github.com/ava-labs/avalanchego@v1.11.11/vms/avm/txs/import_tx.go (about)

     1  // Copyright (C) 2019-2024, Ava Labs, Inc. All rights reserved.
     2  // See the file LICENSE for licensing terms.
     3  
     4  package txs
     5  
     6  import (
     7  	"github.com/ava-labs/avalanchego/ids"
     8  	"github.com/ava-labs/avalanchego/utils/set"
     9  	"github.com/ava-labs/avalanchego/vms/components/avax"
    10  	"github.com/ava-labs/avalanchego/vms/secp256k1fx"
    11  )
    12  
    13  var (
    14  	_ UnsignedTx             = (*ImportTx)(nil)
    15  	_ secp256k1fx.UnsignedTx = (*ImportTx)(nil)
    16  )
    17  
    18  // ImportTx is a transaction that imports an asset from another blockchain.
    19  type ImportTx struct {
    20  	BaseTx `serialize:"true"`
    21  
    22  	// Which chain to consume the funds from
    23  	SourceChain ids.ID `serialize:"true" json:"sourceChain"`
    24  
    25  	// The inputs to this transaction
    26  	ImportedIns []*avax.TransferableInput `serialize:"true" json:"importedInputs"`
    27  }
    28  
    29  // InputUTXOs track which UTXOs this transaction is consuming.
    30  func (t *ImportTx) InputUTXOs() []*avax.UTXOID {
    31  	utxos := t.BaseTx.InputUTXOs()
    32  	for _, in := range t.ImportedIns {
    33  		in.Symbol = true
    34  		utxos = append(utxos, &in.UTXOID)
    35  	}
    36  	return utxos
    37  }
    38  
    39  func (t *ImportTx) InputIDs() set.Set[ids.ID] {
    40  	inputs := t.BaseTx.InputIDs()
    41  	for _, in := range t.ImportedIns {
    42  		inputs.Add(in.InputID())
    43  	}
    44  	return inputs
    45  }
    46  
    47  // NumCredentials returns the number of expected credentials
    48  func (t *ImportTx) NumCredentials() int {
    49  	return t.BaseTx.NumCredentials() + len(t.ImportedIns)
    50  }
    51  
    52  func (t *ImportTx) Visit(v Visitor) error {
    53  	return v.ImportTx(t)
    54  }