a.Script)
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}
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// HasStorage checks whether the contract has storage property set.
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func (cs *ContractState) HasStorage() bool {
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return (cs.Properties & smartcontract.HasStorage) != 0
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}
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// HasDynamicInvoke checks whether the contract has dynamic invoke property set.
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func (cs *ContractState) HasDynamicInvoke() bool {
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return (cs.Properties & smartcontract.HasDynamicInvoke) != 0
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}
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// IsPayable checks whether the contract has payable property set.
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func (cs *ContractState) IsPayable() bool {
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return (cs.Properties & smartcontract.IsPayable) != 0
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}
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