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50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
package state
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import (
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"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm/emit"
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"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
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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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ID int32 `json:"id"`
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UpdateCounter uint16 `json:"updatecounter"`
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Hash util.Uint160 `json:"hash"`
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Script []byte `json:"script"`
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Manifest manifest.Manifest `json:"manifest"`
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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.ID = int32(br.ReadU32LE())
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cs.UpdateCounter = br.ReadU16LE()
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cs.Hash.DecodeBinary(br)
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cs.Script = br.ReadVarBytes()
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cs.Manifest.DecodeBinary(br)
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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.WriteU32LE(uint32(cs.ID))
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bw.WriteU16LE(cs.UpdateCounter)
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cs.Hash.EncodeBinary(bw)
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bw.WriteVarBytes(cs.Script)
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cs.Manifest.EncodeBinary(bw)
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}
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// CreateContractHash creates deployed contract hash from transaction sender
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// and contract script.
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func CreateContractHash(sender util.Uint160, script []byte) util.Uint160 {
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w := io.NewBufBinWriter()
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emit.Opcodes(w.BinWriter, opcode.ABORT)
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emit.Bytes(w.BinWriter, sender.BytesBE())
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emit.Bytes(w.BinWriter, script)
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if w.Err != nil {
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panic(w.Err)
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}
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return hash.Hash160(w.Bytes())
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}
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