76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
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package context
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import (
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"encoding/hex"
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"encoding/json"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util"
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)
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// Item represents a transaction context item.
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type Item struct {
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Script util.Uint160
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Parameters []smartcontract.Parameter
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Signatures map[string][]byte
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}
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type itemAux struct {
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Script util.Uint160 `json:"script"`
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Parameters []smartcontract.Parameter `json:"parameters"`
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Signatures map[string]string `json:"signatures"`
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}
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// GetSignature returns signature for pub if present.
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func (it *Item) GetSignature(pub *keys.PublicKey) []byte {
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return it.Signatures[hex.EncodeToString(pub.Bytes())]
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}
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// AddSignature adds a signature for pub.
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func (it *Item) AddSignature(pub *keys.PublicKey, sig []byte) {
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pubHex := hex.EncodeToString(pub.Bytes())
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it.Signatures[pubHex] = sig
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}
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// MarshalJSON implements json.Marshaler interface.
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func (it Item) MarshalJSON() ([]byte, error) {
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ci := itemAux{
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Script: it.Script,
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Parameters: it.Parameters,
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Signatures: make(map[string]string, len(it.Signatures)),
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}
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for key, sig := range it.Signatures {
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ci.Signatures[key] = hex.EncodeToString(sig)
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}
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return json.Marshal(ci)
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}
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// UnmarshalJSON implements json.Unmarshaler interface.
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func (it *Item) UnmarshalJSON(data []byte) error {
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ci := new(itemAux)
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if err := json.Unmarshal(data, ci); err != nil {
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return err
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}
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sigs := make(map[string][]byte, len(ci.Signatures))
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for keyHex, sigHex := range ci.Signatures {
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_, err := keys.NewPublicKeyFromString(keyHex)
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if err != nil {
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return err
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}
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sig, err := hex.DecodeString(sigHex)
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if err != nil {
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return err
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}
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sigs[keyHex] = sig
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}
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it.Signatures = sigs
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it.Script = ci.Script
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it.Parameters = ci.Parameters
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return nil
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}
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