From db2bcb576faf32b38b03bbbb75c257d07fb791f8 Mon Sep 17 00:00:00 2001
From: Andrew Lalis <andrewlalisofficial@gmail.com>
Date: Sun, 27 Feb 2022 11:30:33 +0100
Subject: [PATCH] Improved account transfer UI, added config-based api switch.

---
 .../ctl/api/ExchangeApiController.java        | 12 +++-
 .../ctl/{ => exchange}/AccountPage.java       |  6 +-
 .../ctl/{ => exchange}/TradePage.java         |  6 +-
 .../ctl/{ => exchange}/dto/BalanceData.java   |  2 +-
 .../ctl/exchange/dto/ExchangeAccountData.java |  2 -
 .../{ => exchange}/dto/FullAccountData.java   |  4 +-
 .../ctl/exchange/dto/PublicAccountData.java   | 10 ++++
 .../{ => exchange}/dto/SimpleAccountData.java |  2 +-
 .../ctl/{ => exchange}/dto/TradeData.java     |  4 +-
 .../ctl/{ => exchange}/dto/TradePayload.java  |  2 +-
 .../{ => exchange}/dto/TransactionData.java   |  3 +-
 .../ctl/{ => exchange}/dto/TransferData.java  |  3 +-
 .../ctl/exchange/dto/TransferPageData.java    |  9 +++
 .../{ => exchange}/dto/TransferPayload.java   |  2 +-
 .../coyotecredit/dao/AccountRepository.java   |  1 +
 .../coyotecredit/service/AccountService.java  |  7 ++-
 .../coyotecredit/service/ExchangeService.java | 17 +++++-
 .../coyotecredit/service/TradeService.java    |  2 +-
 .../service/TradeableUpdateService.java       |  8 ++-
 .../application-development.properties        |  1 +
 src/main/resources/static/js/transfer.js      | 56 +++++++++++++++++++
 .../templates/{ => account}/trade.html        |  0
 .../resources/templates/account/transfer.html |  9 +--
 23 files changed, 138 insertions(+), 30 deletions(-)
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/AccountPage.java (91%)
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/TradePage.java (89%)
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/dto/BalanceData.java (63%)
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/dto/FullAccountData.java (83%)
 create mode 100644 src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/PublicAccountData.java
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/dto/SimpleAccountData.java (73%)
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/dto/TradeData.java (73%)
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/dto/TradePayload.java (93%)
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/dto/TransactionData.java (84%)
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/dto/TransferData.java (84%)
 create mode 100644 src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferPageData.java
 rename src/main/java/nl/andrewl/coyotecredit/ctl/{ => exchange}/dto/TransferPayload.java (70%)
 rename src/main/resources/templates/{ => account}/trade.html (100%)

diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/api/ExchangeApiController.java b/src/main/java/nl/andrewl/coyotecredit/ctl/api/ExchangeApiController.java
index 7356432..358d533 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/api/ExchangeApiController.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/api/ExchangeApiController.java
@@ -1,7 +1,10 @@
 package nl.andrewl.coyotecredit.ctl.api;
 
 import lombok.RequiredArgsConstructor;
+import nl.andrewl.coyotecredit.ctl.exchange.dto.PublicAccountData;
+import nl.andrewl.coyotecredit.model.User;
 import nl.andrewl.coyotecredit.service.ExchangeService;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -16,7 +19,12 @@ public class ExchangeApiController {
 	private final ExchangeService exchangeService;
 
 	@GetMapping(path = "/tradeables")
-	public Map<Long, String> getCurrentTradeables(@PathVariable long exchangeId) {
-		return exchangeService.getCurrentTradeables(exchangeId);
+	public Map<Long, String> getCurrentTradeables(@PathVariable long exchangeId, @AuthenticationPrincipal User user) {
+		return exchangeService.getCurrentTradeables(exchangeId, user);
+	}
+
+	@GetMapping(path = "/accounts/{number}")
+	public PublicAccountData getAccountData(@PathVariable long exchangeId, @PathVariable String number, @AuthenticationPrincipal User user) {
+		return exchangeService.getPublicAccountData(exchangeId, number, user);
 	}
 }
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/AccountPage.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/AccountPage.java
similarity index 91%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/AccountPage.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/AccountPage.java
index 9696ea5..506f472 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/AccountPage.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/AccountPage.java
@@ -1,7 +1,7 @@
-package nl.andrewl.coyotecredit.ctl;
+package nl.andrewl.coyotecredit.ctl.exchange;
 
 import lombok.RequiredArgsConstructor;
-import nl.andrewl.coyotecredit.ctl.dto.TransferPayload;
+import nl.andrewl.coyotecredit.ctl.exchange.dto.TransferPayload;
 import nl.andrewl.coyotecredit.model.User;
 import nl.andrewl.coyotecredit.service.AccountService;
 import org.springframework.http.HttpStatus;
@@ -45,7 +45,7 @@ public class AccountPage {
 
 	@GetMapping(path = "/transfer")
 	public String getTransferPage(Model model, @PathVariable long accountId, @AuthenticationPrincipal User user) {
-		model.addAttribute("balances", accountService.getTransferData(accountId, user));
+		model.addAttribute("data", accountService.getTransferData(accountId, user));
 		return "account/transfer";
 	}
 
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/TradePage.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/TradePage.java
similarity index 89%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/TradePage.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/TradePage.java
index e29372a..ae37323 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/TradePage.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/TradePage.java
@@ -1,7 +1,7 @@
-package nl.andrewl.coyotecredit.ctl;
+package nl.andrewl.coyotecredit.ctl.exchange;
 
 import lombok.RequiredArgsConstructor;
-import nl.andrewl.coyotecredit.ctl.dto.TradePayload;
+import nl.andrewl.coyotecredit.ctl.exchange.dto.TradePayload;
 import nl.andrewl.coyotecredit.model.User;
 import nl.andrewl.coyotecredit.service.ExchangeService;
 import nl.andrewl.coyotecredit.service.TradeService;
@@ -26,7 +26,7 @@ public class TradePage {
 			@AuthenticationPrincipal User user
 	) {
 		model.addAttribute("data", tradeService.getTradeData(accountId, user));
-		return "trade";
+		return "account/trade";
 	}
 
 	@PostMapping
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/BalanceData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/BalanceData.java
similarity index 63%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/dto/BalanceData.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/BalanceData.java
index c3ec7b0..773efda 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/BalanceData.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/BalanceData.java
@@ -1,4 +1,4 @@
-package nl.andrewl.coyotecredit.ctl.dto;
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
 
 public record BalanceData(
 	long id,
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/ExchangeAccountData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/ExchangeAccountData.java
index b33f7a6..f67c066 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/ExchangeAccountData.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/ExchangeAccountData.java
@@ -1,7 +1,5 @@
 package nl.andrewl.coyotecredit.ctl.exchange.dto;
 
-import nl.andrewl.coyotecredit.ctl.dto.SimpleAccountData;
-
 public record ExchangeAccountData(
 		ExchangeData exchange,
 		SimpleAccountData account
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/FullAccountData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/FullAccountData.java
similarity index 83%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/dto/FullAccountData.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/FullAccountData.java
index 37ce7cb..9eeb86e 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/FullAccountData.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/FullAccountData.java
@@ -1,6 +1,4 @@
-package nl.andrewl.coyotecredit.ctl.dto;
-
-import nl.andrewl.coyotecredit.ctl.exchange.dto.ExchangeData;
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
 
 import java.util.List;
 
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/PublicAccountData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/PublicAccountData.java
new file mode 100644
index 0000000..f923e4d
--- /dev/null
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/PublicAccountData.java
@@ -0,0 +1,10 @@
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
+
+/**
+ * Account data that can be publicly seen by any member of an exchange.
+ */
+public record PublicAccountData(
+		long id,
+		String number,
+		String name
+) {}
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/SimpleAccountData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/SimpleAccountData.java
similarity index 73%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/dto/SimpleAccountData.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/SimpleAccountData.java
index 3a54c8a..ee5c692 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/SimpleAccountData.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/SimpleAccountData.java
@@ -1,4 +1,4 @@
-package nl.andrewl.coyotecredit.ctl.dto;
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
 
 public record SimpleAccountData (
 		long id,
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TradeData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TradeData.java
similarity index 73%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/dto/TradeData.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TradeData.java
index 434fc9e..2d33158 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TradeData.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TradeData.java
@@ -1,4 +1,6 @@
-package nl.andrewl.coyotecredit.ctl.dto;
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
+
+import nl.andrewl.coyotecredit.ctl.dto.TradeableData;
 
 import java.math.BigDecimal;
 import java.util.List;
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TradePayload.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TradePayload.java
similarity index 93%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/dto/TradePayload.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TradePayload.java
index 0e1d0f8..c8c1f83 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TradePayload.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TradePayload.java
@@ -1,4 +1,4 @@
-package nl.andrewl.coyotecredit.ctl.dto;
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
 
 /**
  * The payload that's sent when a user performs a trade with the market. This
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransactionData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransactionData.java
similarity index 84%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransactionData.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransactionData.java
index d8bca50..cba86a9 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransactionData.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransactionData.java
@@ -1,5 +1,6 @@
-package nl.andrewl.coyotecredit.ctl.dto;
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
 
+import nl.andrewl.coyotecredit.ctl.dto.TradeableData;
 import nl.andrewl.coyotecredit.model.Transaction;
 
 import java.time.format.DateTimeFormatter;
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransferData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferData.java
similarity index 84%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransferData.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferData.java
index 7b4b9b3..ccbf4ac 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransferData.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferData.java
@@ -1,5 +1,6 @@
-package nl.andrewl.coyotecredit.ctl.dto;
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
 
+import nl.andrewl.coyotecredit.ctl.dto.TradeableData;
 import nl.andrewl.coyotecredit.model.Transfer;
 
 import java.time.format.DateTimeFormatter;
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferPageData.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferPageData.java
new file mode 100644
index 0000000..8e4bf8b
--- /dev/null
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferPageData.java
@@ -0,0 +1,9 @@
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
+
+import java.util.List;
+
+public record TransferPageData(
+		long exchangeId,
+		List<BalanceData> balances
+) {
+}
diff --git a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransferPayload.java b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferPayload.java
similarity index 70%
rename from src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransferPayload.java
rename to src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferPayload.java
index ac7a16e..36b7582 100644
--- a/src/main/java/nl/andrewl/coyotecredit/ctl/dto/TransferPayload.java
+++ b/src/main/java/nl/andrewl/coyotecredit/ctl/exchange/dto/TransferPayload.java
@@ -1,4 +1,4 @@
-package nl.andrewl.coyotecredit.ctl.dto;
+package nl.andrewl.coyotecredit.ctl.exchange.dto;
 
 public record TransferPayload (
 		String recipientNumber,
diff --git a/src/main/java/nl/andrewl/coyotecredit/dao/AccountRepository.java b/src/main/java/nl/andrewl/coyotecredit/dao/AccountRepository.java
index 9ffee97..4eab4e8 100644
--- a/src/main/java/nl/andrewl/coyotecredit/dao/AccountRepository.java
+++ b/src/main/java/nl/andrewl/coyotecredit/dao/AccountRepository.java
@@ -14,6 +14,7 @@ public interface AccountRepository extends JpaRepository<Account, Long> {
 	List<Account> findAllByUser(User user);
 	Optional<Account> findByNumber(String number);
 	Optional<Account> findByUserAndExchange(User user, Exchange exchange);
+	Optional<Account> findByNumberAndExchange(String number, Exchange exchange);
 	boolean existsByUserAndExchange(User user, Exchange exchange);
 
 	List<Account> findAllByExchange(Exchange e);
diff --git a/src/main/java/nl/andrewl/coyotecredit/service/AccountService.java b/src/main/java/nl/andrewl/coyotecredit/service/AccountService.java
index b39fec6..aa5b972 100644
--- a/src/main/java/nl/andrewl/coyotecredit/service/AccountService.java
+++ b/src/main/java/nl/andrewl/coyotecredit/service/AccountService.java
@@ -2,7 +2,7 @@ package nl.andrewl.coyotecredit.service;
 
 import lombok.RequiredArgsConstructor;
 import nl.andrewl.coyotecredit.ctl.dto.*;
-import nl.andrewl.coyotecredit.ctl.exchange.dto.ExchangeData;
+import nl.andrewl.coyotecredit.ctl.exchange.dto.*;
 import nl.andrewl.coyotecredit.dao.*;
 import nl.andrewl.coyotecredit.model.*;
 import nl.andrewl.coyotecredit.util.AccountNumberUtils;
@@ -34,13 +34,13 @@ public class AccountService {
 	private final UserNotificationRepository notificationRepository;
 
 	@Transactional(readOnly = true)
-	public List<BalanceData> getTransferData(long accountId, User user) {
+	public TransferPageData getTransferData(long accountId, User user) {
 		Account account = accountRepository.findById(accountId)
 				.orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
 		if (!account.getUser().getId().equals(user.getId())) {
 			throw new ResponseStatusException(HttpStatus.NOT_FOUND);
 		}
-		return account.getBalances().stream()
+		List<BalanceData> balances = account.getBalances().stream()
 				.filter(b -> b.getAmount().compareTo(BigDecimal.ZERO) > 0)
 				.map(b -> new BalanceData(
 						b.getTradeable().getId(),
@@ -50,6 +50,7 @@ public class AccountService {
 				))
 				.sorted(Comparator.comparing(BalanceData::symbol))
 				.toList();
+		return new TransferPageData(account.getExchange().getId(), balances);
 	}
 
 	@Transactional
diff --git a/src/main/java/nl/andrewl/coyotecredit/service/ExchangeService.java b/src/main/java/nl/andrewl/coyotecredit/service/ExchangeService.java
index 78ede28..9c9103a 100644
--- a/src/main/java/nl/andrewl/coyotecredit/service/ExchangeService.java
+++ b/src/main/java/nl/andrewl/coyotecredit/service/ExchangeService.java
@@ -103,6 +103,18 @@ public class ExchangeService {
 				.toList();
 	}
 
+	@Transactional(readOnly = true)
+	public PublicAccountData getPublicAccountData(long exchangeId, String number, User user) {
+		Exchange exchange = exchangeRepository.findById(exchangeId)
+				.orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
+		if (!accountRepository.existsByUserAndExchange(user, exchange)) {
+			throw new ResponseStatusException(HttpStatus.NOT_FOUND);
+		}
+		Account account = accountRepository.findByNumberAndExchange(number, exchange)
+				.orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
+		return new PublicAccountData(account.getId(), account.getNumber(), account.getName());
+	}
+
 	@Transactional(readOnly = true)
 	public void ensureAdminAccount(long exchangeId, User user) {
 		getExchangeIfAdmin(exchangeId, user);
@@ -168,9 +180,12 @@ public class ExchangeService {
 	}
 
 	@Transactional(readOnly = true)
-	public Map<Long, String> getCurrentTradeables(long exchangeId) {
+	public Map<Long, String> getCurrentTradeables(long exchangeId, User user) {
 		Exchange e = exchangeRepository.findById(exchangeId)
 				.orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
+		if (!accountRepository.existsByUserAndExchange(user, e)) {
+			throw new ResponseStatusException(HttpStatus.NOT_FOUND);
+		}
 		Map<Long, String> tradeables = new HashMap<>();
 		for (var t : e.getAllTradeables()) {
 			tradeables.put(t.getId(), t.getMarketPriceUsd().toPlainString());
diff --git a/src/main/java/nl/andrewl/coyotecredit/service/TradeService.java b/src/main/java/nl/andrewl/coyotecredit/service/TradeService.java
index 37cff7f..083d187 100644
--- a/src/main/java/nl/andrewl/coyotecredit/service/TradeService.java
+++ b/src/main/java/nl/andrewl/coyotecredit/service/TradeService.java
@@ -1,7 +1,7 @@
 package nl.andrewl.coyotecredit.service;
 
 import lombok.RequiredArgsConstructor;
-import nl.andrewl.coyotecredit.ctl.dto.TradeData;
+import nl.andrewl.coyotecredit.ctl.exchange.dto.TradeData;
 import nl.andrewl.coyotecredit.ctl.dto.TradeableData;
 import nl.andrewl.coyotecredit.dao.AccountRepository;
 import nl.andrewl.coyotecredit.model.Account;
diff --git a/src/main/java/nl/andrewl/coyotecredit/service/TradeableUpdateService.java b/src/main/java/nl/andrewl/coyotecredit/service/TradeableUpdateService.java
index b87eb9c..e98c531 100644
--- a/src/main/java/nl/andrewl/coyotecredit/service/TradeableUpdateService.java
+++ b/src/main/java/nl/andrewl/coyotecredit/service/TradeableUpdateService.java
@@ -9,6 +9,7 @@ import nl.andrewl.coyotecredit.dao.TradeableRepository;
 import nl.andrewl.coyotecredit.model.Tradeable;
 import nl.andrewl.coyotecredit.model.TradeableType;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.env.Environment;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Service;
 
@@ -32,6 +33,7 @@ import java.util.concurrent.TimeUnit;
 @Slf4j
 public class TradeableUpdateService {
 	private final TradeableRepository tradeableRepository;
+	private final Environment environment;
 
 	private final HttpClient httpClient = HttpClient.newHttpClient();
 	private final ObjectMapper objectMapper = new ObjectMapper();
@@ -57,7 +59,11 @@ public class TradeableUpdateService {
 		for (var tradeable : publicTradeables) {
 			// Special case of ignoring USD as the universal transfer currency.
 			if (tradeable.getSymbol().equals("USD")) continue;
-			executorService.schedule(() -> updateTradeable(tradeable), delay, TimeUnit.SECONDS);
+			if (environment.getProperty("coyote-credit.enable-tradeable-updates", Boolean.TYPE, true)) {
+				executorService.schedule(() -> updateTradeable(tradeable), delay, TimeUnit.SECONDS);
+			} else {
+				log.info("Tradeable update skipped for {}.", tradeable.getSymbol());
+			}
 			delay += POLYGON_API_TIMEOUT;
 		}
 	}
diff --git a/src/main/resources/application-development.properties b/src/main/resources/application-development.properties
index f7edcc9..e033f73 100644
--- a/src/main/resources/application-development.properties
+++ b/src/main/resources/application-development.properties
@@ -10,3 +10,4 @@ spring.mail.host=127.0.0.1
 spring.mail.port=1025
 
 coyote-credit.base-url=http://localhost:8080
+coyote-credit.enable-tradeable-updates=false
diff --git a/src/main/resources/static/js/transfer.js b/src/main/resources/static/js/transfer.js
index 84d0daf..2051a23 100644
--- a/src/main/resources/static/js/transfer.js
+++ b/src/main/resources/static/js/transfer.js
@@ -1,7 +1,14 @@
 const tradeableSelect = document.getElementById("tradeableSelect");
 const valueInput = document.getElementById("amountInput");
+const recipientNumberInput = document.getElementById("recipientNumberInput");
+const recipientNumberNote = document.getElementById("recipientNumberNote");
+
+const exchangeId = document.getElementById("exchangeIdInput").value;
+const accountNumberRegex = new RegExp("\\d{4}-\\d{4}-\\d{4}-\\d{4}");
 
 tradeableSelect.addEventListener("change", onSelectChanged);
+recipientNumberInput.addEventListener("change", onAccountNumberChanged);
+recipientNumberInput.addEventListener("keyup", onAccountNumberChanged);
 
 function onSelectChanged() {
     valueInput.value = null;
@@ -17,3 +24,52 @@ function onSelectChanged() {
         valueInput.setAttribute("min", 0.0000000001);
     }
 }
+
+/**
+ * Check that the account number that was entered is valid.
+ */
+function onAccountNumberChanged() {
+    const currentNumber = recipientNumberInput.value;
+    console.log("Account number changed to " + currentNumber);
+    if (currentNumber !== undefined && currentNumber.length > 0) {
+        if (accountNumberRegex.test(currentNumber)) {
+            recipientNumberNote.innerText = "Valid account number.";
+            fetch("/api/exchanges/" + exchangeId + "/accounts/" + currentNumber)
+                .then(response => {
+                    if (response.status === 200) {
+                        response.json()
+                            .then(data => {
+                                console.log(data);
+                                showRecipientNumberNote("info", "Account number is valid. Will transfer to <span class='fw-bold'>" + data.name + "</span>");
+                            })
+                            .catch(() => {
+                                showRecipientNumberNote("warning", "Could not find an account with that number.");
+                            });
+                    } else if (response.status === 404) {
+                        showRecipientNumberNote("warning", "Could not find an account with that number.");
+                    } else {
+                        showRecipientNumberNote("warning", "Error: Couldn't read API response.");
+                    }
+                })
+                .catch(error => {
+                    console.log(error);
+                    showRecipientNumberNote("warning", "API error occurred. Couldn't fetch account information.");
+                });
+        } else {
+            showRecipientNumberNote("warning", "Invalid account number. Format: <span class='monospace'>1234-1234-1234-1234</span>");
+        }
+    } else {
+        showRecipientNumberNote("info", "Enter an account number.");
+    }
+}
+
+function showRecipientNumberNote(type, text) {
+    recipientNumberNote.innerHTML = text;
+    if (type === "warning") {
+        recipientNumberNote.classList.add("text-danger");
+        recipientNumberNote.classList.remove("text-muted");
+    } else {
+        recipientNumberNote.classList.remove("text-danger");
+        recipientNumberNote.classList.add("text-muted");
+    }
+}
diff --git a/src/main/resources/templates/trade.html b/src/main/resources/templates/account/trade.html
similarity index 100%
rename from src/main/resources/templates/trade.html
rename to src/main/resources/templates/account/trade.html
diff --git a/src/main/resources/templates/account/transfer.html b/src/main/resources/templates/account/transfer.html
index a402028..2f30ce8 100644
--- a/src/main/resources/templates/account/transfer.html
+++ b/src/main/resources/templates/account/transfer.html
@@ -10,11 +10,12 @@
         Transfer funds to other accounts.
     </p>
     <form th:action="@{/accounts/{aId}/transfer(aId=${accountId})}" th:method="post">
+        <input type="hidden" id="exchangeIdInput" th:value="${data.exchangeId()}"/>
         <div class="mb-3">
             <label for="recipientNumberInput" class="form-label">Recipient Account Number</label>
-            <input type="text" name="recipientNumber" class="form-control" id="recipientNumberInput" required/>
-            <small class="text-muted">
-                Format: <span class="monospace">1234-1234-1234-1234</span><br>
+            <input type="text" name="recipientNumber" class="form-control monospace" id="recipientNumberInput" required/>
+            <small class="text-muted text-danger" id="recipientNumberNote">
+                Enter an account number.
             </small>
         </div>
         <div class="mb-3">
@@ -22,7 +23,7 @@
             <select class="form-select" id="tradeableSelect" name="tradeableId" required>
                 <option value="" selected disabled hidden>Choose something to send</option>
                 <option
-                        th:each="b : ${balances}"
+                        th:each="b : ${data.balances()}"
                         th:text="${b.symbol() + ' - Balance ' + b.amount()}"
                         th:value="${b.id()}"
                         th:data-amount="${b.amount()}"