neo-go/pkg/core/transaction/signer.go

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package transaction
import (
"errors"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/util"
)
// The maximum number of AllowedContracts or AllowedGroups.
const maxSubitems = 16
// Signer implements a Transaction signer.
type Signer struct {
Account util.Uint160 `json:"account"`
Scopes WitnessScope `json:"scopes"`
AllowedContracts []util.Uint160 `json:"allowedcontracts,omitempty"`
AllowedGroups []*keys.PublicKey `json:"allowedgroups,omitempty"`
Rules []WitnessRule `json:"rules,omitempty"`
}
// EncodeBinary implements Serializable interface.
func (c *Signer) EncodeBinary(bw *io.BinWriter) {
bw.WriteBytes(c.Account[:])
bw.WriteB(byte(c.Scopes))
if c.Scopes&CustomContracts != 0 {
bw.WriteArray(c.AllowedContracts)
}
if c.Scopes&CustomGroups != 0 {
bw.WriteArray(c.AllowedGroups)
}
if c.Scopes&Rules != 0 {
bw.WriteArray(c.Rules)
}
}
// DecodeBinary implements Serializable interface.
func (c *Signer) DecodeBinary(br *io.BinReader) {
br.ReadBytes(c.Account[:])
c.Scopes = WitnessScope(br.ReadB())
if c.Scopes & ^(Global|CalledByEntry|CustomContracts|CustomGroups|None) != 0 {
br.Err = errors.New("unknown witness scope")
return
}
if c.Scopes&Global != 0 && c.Scopes != Global {
br.Err = errors.New("global scope can not be combined with other scopes")
return
}
if c.Scopes&CustomContracts != 0 {
br.ReadArray(&c.AllowedContracts, maxSubitems)
}
if c.Scopes&CustomGroups != 0 {
br.ReadArray(&c.AllowedGroups, maxSubitems)
}
if c.Scopes&Rules != 0 {
br.ReadArray(&c.Rules, maxSubitems)
}
}