feat(wallet) add filter api to retrieve recipients of a wallet

The new API returns all known recipients of a wallet, by
sourcing transfers, pending_transactions and multi_transactions tables
The API is synchronous. Future work will be to make it async.
In some corner cases, when watching a famous wallet, it can
be that there are too many recipients to be returned in one go. Offset
and limit can be used to paginate through the results.

Updates status-desktop #10025

services/wallet/activity/filter.go

@@ -1,7 +1,10 @@
 package activity
 
 import (
-	eth_common "github.com/ethereum/go-ethereum/common"
+	"context"
+	"database/sql"
+
+	eth "github.com/ethereum/go-ethereum/common"
 	"github.com/status-im/status-go/services/wallet/common"
 )
 
@@ -54,20 +57,20 @@ type TokenCode string
 // see allTokensFilter and noTokensFilter
 type Tokens struct {
 	Assets       []TokenCode   `json:"assets"`
-	Collectibles []eth_common.Address `json:"collectibles"`
+	Collectibles []eth.Address `json:"collectibles"`
 	EnabledTypes []TokenType   `json:"enabledTypes"`
 }
 
 func noAssetsFilter() Tokens {
-	return Tokens{[]TokenCode{}, []eth_common.Address{}, []TokenType{CollectiblesTT}}
+	return Tokens{[]TokenCode{}, []eth.Address{}, []TokenType{CollectiblesTT}}
 }
 
 func allTokensFilter() Tokens {
 	return Tokens{}
 }
 
-func allAddressesFilter() []eth_common.Address {
+func allAddressesFilter() []eth.Address {
-	return []eth_common.Address{}
+	return []eth.Address{}
 }
 
 func allNetworksFilter() []common.ChainID {
@@ -79,5 +82,55 @@ type Filter struct {
 	Types                 []Type        `json:"types"`
 	Statuses              []Status      `json:"statuses"`
 	Tokens                Tokens        `json:"tokens"`
-	CounterpartyAddresses []eth_common.Address `json:"counterpartyAddresses"`
+	CounterpartyAddresses []eth.Address `json:"counterpartyAddresses"`
+}
+
+// TODO: consider sorting by saved address and contacts to offload the client from doing it at runtime
+func GetRecipients(ctx context.Context, db *sql.DB, offset int, limit int) (addresses []eth.Address, hasMore bool, err error) {
+	rows, err := db.QueryContext(ctx, `
+		SELECT
+			transfers.address as to_address,
+			transfers.timestamp AS timestamp
+		FROM transfers
+		WHERE transfers.multi_transaction_id = 0
+
+		UNION ALL
+
+		SELECT
+			pending_transactions.to_address AS to_address,
+			pending_transactions.timestamp AS timestamp
+		FROM pending_transactions
+		WHERE pending_transactions.multi_transaction_id = 0
+
+		UNION ALL
+
+		SELECT
+			multi_transactions.to_address AS to_address,
+			multi_transactions.timestamp AS timestamp
+		FROM multi_transactions
+		ORDER BY timestamp DESC
+		LIMIT ? OFFSET ?`, limit, offset)
+	if err != nil {
+		return nil, false, err
+	}
+	defer rows.Close()
+
+	var entries []eth.Address
+	for rows.Next() {
+		var toAddress eth.Address
+		var timestamp int64
+		err := rows.Scan(&toAddress, &timestamp)
+		if err != nil {
+			return nil, false, err
+		}
+		entries = append(entries, toAddress)
+	}
+
+	if err = rows.Err(); err != nil {
+		return nil, false, err
+	}
+
+	hasMore = len(entries) == limit
+
+	return entries, hasMore, nil
 }

services/wallet/activity/filter_test.go

@@ -0,0 +1,63 @@
+package activity
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"testing"
+
+	"github.com/status-im/status-go/appdatabase"
+	"github.com/status-im/status-go/services/wallet/transfer"
+
+	"github.com/stretchr/testify/require"
+)
+
+func setupTestFilterDB(t *testing.T) (db *sql.DB, close func()) {
+	db, err := appdatabase.SetupTestMemorySQLDB("wallet-activity-tests-filter")
+	require.NoError(t, err)
+
+	return db, func() {
+		require.NoError(t, db.Close())
+	}
+}
+
+func TestGetRecipientsEmptyDB(t *testing.T) {
+	db, close := setupTestFilterDB(t)
+	defer close()
+
+	entries, hasMore, err := GetRecipients(context.Background(), db, 0, 15)
+	require.NoError(t, err)
+	require.Equal(t, 0, len(entries))
+	require.False(t, hasMore)
+}
+
+func TestGetRecipients(t *testing.T) {
+	db, close := setupTestFilterDB(t)
+	defer close()
+
+	// Add 6 extractable transactions
+	trs, _, toTrs := transfer.GenerateTestTransactions(t, db, 0, 6)
+	for i := range trs {
+		transfer.InsertTestTransfer(t, db, &trs[i])
+	}
+
+	entries, hasMore, err := GetRecipients(context.Background(), db, 0, 15)
+	require.NoError(t, err)
+	require.False(t, hasMore)
+	require.Equal(t, 6, len(entries))
+	for i := range entries {
+		found := false
+		for j := range toTrs {
+			if entries[i] == toTrs[j] {
+				found = true
+				break
+			}
+		}
+		require.True(t, found, fmt.Sprintf("recipient %s not found in toTrs", entries[i].Hex()))
+	}
+
+	entries, hasMore, err = GetRecipients(context.Background(), db, 0, 4)
+	require.NoError(t, err)
+	require.Equal(t, 4, len(entries))
+	require.True(t, hasMore)
+}

services/wallet/api.go

@@ -532,3 +532,14 @@ func (api *API) FilterActivityAsync(ctx context.Context, addresses []common.Addr
 	log.Debug("[WalletAPI:: FilterActivityAsync] addr.count", len(addresses), "chainIDs.count", len(chainIDs), "filter", filter, "offset", offset, "limit", limit)
 	return api.s.activity.FilterActivityAsync(ctx, addresses, chainIDs, filter, offset, limit)
 }
+
+type GetAllRecipientsResponse struct {
+	Addresses []common.Address `json:"addresses"`
+	HasMore   bool             `json:"hasMore"`
+}
+
+func (api *API) GetAllRecipients(ctx context.Context, offset int, limit int) (result *GetAllRecipientsResponse, err error) {
+	result = &GetAllRecipientsResponse{}
+	result.Addresses, result.HasMore, err = activity.GetRecipients(ctx, api.s.db, offset, limit)
+	return result, err
+}