chain: add SubmitPackage API for atomic parents+child relay

chain/bitcoind_client.go

@@ -1,8 +1,10 @@
 package chain
 
 import (
+	"bytes"
 	"container/list"
 	"encoding/hex"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"sync"
@@ -1335,6 +1337,111 @@ func (c *BitcoindClient) LookupInputMempoolSpend(op wire.OutPoint) (
 	return c.chainConn.events.LookupInputSpend(op)
 }
 
+// SubmitPackage broadcasts a parents+child package atomically.
+//
+// `parents` must contain at least one transaction. The returned slice
+// holds the txids of every transaction that entered the mempool.
+//
+// `maxFeeRateBTCPerVByte` caps the effective feerate the node will
+// accept for the entire package, expressed in BTC per virtual byte.
+// Pass nil to leave the limit unset.
+//
+// If the active backend cannot relay packages, ErrUnimplemented is
+// returned.
+//
+//nolint:err113
+func (c *BitcoindClient) SubmitPackage(parents []*wire.MsgTx, child *wire.MsgTx,
+	maxFeeRateBTCPerVByte *float64) (*btcjson.SubmitPackageResult, error) {
+
+	// Sanity check inputs.
+	if len(parents) == 0 {
+		return nil, errors.New("submitpackage: need at least one " +
+			"parent txn")
+	}
+
+	if child == nil {
+		return nil, errors.New("submitpackage: child txn not defined")
+	}
+
+	// Prepare the hex encoded transactions to that we'll add the request.
+	toHex := func(tx *wire.MsgTx) (string, error) {
+		var buf bytes.Buffer
+		if err := tx.Serialize(&buf); err != nil {
+			return "", err
+		}
+
+		return hex.EncodeToString(buf.Bytes()), nil
+	}
+
+	rawTxs := make([]string, 0, len(parents)+1)
+
+	for i, ch := range parents {
+		h, err := toHex(ch)
+		if err != nil {
+			return nil, fmt.Errorf("cannot serialize parent txn "+
+				"%d: %w", i, err)
+		}
+
+		rawTxs = append(rawTxs, h)
+	}
+
+	h, err := toHex(child)
+	if err != nil {
+		return nil, fmt.Errorf("cannot serialize child txn: %w", err)
+	}
+
+	rawTxs = append(rawTxs, h)
+
+	// Parameter 1: The package (array of hex strings).
+	rawTxsJSON, err := json.Marshal(rawTxs)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal raw txs array: %w",
+			err)
+	}
+
+	params := []json.RawMessage{rawTxsJSON}
+
+	// Parameter 2: maxfeerate (optional, numeric, in BTC/kvB)
+	if maxFeeRateBTCPerVByte != nil {
+		// Convert BTC/vByte to BTC/kvB.
+		const btcPerVByteToKvB = 1000
+		maxFeeRateBTCPerKvB := *maxFeeRateBTCPerVByte * btcPerVByteToKvB
+		maxFeeRateJSON, err := json.Marshal(maxFeeRateBTCPerKvB)
+		if err != nil {
+			return nil, fmt.Errorf("failed to marshal "+
+				"maxfeerate: %w", err)
+		}
+
+		params = append(params, maxFeeRateJSON)
+	}
+
+	resp, err := c.chainConn.client.RawRequest("submitpackage", params)
+	if err != nil {
+		if isMethodNotFound(err) {
+			return nil, ErrUnimplemented
+		}
+
+		return nil, err
+	}
+
+	// Unmarshall the response.
+	var result btcjson.SubmitPackageResult
+	if err := result.UnmarshalJSON(resp); err != nil {
+		return nil, err
+	}
+
+	return &result, nil
+}
+
+// isMethodNotFound returns true if err is exactly the JSON‑RPC "method not
+// found" error, regardless of the transport.
+func isMethodNotFound(err error) bool {
+	var rpcErr btcjson.RPCError
+	ok := errors.As(err, &rpcErr)
+
+	return ok && rpcErr.Code == btcjson.ErrRPCMethodNotFound.Code
+}
+
 // resetWatchedFilters empties the maps used to track outpoints, addresses, and
 // txns.
 func (c *BitcoindClient) resetWatchedFilters() {

chain/btcd.go

@@ -639,3 +639,11 @@ func (c *RPCClient) SendRawTransaction(tx *wire.MsgTx,
 
 	return txid, nil
 }
+
+// SubmitPackage is currently unimplemented for btcd. The method is added to
+// satisfy the chain.Interface interface.
+func (c *RPCClient) SubmitPackage(_ []*wire.MsgTx, _ *wire.MsgTx, _ *float64) (
+	*btcjson.SubmitPackageResult, error) {
+
+	return nil, ErrUnimplemented
+}

chain/chainservice.go

@@ -1,6 +1,8 @@
 package chain
 
 import (
+	"context"
+
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/btcutil/gcs"
 	"github.com/btcsuite/btcd/chaincfg"
@@ -14,7 +16,7 @@ import (
 // NeutrinoChainService is an interface that encapsulates all the public
 // methods of a *neutrino.ChainService
 type NeutrinoChainService interface {
-	Start() error
+	Start(context.Context) error
 	GetBlock(chainhash.Hash, ...neutrino.QueryOption) (*btcutil.Block, error)
 	GetBlockHeight(*chainhash.Hash) (int32, error)
 	BestBlock() (*headerfs.BlockStamp, error)

chain/interface.go

@@ -49,6 +49,22 @@ type Interface interface {
 	Notifications() <-chan interface{}
 	BackEnd() string
 	TestMempoolAccept([]*wire.MsgTx, float64) ([]*btcjson.TestMempoolAcceptResult, error)
+
+	// SubmitPackage broadcasts a parents+child package atomically.
+	//
+	// `parents` must contain at least one transaction. The returned slice
+	// holds the txids of every transaction that entered the mempool.
+	//
+	// `maxFeeRateBTCPerVByte` caps the effective feerate the node will
+	// accept for the entire package, expressed in BTC per virtual byte.
+	// Pass nil to leave the limit unset.
+	//
+	// If the active backend cannot relay packages, ErrUnimplemented is
+	// returned.
+	SubmitPackage(parents []*wire.MsgTx, child *wire.MsgTx,
+		maxFeeRateBTCPerVByte *float64) (*btcjson.SubmitPackageResult,
+		error)
+
 	MapRPCErr(err error) error
 }
 

chain/neutrino.go

@@ -1,6 +1,7 @@
 package chain
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"sync"
@@ -102,7 +103,7 @@ func (s *NeutrinoClient) BackEnd() string {
 
 // Start replicates the RPC client's Start method.
 func (s *NeutrinoClient) Start() error {
-	if err := s.CS.Start(); err != nil {
+	if err := s.CS.Start(context.TODO()); err != nil {
 		return fmt.Errorf("error starting chain service: %w", err)
 	}
 
@@ -844,3 +845,11 @@ func (s *NeutrinoClient) MapRPCErr(rpcErr error) error {
 	// If not matched, return the original error wrapped.
 	return fmt.Errorf("%w: %v", ErrUndefined, rpcErr)
 }
+
+// SubmitPackage is currently unimplemented for neutrino. The method is added to
+// satisfy the chain.Interface interface.
+func (s *NeutrinoClient) SubmitPackage(_ []*wire.MsgTx, _ *wire.MsgTx,
+	_ *float64) (*btcjson.SubmitPackageResult, error) {
+
+	return nil, ErrUnimplemented
+}

go.mod

@@ -1,7 +1,7 @@
 module github.com/btcsuite/btcwallet
 
 require (
-	github.com/btcsuite/btcd v0.24.3-0.20250318170759-4f4ea81776d6
+	github.com/btcsuite/btcd v0.25.0-beta.rc1.0.20250925015248-b7d070601def
 	github.com/btcsuite/btcd/btcec/v2 v2.3.5
 	github.com/btcsuite/btcd/btcutil v1.1.6
 	github.com/btcsuite/btcd/btcutil/psbt v1.1.10
@@ -35,26 +35,25 @@ require (
 
 require (
 	github.com/aead/siphash v1.0.1 // indirect
+	github.com/btcsuite/btcd/v2transport v1.0.1 // indirect
 	github.com/btcsuite/go-socks v0.0.0-20170105172521-4720035b7bfd // indirect
 	github.com/decred/dcrd/crypto/blake256 v1.1.0 // indirect
 	github.com/decred/dcrd/lru v1.1.2 // indirect
-	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/kkdai/bstream v1.0.0 // indirect
-	github.com/kr/pretty v0.3.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
 	github.com/lightningnetwork/lnd/clock v1.0.1 // indirect
 	github.com/lightningnetwork/lnd/queue v1.0.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/rogpeppe/go-internal v1.14.1 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	go.etcd.io/bbolt v1.3.11 // indirect
-	go.opentelemetry.io/otel v1.36.0 // indirect
-	golang.org/x/exp v0.0.0-20240909161429-701f63a606c0 // indirect
+	golang.org/x/exp v0.0.0-20250811191247-51f88131bc50 // indirect
 	golang.org/x/sys v0.35.0 // indirect
 	golang.org/x/text v0.28.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250603155806-513f23925822 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
-// If you change this please run `make lint` to see where else it needs to be
-// updated as well.
+// Temporary replace to bump btcd dependency within neutrino.
+replace github.com/lightninglabs/neutrino => github.com/bhandras/neutrino v0.0.0-20251027194105-5cf9b10c1b51
+
 go 1.24.6

go.sum

@@ -1,11 +1,13 @@
 github.com/aead/siphash v1.0.1 h1:FwHfE/T45KPKYuuSAKyyvE+oPWcaQ+CUmFW0bPlM+kg=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
+github.com/bhandras/neutrino v0.0.0-20251027194105-5cf9b10c1b51 h1:/t2/UyxoTuDu3ZeTxqDwK9zoQlHsg2L7RcAphIR/QHs=
+github.com/bhandras/neutrino v0.0.0-20251027194105-5cf9b10c1b51/go.mod h1:iTEN0G118RDQH6fEhIDGvqZsDvC6cPg82DZnUx26k04=
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btcd v0.22.0-beta.0.20220111032746-97732e52810c/go.mod h1:tjmYdS6MLJ5/s0Fj4DbLgSbDHbEqLJrtnHecBFkdz5M=
 github.com/btcsuite/btcd v0.23.5-0.20231215221805-96c9fd8078fd/go.mod h1:nm3Bko6zh6bWP60UxwoT5LzdGJsQJaPo6HjduXq9p6A=
 github.com/btcsuite/btcd v0.24.2/go.mod h1:5C8ChTkl5ejr3WHj8tkQSCmydiMEPB0ZhQhehpq7Dgg=
-github.com/btcsuite/btcd v0.24.3-0.20250318170759-4f4ea81776d6 h1:8n9k3I7e8DkpdQ5YAP4j8ly/LSsbe6qX9vmVbrUGvVw=
-github.com/btcsuite/btcd v0.24.3-0.20250318170759-4f4ea81776d6/go.mod h1:OmM4kFtB0klaG/ZqT86rQiyw/1iyXlJgc3UHClPhhbs=
+github.com/btcsuite/btcd v0.25.0-beta.rc1.0.20250925015248-b7d070601def h1:t2NTKvDXNP71BTEFb9NF0IMz39x0VkyY7YG1fshSLsM=
+github.com/btcsuite/btcd v0.25.0-beta.rc1.0.20250925015248-b7d070601def/go.mod h1:qbPE+pEiR9643E1s1xu57awsRhlCIm1ZIi6FfeRA4KE=
 github.com/btcsuite/btcd/btcec/v2 v2.1.0/go.mod h1:2VzYrv4Gm4apmbVVsSq5bqf1Ec8v56E48Vt0Y/umPgA=
 github.com/btcsuite/btcd/btcec/v2 v2.1.3/go.mod h1:ctjw4H1kknNJmRN4iP1R7bTQ+v3GJkZBd6mui8ZsAZE=
 github.com/btcsuite/btcd/btcec/v2 v2.3.5 h1:dpAlnAwmT1yIBm3exhT1/8iUSD98RDJM5vqJVQDQLiU=
@@ -21,6 +23,8 @@ github.com/btcsuite/btcd/chaincfg/chainhash v1.0.0/go.mod h1:7SFka0XMvUgj3hfZtyd
 github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0 h1:59Kx4K6lzOW5w6nFlA0v5+lk/6sjybR934QNHSJZPTQ=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
+github.com/btcsuite/btcd/v2transport v1.0.1 h1:pIyyyBCPwd087K3Wdb/9tIvUubAQdzTJghjPgzTQVsE=
+github.com/btcsuite/btcd/v2transport v1.0.1/go.mod h1:N6H0HGSElVVJKntzaYHYVbW71DtWDLMw2yhwVRO3ZOE=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
 github.com/btcsuite/btclog v1.0.0 h1:sEkpKJMmfGiyZjADwEIgB1NSwMyfdD1FB8v6+w1T0Ns=
 github.com/btcsuite/btclog v1.0.0/go.mod h1:w7xnGOhwT3lmrS4H3b/D1XAXxvh+tbhUm8xeHN2y3TQ=
@@ -60,8 +64,8 @@ github.com/decred/dcrd/lru v1.1.2 h1:KdCzlkxppuoIDGEvCGah1fZRicrDH36IipvlB1ROkFY
 github.com/decred/dcrd/lru v1.1.2/go.mod h1:gEdCVgXs1/YoBvFWt7Scgknbhwik3FgVSzlnCcXL2N8=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
-github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
-github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -95,14 +99,12 @@ github.com/jrick/logrotate v1.1.2/go.mod h1:f9tdWggSVK3iqavGpyvegq5IhNois7KXmasU
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
 github.com/kkdai/bstream v1.0.0 h1:Se5gHwgp2VT2uHfDrkbbgbgEvV9cimLELwrPJctSjg8=
 github.com/kkdai/bstream v1.0.0/go.mod h1:FDnDOHt5Yx4p3FaHcioFT0QjDOtgUpvjeZqAs+NVZZA=
-github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
-github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
+github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
+github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/lightninglabs/gozmq v0.0.0-20191113021534-d20a764486bf h1:HZKvJUHlcXI/f/O0Avg7t8sqkPo78HFzjmeYFl6DPnc=
 github.com/lightninglabs/gozmq v0.0.0-20191113021534-d20a764486bf/go.mod h1:vxmQPeIQxPf6Jf9rM8R+B4rKBqLA2AjttNxkFBL2Plk=
-github.com/lightninglabs/neutrino v0.16.1 h1:5Kz4ToxncEVkpKC6fwUjXKtFKJhuxlG3sBB3MdJTJjs=
-github.com/lightninglabs/neutrino v0.16.1/go.mod h1:L+5UAccpUdyM7yDgmQySgixf7xmwBgJtOfs/IP26jCs=
 github.com/lightninglabs/neutrino/cache v1.1.2 h1:C9DY/DAPaPxbFC+xNNEI/z1SJY9GS3shmlu5hIQ798g=
 github.com/lightninglabs/neutrino/cache v1.1.2/go.mod h1:XJNcgdOw1LQnanGjw8Vj44CvguYA25IMKjWFZczwZuo=
 github.com/lightningnetwork/lnd/clock v1.0.1 h1:QQod8+m3KgqHdvVMV+2DRNNZS1GRFir8mHZYA+Z2hFo=
@@ -125,12 +127,10 @@ github.com/onsi/gomega v1.4.1/go.mod h1:C1qb7wdrVGGVU+Z6iS04AVkA3Q65CEZX59MT0QO5
 github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
 github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
 github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
-github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
-github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
-github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
+github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
+github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -148,23 +148,23 @@ go.etcd.io/bbolt v1.3.11 h1:yGEzV1wPz2yVCLsD8ZAiGHhHVlczyC9d1rP43/VCRJ0=
 go.etcd.io/bbolt v1.3.11/go.mod h1:dksAq7YMXoljX0xu6VF5DMZGbhYYoLUalEiSySYAS4I=
 go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
 go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
-go.opentelemetry.io/otel v1.36.0 h1:UumtzIklRBY6cI/lllNZlALOF5nNIzJVb16APdvgTXg=
-go.opentelemetry.io/otel v1.36.0/go.mod h1:/TcFMXYjyRNh8khOAO9ybYkqaDBb/70aVwkNML4pP8E=
-go.opentelemetry.io/otel/metric v1.36.0 h1:MoWPKVhQvJ+eeXWHFBOPoBOi20jh6Iq2CcCREuTYufE=
-go.opentelemetry.io/otel/metric v1.36.0/go.mod h1:zC7Ks+yeyJt4xig9DEw9kuUFe5C3zLbVjV2PzT6qzbs=
+go.opentelemetry.io/otel v1.35.0 h1:xKWKPxrxB6OtMCbmMY021CqC45J+3Onta9MqjhnusiQ=
+go.opentelemetry.io/otel v1.35.0/go.mod h1:UEqy8Zp11hpkUrL73gSlELM0DupHoiq72dR+Zqel/+Y=
+go.opentelemetry.io/otel/metric v1.35.0 h1:0znxYu2SNyuMSQT4Y9WDWej0VpcsxkuklLa4/siN90M=
+go.opentelemetry.io/otel/metric v1.35.0/go.mod h1:nKVFgxBZ2fReX6IlyW28MgZojkoAkJGaE8CpgeAU3oE=
 go.opentelemetry.io/otel/sdk v1.35.0 h1:iPctf8iprVySXSKJffSS79eOjl9pvxV9ZqOWT0QejKY=
 go.opentelemetry.io/otel/sdk v1.35.0/go.mod h1:+ga1bZliga3DxJ3CQGg3updiaAJoNECOgJREo9KHGQg=
 go.opentelemetry.io/otel/sdk/metric v1.35.0 h1:1RriWBmCKgkeHEhM7a2uMjMUfP7MsOF5JpUCaEqEI9o=
 go.opentelemetry.io/otel/sdk/metric v1.35.0/go.mod h1:is6XYCUMpcKi+ZsOvfluY5YstFnhW0BidkR+gL+qN+w=
-go.opentelemetry.io/otel/trace v1.36.0 h1:ahxWNuqZjpdiFAyrIoQ4GIiAIhxAunQR6MUoKrsNd4w=
-go.opentelemetry.io/otel/trace v1.36.0/go.mod h1:gQ+OnDZzrybY4k4seLzPAWNwVBBVlF2szhehOBB/tGA=
+go.opentelemetry.io/otel/trace v1.35.0 h1:dPpEfJu1sDIqruz7BHFG3c7528f6ddfSWfFDVt/xgMs=
+go.opentelemetry.io/otel/trace v1.35.0/go.mod h1:WUk7DtFp1Aw2MkvqGdwiXYDZZNvA/1J8o6xRXLrIkyc=
 golang.org/x/crypto v0.0.0-20170930174604-9419663f5a44/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.41.0 h1:WKYxWedPGCTVVl5+WHSSrOBT0O8lx32+zxmHxijgXp4=
 golang.org/x/crypto v0.41.0/go.mod h1:pO5AFd7FA68rFak7rOAGVuygIISepHftHnr8dr6+sUc=
-golang.org/x/exp v0.0.0-20240909161429-701f63a606c0 h1:e66Fs6Z+fZTbFBAxKfP3PALWBtpfqks2bwGcexMxgtk=
-golang.org/x/exp v0.0.0-20240909161429-701f63a606c0/go.mod h1:2TbTHSBQa924w8M6Xs1QcRcFwyucIwBGpK1p2f1YFFY=
+golang.org/x/exp v0.0.0-20250811191247-51f88131bc50 h1:3yiSh9fhy5/RhCSntf4Sy0Tnx50DmMpQ4MQdKKk4yg4=
+golang.org/x/exp v0.0.0-20250811191247-51f88131bc50/go.mod h1:rT6SFzZ7oxADUDx58pcaKFTcZ+inxAa9fTrYx/uVYwg=
 golang.org/x/net v0.0.0-20180719180050-a680a1efc54d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
@@ -196,8 +196,8 @@ golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250603155806-513f23925822 h1:fc6jSaCT0vBduLYZHYrBBNY4dsWuvgyff9noRNDdBeE=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250603155806-513f23925822/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463 h1:e0AIkUUhxyBKh6ssZNrAMeqhA7RKUj42346d1y02i2g=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
 google.golang.org/grpc v1.73.0 h1:VIWSmpI2MegBtTuFt5/JWy2oXxtjJ/e89Z70ImfD2ok=
 google.golang.org/grpc v1.73.0/go.mod h1:50sbHOUqWoCQGI8V2HQLJM0B+LMlIUjNSZmow7EVBQc=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=

wallet/mock.go

@@ -104,3 +104,9 @@ func (m *mockChainClient) TestMempoolAccept(txns []*wire.MsgTx,
 func (m *mockChainClient) MapRPCErr(err error) error {
 	return nil
 }
+
+func (m *mockChainClient) SubmitPackage(_ []*wire.MsgTx, _ *wire.MsgTx,
+	_ *float64) (*btcjson.SubmitPackageResult, error) {
+
+	return &btcjson.SubmitPackageResult{}, nil
+}