feat(wallet_build_transformer): add flexible CDN configuration

packages/komodo_wallet_build_transformer/lib/src/steps/fetch_coin_assets_build_step.dart

@@ -38,13 +38,8 @@ class FetchCoinAssetsBuildStep extends BuildStep {
     String? githubToken,
   }) {
     final config = buildConfig.coinCIConfig.copyWith(
-      // If the branch is `master`, use the repository mirror URL to avoid
-      // rate limiting issues. Consider refactoring config to allow branch
-      // specific mirror URLs to remove this workaround.
-      coinsRepoContentUrl:
-          buildConfig.coinCIConfig.isMainBranch
-              ? buildConfig.coinCIConfig.coinsRepoContentUrl
-              : buildConfig.coinCIConfig.rawContentUrl,
+      // Use the effective content URL which checks CDN mirrors
+      coinsRepoContentUrl: buildConfig.coinCIConfig.effectiveContentUrl,
     );
 
     final provider = GithubApiProvider.withBaseUrl(

packages/komodo_wallet_build_transformer/lib/src/steps/models/coin_assets/coin_build_config.dart

@@ -22,6 +22,7 @@ class CoinBuildConfig {
     required this.mappedFiles,
     required this.mappedFolders,
     required this.concurrentDownloadsEnabled,
+    this.cdnBranchMirrors = const {},
   });
 
   /// Creates a new instance of [CoinBuildConfig] from a JSON object.
@@ -42,17 +43,17 @@ class CoinBuildConfig {
       mappedFolders: Map<String, String>.from(
         json['mapped_folders'] as Map<String, dynamic>? ?? {},
       ),
+      cdnBranchMirrors: Map<String, String>.from(
+        json['cdn_branch_mirrors'] as Map<String, dynamic>? ?? {},
+      ),
     );
   }
 
-  bool get isMainBranch =>
-      coinsRepoBranch == 'master' || coinsRepoBranch == 'main';
-
-  String get rawContentUrl =>
-      'https://raw.githubusercontent.com/KomodoPlatform/coins/refs/heads/$coinsRepoBranch';
-
-  static const String cdnContentUrl =
-      'https://api.github.com/repos/KomodoPlatform/coins';
+  /// Gets the appropriate content URL for the current branch.
+  /// If a CDN mirror is configured for the branch, it uses that.
+  /// Otherwise, it falls back to the configured coinsRepoContentUrl.
+  String get effectiveContentUrl =>
+      cdnBranchMirrors[coinsRepoBranch] ?? coinsRepoContentUrl;
 
   /// Indicates whether fetching updates of the coins assets are enabled.
   final bool fetchAtBuildEnabled;
@@ -97,6 +98,12 @@ class CoinBuildConfig {
   /// corresponding paths in the GitHub repository.
   final Map<String, String> mappedFolders;
 
+  /// A map of branch names to CDN mirror URLs.
+  /// When downloading assets, if the current branch has a CDN mirror configured,
+  /// it will be used instead of the default content URL.
+  /// This helps avoid rate limiting for commonly used branches.
+  final Map<String, String> cdnBranchMirrors;
+
   CoinBuildConfig copyWith({
     String? bundledCoinsRepoCommit,
     bool? fetchAtBuildEnabled,
@@ -108,6 +115,7 @@ class CoinBuildConfig {
     bool? concurrentDownloadsEnabled,
     Map<String, String>? mappedFiles,
     Map<String, String>? mappedFolders,
+    Map<String, String>? cdnBranchMirrors,
   }) {
     return CoinBuildConfig(
       fetchAtBuildEnabled: fetchAtBuildEnabled ?? this.fetchAtBuildEnabled,
@@ -123,6 +131,7 @@ class CoinBuildConfig {
           concurrentDownloadsEnabled ?? this.concurrentDownloadsEnabled,
       mappedFiles: mappedFiles ?? this.mappedFiles,
       mappedFolders: mappedFolders ?? this.mappedFolders,
+      cdnBranchMirrors: cdnBranchMirrors ?? this.cdnBranchMirrors,
     );
   }
 
@@ -138,6 +147,7 @@ class CoinBuildConfig {
     'mapped_files': mappedFiles,
     'mapped_folders': mappedFolders,
     'concurrent_downloads_enabled': concurrentDownloadsEnabled,
+    'cdn_branch_mirrors': cdnBranchMirrors,
   };
 
   /// Loads the coins runtime update configuration synchronously from the

packages/komodo_wallet_build_transformer/lib/src/steps/models/github/github_file.dart

@@ -18,33 +18,34 @@ class GitHubFile {
 
   /// Creates a new instance of [GitHubFile] from a JSON map.
   factory GitHubFile.fromJson(Map<String, dynamic> data) => GitHubFile(
-        name: data['name'] as String,
-        path: data['path'] as String,
-        sha: data['sha'] as String,
-        size: data['size'] as int,
-        url: data['url'] as String?,
-        htmlUrl: data['html_url'] as String?,
-        gitUrl: data['git_url'] as String?,
-        downloadUrl: data['download_url'] as String,
-        type: data['type'] as String,
-        links: data['_links'] == null
+    name: data['name'] as String,
+    path: data['path'] as String,
+    sha: data['sha'] as String,
+    size: data['size'] as int,
+    url: data['url'] as String?,
+    htmlUrl: data['html_url'] as String?,
+    gitUrl: data['git_url'] as String?,
+    downloadUrl: data['download_url'] as String,
+    type: data['type'] as String,
+    links:
+        data['_links'] == null
             ? null
             : Links.fromJson(data['_links'] as Map<String, dynamic>),
-      );
+  );
 
   /// Converts the [GitHubFile] instance to a JSON map.
   Map<String, dynamic> toJson() => <String, dynamic>{
-        'name': name,
-        'path': path,
-        'sha': sha,
-        'size': size,
-        'url': url,
-        'html_url': htmlUrl,
-        'git_url': gitUrl,
-        'download_url': downloadUrl,
-        'type': type,
-        '_links': links?.toJson(),
-      };
+    'name': name,
+    'path': path,
+    'sha': sha,
+    'size': size,
+    'url': url,
+    'html_url': htmlUrl,
+    'git_url': gitUrl,
+    'download_url': downloadUrl,
+    'type': type,
+    '_links': links?.toJson(),
+  };
 
   /// The name of the file.
   final String name;
@@ -103,15 +104,15 @@ class GitHubFile {
     );
   }
 
-  GitHubFile withStaticHostingUrl(String branch) {
-    final staticHostingUrls = {
-      'master': 'https://komodoplatform.github.io/coins',
-    };
+  GitHubFile withStaticHostingUrl(
+    String branch,
+    Map<String, String> cdnMirrors,
+  ) {
+    // Check if a CDN mirror is configured for this branch
+    final cdnUrl = cdnMirrors[branch];
 
     return copyWith(
-      downloadUrl: staticHostingUrls.containsKey(branch)
-          ? '${staticHostingUrls[branch]}/$path'
-          : downloadUrl,
+      downloadUrl: cdnUrl != null ? '$cdnUrl/$path' : downloadUrl,
     );
   }
 }