78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
package state
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import (
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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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// Contract holds information about a smart contract in the NEO blockchain.
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type Contract 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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// DecodeBinary implements Serializable interface.
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func (cs *Contract) DecodeBinary(br *io.BinReader) {
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cs.Script = br.ReadVarBytes()
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br.ReadArray(&cs.ParamList)
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br.ReadLE(&cs.ReturnType)
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br.ReadLE(&cs.Properties)
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cs.Name = br.ReadString()
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cs.CodeVersion = br.ReadString()
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cs.Author = br.ReadString()
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cs.Email = br.ReadString()
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cs.Description = br.ReadString()
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cs.createHash()
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}
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// EncodeBinary implements Serializable interface.
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func (cs *Contract) EncodeBinary(bw *io.BinWriter) {
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bw.WriteVarBytes(cs.Script)
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bw.WriteArray(cs.ParamList)
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bw.WriteLE(cs.ReturnType)
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bw.WriteLE(cs.Properties)
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bw.WriteString(cs.Name)
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bw.WriteString(cs.CodeVersion)
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bw.WriteString(cs.Author)
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bw.WriteString(cs.Email)
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bw.WriteString(cs.Description)
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}
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// ScriptHash returns a contract script hash.
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func (cs *Contract) ScriptHash() util.Uint160 {
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if cs.scriptHash.Equals(util.Uint160{}) {
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cs.createHash()
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}
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return cs.scriptHash
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}
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// createHash creates contract script hash.
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func (cs *Contract) createHash() {
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cs.scriptHash = hash.Hash160(cs.Script)
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}
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// HasStorage checks whether the contract has storage property set.
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func (cs *Contract) 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 *Contract) 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 *Contract) IsPayable() bool {
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return (cs.Properties & smartcontract.IsPayable) != 0
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}
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