admin: Add account endpoint.

dex/marshal.go

@@ -24,6 +24,21 @@ func (b Bytes) MarshalJSON() ([]byte, error) {
 	return json.Marshal(hex.EncodeToString(b))
 }
 
+// Scan implements the sql.Scanner interface.
+func (b *Bytes) Scan(src interface{}) error {
+	switch src := src.(type) {
+	case []byte:
+		// src may be reused, so create a new slice.
+		dst := make(Bytes, len(src))
+		copy(dst, src)
+		*b = dst
+		return nil
+	case nil:
+		return nil
+	}
+	return fmt.Errorf("cannot convert %T to Bytes", src)
+}
+
 // UnmarshalJSON satisfies the json.Unmarshaler interface, and expects a UTF-8
 // encoding of a hex string.
 func (b *Bytes) UnmarshalJSON(encHex []byte) (err error) {

server/admin/api.go

@@ -4,6 +4,7 @@
 package admin
 
 import (
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"net/http"
@@ -12,6 +13,7 @@ import (
 	"time"
 
 	"decred.org/dcrdex/dex/encode"
+	"decred.org/dcrdex/server/account"
 	"github.com/go-chi/chi"
 )
 
@@ -156,3 +158,25 @@ func (s *Server) apiAccounts(w http.ResponseWriter, _ *http.Request) {
 	}
 	writeJSON(w, accts)
 }
+
+// apiAccountInfo is the handler for the '/account/{account id}' API request.
+func (s *Server) apiAccountInfo(w http.ResponseWriter, r *http.Request) {
+	acctIDStr := chi.URLParam(r, accountNameKey)
+	acctIDSlice, err := hex.DecodeString(acctIDStr)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("could not decode accout id: %v", err), http.StatusBadRequest)
+		return
+	}
+	if len(acctIDSlice) != account.HashSize {
+		http.Error(w, "account id has incorrect length", http.StatusBadRequest)
+		return
+	}
+	var acctID account.AccountID
+	copy(acctID[:], acctIDSlice)
+	acctInfo, err := s.core.AccountInfo(acctID)
+	if err != nil {
+		http.Error(w, fmt.Sprintf("failed to retrieve account: %v", err), http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, acctInfo)
+}

server/admin/server.go

@@ -17,6 +17,7 @@ import (
 	"sync"
 	"time"
 
+	"decred.org/dcrdex/server/account"
 	"decred.org/dcrdex/server/db"
 	"decred.org/dcrdex/server/market"
 	"github.com/decred/slog"
@@ -30,7 +31,8 @@ const (
 	// is closed.
 	rpcTimeoutSeconds = 10
 
-	marketNameKey = "market"
+	marketNameKey  = "market"
+	accountNameKey = "account"
 )
 
 var (
@@ -40,6 +42,7 @@ var (
 // SvrCore is satisfied by server/dex.DEX.
 type SvrCore interface {
 	Accounts() ([]*db.Account, error)
+	AccountInfo(account.AccountID) (*db.Account, error)
 	ConfigMsg() json.RawMessage
 	MarketRunning(mktName string) (found, running bool)
 	MarketStatus(mktName string) *market.Status
@@ -121,6 +124,9 @@ func NewServer(cfg *SrvConfig) (*Server, error) {
 		r.Get("/ping", s.apiPing)
 		r.Get("/config", s.apiConfig)
 		r.Get("/accounts", s.apiAccounts)
+		r.Route("/account/{"+accountNameKey+"}", func(rm chi.Router) {
+			rm.Get("/", s.apiAccountInfo)
+		})
 
 		r.Get("/markets", s.apiMarkets)
 		r.Route("/market/{"+marketNameKey+"}", func(rm chi.Router) {

server/admin/server_test.go

@@ -49,6 +49,8 @@ type TCore struct {
 	markets     map[string]*TMarket
 	accounts    []*db.Account
 	accountsErr error
+	account     *db.Account
+	accountErr  error
 }
 
 func (c *TCore) ConfigMsg() json.RawMessage { return nil }
@@ -138,6 +140,9 @@ func (w *tResponseWriter) WriteHeader(statusCode int) {
 }
 
 func (c *TCore) Accounts() ([]*db.Account, error) { return c.accounts, c.accountsErr }
+func (c *TCore) AccountInfo(_ account.AccountID) (*db.Account, error) {
+	return c.account, c.accountErr
+}
 
 // genCertPair generates a key/cert pair to the paths provided.
 func genCertPair(certFile, keyFile string) error {
@@ -794,3 +799,127 @@ func TestAccounts(t *testing.T) {
 		t.Fatalf("apiAccounts returned code %d, expected %d", w.Code, http.StatusInternalServerError)
 	}
 }
+
+func TestAccountInfo(t *testing.T) {
+	core := new(TCore)
+	srv := &Server{
+		core: core,
+	}
+
+	acctIDStr := "0a9912205b2cbab0c25c2de30bda9074de0ae23b065489a99199bad763f102cc"
+
+	mux := chi.NewRouter()
+	mux.Route("/account/{"+accountNameKey+"}", func(rm chi.Router) {
+		rm.Get("/", srv.apiAccountInfo)
+	})
+
+	// No account.
+	w := httptest.NewRecorder()
+	r, _ := http.NewRequest("GET", "https://localhost/account/"+acctIDStr, nil)
+	r.RemoteAddr = "localhost"
+
+	mux.ServeHTTP(w, r)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("apiAccounts returned code %d, expected %d", w.Code, http.StatusOK)
+	}
+	respBody := w.Body.String()
+	if respBody != "null\n" {
+		t.Errorf("incorrect response body: %q", respBody)
+	}
+
+	accountIDSlice, err := hex.DecodeString(acctIDStr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var accountID account.AccountID
+	copy(accountID[:], accountIDSlice)
+	pubkey, err := hex.DecodeString("0204988a498d5d19514b217e872b4dbd1cf071d365c4879e64ed5919881c97eb19")
+	if err != nil {
+		t.Fatal(err)
+	}
+	feeCoin, err := hex.DecodeString("6e515ff861f2016fd0da2f3eccdf8290c03a9d116bfba2f6729e648bdc6e5aed00000005")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// An account.
+	core.account = &db.Account{
+		AccountID:  accountID,
+		Pubkey:     dex.Bytes(pubkey),
+		FeeAddress: "DsdQFmH3azyoGKJHt2ArJNxi35LCEgMqi8k",
+		FeeCoin:    dex.Bytes(feeCoin),
+		BrokenRule: account.Rule(byte(255)),
+	}
+
+	w = httptest.NewRecorder()
+	r, _ = http.NewRequest("GET", "https://localhost/account/"+acctIDStr, nil)
+	r.RemoteAddr = "localhost"
+
+	mux.ServeHTTP(w, r)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("apiAccounts returned code %d, expected %d", w.Code, http.StatusOK)
+	}
+
+	exp := `{
+    "accountid": "0a9912205b2cbab0c25c2de30bda9074de0ae23b065489a99199bad763f102cc",
+    "pubkey": "0204988a498d5d19514b217e872b4dbd1cf071d365c4879e64ed5919881c97eb19",
+    "feeaddress": "DsdQFmH3azyoGKJHt2ArJNxi35LCEgMqi8k",
+    "feecoin": "6e515ff861f2016fd0da2f3eccdf8290c03a9d116bfba2f6729e648bdc6e5aed00000005",
+    "brokenrule": 255
+}
+`
+	if exp != w.Body.String() {
+		t.Errorf("unexpected response %q, wanted %q", w.Body.String(), exp)
+	}
+
+	// ok, upper case account id
+	w = httptest.NewRecorder()
+	r, _ = http.NewRequest("GET", "https://localhost/account/"+strings.ToUpper(acctIDStr), nil)
+	r.RemoteAddr = "localhost"
+
+	mux.ServeHTTP(w, r)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("apiAccounts returned code %d, expected %d", w.Code, http.StatusOK)
+	}
+	if exp != w.Body.String() {
+		t.Errorf("unexpected response %q, wanted %q", w.Body.String(), exp)
+	}
+
+	// acct id is not hex
+	w = httptest.NewRecorder()
+	r, _ = http.NewRequest("GET", "https://localhost/account/nothex", nil)
+	r.RemoteAddr = "localhost"
+
+	mux.ServeHTTP(w, r)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("apiAccounts returned code %d, expected %d", w.Code, http.StatusBadRequest)
+	}
+
+	// acct id wrong length
+	w = httptest.NewRecorder()
+	r, _ = http.NewRequest("GET", "https://localhost/account/"+acctIDStr[2:], nil)
+	r.RemoteAddr = "localhost"
+
+	mux.ServeHTTP(w, r)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("apiAccounts returned code %d, expected %d", w.Code, http.StatusBadRequest)
+	}
+
+	// core.Account error
+	core.accountErr = errors.New("error")
+
+	w = httptest.NewRecorder()
+	r, _ = http.NewRequest("GET", "https://localhost/account/"+acctIDStr, nil)
+	r.RemoteAddr = "localhost"
+
+	mux.ServeHTTP(w, r)
+
+	if w.Code != http.StatusInternalServerError {
+		t.Fatalf("apiAccounts returned code %d, expected %d", w.Code, http.StatusInternalServerError)
+	}
+}

server/db/driver/pg/accounts.go

@@ -53,12 +53,14 @@ func (a *Archiver) Accounts() ([]*db.Account, error) {
 	}
 	defer rows.Close()
 	var accts []*db.Account
+	var feeAddress sql.NullString
 	for rows.Next() {
 		a := new(db.Account)
-		err = rows.Scan(&a.AccountID, &a.Pubkey, &a.FeeAddress, &a.FeeCoin, &a.BrokenRule)
+		err = rows.Scan(&a.AccountID, &a.Pubkey, &feeAddress, &a.FeeCoin, &a.BrokenRule)
 		if err != nil {
 			return nil, err
 		}
+		a.FeeAddress = feeAddress.String
 		accts = append(accts, a)
 	}
 	if err = rows.Err(); err != nil {
@@ -67,6 +69,19 @@ func (a *Archiver) Accounts() ([]*db.Account, error) {
 	return accts, nil
 }
 
+// AccountInfo returns data for an account.
+func (a *Archiver) AccountInfo(aid account.AccountID) (*db.Account, error) {
+	stmt := fmt.Sprintf(internal.SelectAccountInfo, a.tables.accounts)
+	acct := new(db.Account)
+	var feeAddress sql.NullString
+	if err := a.db.QueryRow(stmt, aid).Scan(&acct.AccountID, &acct.Pubkey, &feeAddress,
+		&acct.FeeCoin, &acct.BrokenRule); err != nil {
+		return nil, err
+	}
+	acct.FeeAddress = feeAddress.String
+	return acct, nil
+}
+
 // CreateAccount creates an entry for a new account in the accounts table. A
 // DCR registration fee address is created and returned.
 func (a *Archiver) CreateAccount(acct *account.Account) (string, error) {

server/db/driver/pg/accounts_online_test.go

@@ -4,6 +4,8 @@ package pg
 
 import (
 	"encoding/hex"
+	"fmt"
+	"reflect"
 	"testing"
 
 	"decred.org/dcrdex/server/account"
@@ -89,6 +91,49 @@ func TestAccounts(t *testing.T) {
 		t.Fatal("accounts has unexpected data")
 	}
 
+	anAcct, err := archie.AccountInfo(accts[0].AccountID)
+	if err != nil {
+		t.Fatalf("error getting account info: %v", err)
+	}
+	if !reflect.DeepEqual(accts[0], anAcct) {
+		t.Fatal("error getting account info: actual does not equal expected")
+	}
+
+	// The Account ID cannot be null. broken_rule has a default value of 0
+	// and is unexpected to become null.
+	nullAccounts := `UPDATE %s
+		SET
+		pubkey = null ,
+		fee_address = null,
+		fee_coin = null;`
+
+	stmt := fmt.Sprintf(nullAccounts, archie.tables.accounts)
+	if _, err = sqlExec(archie.db, stmt); err != nil {
+		t.Fatalf("error nullifying account: %v", err)
+	}
+
+	accts, err = archie.Accounts()
+	if err != nil {
+		t.Fatalf("error getting null accounts: %v", err)
+	}
+
+	// All fields except account ID are null.
+	if accts[0].AccountID.String() != "0a9912205b2cbab0c25c2de30bda9074de0ae23b065489a99199bad763f102cc" ||
+		accts[0].Pubkey.String() != "" ||
+		accts[0].FeeAddress != "" ||
+		accts[0].FeeCoin.String() != "" ||
+		byte(accts[0].BrokenRule) != byte(0) {
+		t.Fatal("accounts has unexpected data")
+	}
+
+	anAcct, err = archie.AccountInfo(accts[0].AccountID)
+	if err != nil {
+		t.Fatalf("error getting null account info: %v", err)
+	}
+	if !reflect.DeepEqual(accts[0], anAcct) {
+		t.Fatal("error getting null account info: actual does not equal expected")
+	}
+
 	// Close the account for failure to complete a swap.
 	archie.CloseAccount(tAcctID, account.FailureToAct)
 	_, _, open = archie.Account(tAcctID)

server/db/driver/pg/internal/accounts.go

@@ -43,6 +43,10 @@ const (
 	// SelectAllAccounts retrieves all accounts.
 	SelectAllAccounts = `SELECT * FROM %s;`
 
+	// SelectAccountInfo retrieves all fields for an account.
+	SelectAccountInfo = `SELECT * FROM %s
+		WHERE account_id = $1;`
+
 	// CreateAccount creates an entry for a new account.
 	CreateAccount = `INSERT INTO %s (account_id, pubkey, fee_address)
 		VALUES ($1, $2, $3);`

server/db/interface.go

@@ -182,6 +182,9 @@ type AccountArchiver interface {
 
 	// Accounts returns data for all accounts.
 	Accounts() ([]*Account, error)
+
+	// AccountInfo returns data for an account.
+	AccountInfo(account.AccountID) (*Account, error)
 }
 
 // MatchData represents an order pair match, but with just the order IDs instead

server/dex/dex.go

@@ -12,6 +12,7 @@ import (
 	"decred.org/dcrdex/dex"
 	"decred.org/dcrdex/dex/encode"
 	"decred.org/dcrdex/dex/msgjson"
+	"decred.org/dcrdex/server/account"
 	"decred.org/dcrdex/server/asset"
 	dcrasset "decred.org/dcrdex/server/asset/dcr"
 	"decred.org/dcrdex/server/auth"
@@ -552,3 +553,8 @@ func (dm *DEX) SuspendMarket(name string, tSusp time.Time, persistBooks bool) *m
 func (dm *DEX) Accounts() ([]*db.Account, error) {
 	return dm.storage.Accounts()
 }
+
+// AccountInfo returns data for an account.
+func (dm *DEX) AccountInfo(aid account.AccountID) (*db.Account, error) {
+	return dm.storage.AccountInfo(aid)
+}

server/market/market_test.go

@@ -169,11 +169,12 @@ func (ta *TArchivist) CloseAccount(account.AccountID, account.Rule) {}
 func (ta *TArchivist) Account(account.AccountID) (acct *account.Account, paid, open bool) {
 	return nil, false, false
 }
-func (ta *TArchivist) CreateAccount(*account.Account) (string, error)   { return "", nil }
-func (ta *TArchivist) AccountRegAddr(account.AccountID) (string, error) { return "", nil }
-func (ta *TArchivist) PayAccount(account.AccountID, []byte) error       { return nil }
-func (ta *TArchivist) Accounts() ([]*db.Account, error)                 { return nil, nil }
-func (ta *TArchivist) Close() error                                     { return nil }
+func (ta *TArchivist) CreateAccount(*account.Account) (string, error)     { return "", nil }
+func (ta *TArchivist) AccountRegAddr(account.AccountID) (string, error)   { return "", nil }
+func (ta *TArchivist) PayAccount(account.AccountID, []byte) error         { return nil }
+func (ta *TArchivist) Accounts() ([]*db.Account, error)                   { return nil, nil }
+func (ta *TArchivist) AccountInfo(account.AccountID) (*db.Account, error) { return nil, nil }
+func (ta *TArchivist) Close() error                                       { return nil }
 
 func randomOrderID() order.OrderID {
 	pk := randomBytes(order.OrderIDSize)