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transfer.go
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transfer.go
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package currency
import (
"github.com/ProtoconNet/mitum-currency/v3/common"
"github.com/ProtoconNet/mitum2/base"
"github.com/ProtoconNet/mitum2/util"
"github.com/ProtoconNet/mitum2/util/hint"
"github.com/ProtoconNet/mitum2/util/valuehash"
"github.com/pkg/errors"
)
var (
TransferFactHint = hint.MustNewHint("mitum-currency-transfer-operation-fact-v0.0.1")
TransferHint = hint.MustNewHint("mitum-currency-transfer-operation-v0.0.1")
)
var MaxTransferItems uint = 10
type TransferItem interface {
hint.Hinter
util.IsValider
AmountsItem
Bytes() []byte
Receiver() base.Address
Rebuild() TransferItem
}
type TransferFact struct {
base.BaseFact
sender base.Address
items []TransferItem
}
func NewTransferFact(
token []byte,
sender base.Address,
items []TransferItem,
) TransferFact {
bf := base.NewBaseFact(TransferFactHint, token)
fact := TransferFact{
BaseFact: bf,
sender: sender,
items: items,
}
fact.SetHash(fact.GenerateHash())
return fact
}
func (fact TransferFact) Hash() util.Hash {
return fact.BaseFact.Hash()
}
func (fact TransferFact) GenerateHash() util.Hash {
return valuehash.NewSHA256(fact.Bytes())
}
func (fact TransferFact) Bytes() []byte {
its := make([][]byte, len(fact.items))
for i := range fact.items {
its[i] = fact.items[i].Bytes()
}
return util.ConcatBytesSlice(
fact.Token(),
fact.sender.Bytes(),
util.ConcatBytesSlice(its...),
)
}
func (fact TransferFact) IsValid(b []byte) error {
if err := fact.BaseHinter.IsValid(nil); err != nil {
return common.ErrFactInvalid.Wrap(err)
}
if n := len(fact.items); n < 1 {
return common.ErrFactInvalid.Wrap(common.ErrArrayLen.Wrap(errors.Errorf("empty items")))
} else if n > int(MaxTransferItems) {
return common.ErrFactInvalid.Wrap(common.ErrArrayLen.Wrap(errors.Errorf("items, %d over max, %d", n, MaxTransferItems)))
}
if err := util.CheckIsValiders(nil, false, fact.sender); err != nil {
return common.ErrFactInvalid.Wrap(err)
}
foundReceivers := map[string]struct{}{}
for i := range fact.items {
it := fact.items[i]
if err := util.CheckIsValiders(nil, false, it); err != nil {
return common.ErrFactInvalid.Wrap(err)
}
k := it.Receiver().String()
switch _, found := foundReceivers[k]; {
case found:
return common.ErrFactInvalid.Wrap(common.ErrDupVal.Wrap(errors.Errorf("receiver found, %v", it.Receiver())))
case fact.sender.Equal(it.Receiver()):
return common.ErrFactInvalid.Wrap(common.ErrSelfTarget.Wrap(errors.Errorf("receiver account is same with sender account, %v", fact.sender)))
default:
foundReceivers[k] = struct{}{}
}
}
if err := common.IsValidOperationFact(fact, b); err != nil {
return common.ErrFactInvalid.Wrap(err)
}
return nil
}
func (fact TransferFact) Token() base.Token {
return fact.BaseFact.Token()
}
func (fact TransferFact) Sender() base.Address {
return fact.sender
}
func (fact TransferFact) Items() []TransferItem {
return fact.items
}
func (fact TransferFact) Rebuild() TransferFact {
items := make([]TransferItem, len(fact.items))
for i := range fact.items {
it := fact.items[i]
items[i] = it.Rebuild()
}
fact.items = items
fact.SetHash(fact.Hash())
return fact
}
func (fact TransferFact) Addresses() ([]base.Address, error) {
as := make([]base.Address, len(fact.items)+1)
for i := range fact.items {
as[i] = fact.items[i].Receiver()
}
as[len(fact.items)] = fact.Sender()
return as, nil
}
type Transfer struct {
common.BaseOperation
}
func NewTransfer(fact TransferFact) (Transfer, error) {
return Transfer{BaseOperation: common.NewBaseOperation(TransferHint, fact)}, nil
}
func (op *Transfer) HashSign(priv base.Privatekey, networkID base.NetworkID) error {
err := op.Sign(priv, networkID)
if err != nil {
return err
}
return nil
}