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107 lines
3 KiB
Go
107 lines
3 KiB
Go
package transaction
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import (
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"errors"
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"math/big"
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"slices"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// The maximum number of AllowedContracts or AllowedGroups.
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const maxSubitems = 16
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// Signer implements a Transaction signer.
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type Signer struct {
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Account util.Uint160 `json:"account"`
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Scopes WitnessScope `json:"scopes"`
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AllowedContracts []util.Uint160 `json:"allowedcontracts,omitempty"`
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AllowedGroups []*keys.PublicKey `json:"allowedgroups,omitempty"`
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Rules []WitnessRule `json:"rules,omitempty"`
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}
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// EncodeBinary implements the Serializable interface.
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func (c *Signer) EncodeBinary(bw *io.BinWriter) {
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bw.WriteBytes(c.Account[:])
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bw.WriteB(byte(c.Scopes))
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if c.Scopes&CustomContracts != 0 {
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bw.WriteArray(c.AllowedContracts)
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}
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if c.Scopes&CustomGroups != 0 {
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bw.WriteArray(c.AllowedGroups)
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}
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if c.Scopes&Rules != 0 {
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bw.WriteArray(c.Rules)
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}
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}
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// DecodeBinary implements the Serializable interface.
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func (c *Signer) DecodeBinary(br *io.BinReader) {
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br.ReadBytes(c.Account[:])
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c.Scopes = WitnessScope(br.ReadB())
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if c.Scopes & ^(Global|CalledByEntry|CustomContracts|CustomGroups|Rules|None) != 0 {
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br.Err = errors.New("unknown witness scope")
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return
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}
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if c.Scopes&Global != 0 && c.Scopes != Global {
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br.Err = errors.New("global scope can not be combined with other scopes")
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return
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}
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if c.Scopes&CustomContracts != 0 {
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br.ReadArray(&c.AllowedContracts, maxSubitems)
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}
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if c.Scopes&CustomGroups != 0 {
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br.ReadArray(&c.AllowedGroups, maxSubitems)
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}
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if c.Scopes&Rules != 0 {
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br.ReadArray(&c.Rules, maxSubitems)
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}
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}
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// SignersToStackItem converts transaction.Signers to stackitem.Item.
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func SignersToStackItem(signers []Signer) stackitem.Item {
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res := make([]stackitem.Item, len(signers))
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for i, s := range signers {
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contracts := make([]stackitem.Item, len(s.AllowedContracts))
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for j, c := range s.AllowedContracts {
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contracts[j] = stackitem.NewByteArray(c.BytesBE())
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}
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groups := make([]stackitem.Item, len(s.AllowedGroups))
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for j, g := range s.AllowedGroups {
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groups[j] = stackitem.NewByteArray(g.Bytes())
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}
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rules := make([]stackitem.Item, len(s.Rules))
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for j, r := range s.Rules {
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rules[j] = r.ToStackItem()
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}
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res[i] = stackitem.NewArray([]stackitem.Item{
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stackitem.NewByteArray(s.Account.BytesBE()),
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stackitem.NewBigInteger(big.NewInt(int64(s.Scopes))),
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stackitem.NewArray(contracts),
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stackitem.NewArray(groups),
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stackitem.NewArray(rules),
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})
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}
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return stackitem.NewArray(res)
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}
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// Copy creates a deep copy of the Signer.
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func (c *Signer) Copy() *Signer {
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if c == nil {
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return nil
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}
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cp := *c
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cp.AllowedContracts = slices.Clone(c.AllowedContracts)
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cp.AllowedGroups = keys.PublicKeys(c.AllowedGroups).Copy()
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if c.Rules != nil {
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cp.Rules = make([]WitnessRule, len(c.Rules))
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for i, rule := range c.Rules {
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cp.Rules[i] = *rule.Copy()
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}
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}
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return &cp
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}
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