A generic hook for fetching concrete features for wallet handles (#54)

Given a ‘handle’ to a wallet (either a `UiWallet` or a `UiWalletAccount`) and the name of a feature, this hook returns the feature object from the underlying Wallet Standard `Wallet`. In the event that the wallet or account does not support the feature, a `WalletStandardError` will be thrown.
```tsx
function ConnectButton({ children, wallet }) {
    const connectFeature = useWalletFeature(wallet, 'standard:connect') as StandardConnectFeature;
    return <button onClick={() => connectFeature.connect()}>{children}</button>;
}
function Error({ error }) {
    let message;
    if (isWalletStandardError(error, WALLET_STANDARD_ERROR__FEATURES__WALLET_FEATURE_UNIMPLEMENTED)) {
        const { featureName, walletName } = error.context;
        message = `The wallet '${walletName}' does not support the ${featureName} feature`;
    } else {
        message = 'Unknown error';
    }
    return <div className="errorMessage">{message}</div>;
}
function App() {
    return (
        <ErrorBoundary FallbackComponent={Error}>
            <ConnectButton>Connect</ConnectButton>
        </ErrorBoundary>
    );
}
```

Author: steveluscher

.changeset/swift-toys-begin.md

@@ -0,0 +1,5 @@
+---
+'@wallet-standard/ui-features': patch
+---
+
+A function that you can use to materialize a wallet feature by name, given a `UiWallet` or `UiWalletAccount`

packages/core/errors/src/codes.ts

@@ -29,6 +29,10 @@
 export const WALLET_STANDARD_ERROR__REGISTRY__WALLET_NOT_FOUND = 3834000 as const;
 export const WALLET_STANDARD_ERROR__REGISTRY__WALLET_ACCOUNT_NOT_FOUND = 3834001 as const;
 
+// Feature-related errors.
+// Reserve error codes in the range [6160000-6160999].
+export const WALLET_STANDARD_ERROR__FEATURES__WALLET_FEATURE_UNIMPLEMENTED = 6160002 as const;
+
 /**
  * A union of every Wallet Standard error code
  *
@@ -46,5 +50,6 @@ export const WALLET_STANDARD_ERROR__REGISTRY__WALLET_ACCOUNT_NOT_FOUND = 3834001
  * https://stackoverflow.com/a/28818850
  */
 export type WalletStandardErrorCode =
+    | typeof WALLET_STANDARD_ERROR__FEATURES__WALLET_FEATURE_UNIMPLEMENTED
     | typeof WALLET_STANDARD_ERROR__REGISTRY__WALLET_ACCOUNT_NOT_FOUND
     | typeof WALLET_STANDARD_ERROR__REGISTRY__WALLET_NOT_FOUND;

packages/core/errors/src/context.ts

@@ -1,4 +1,8 @@
-import type { WALLET_STANDARD_ERROR__REGISTRY__WALLET_ACCOUNT_NOT_FOUND, WalletStandardErrorCode } from './codes.js';
+import type {
+    WALLET_STANDARD_ERROR__REGISTRY__WALLET_ACCOUNT_NOT_FOUND,
+    WALLET_STANDARD_ERROR__FEATURES__WALLET_FEATURE_UNIMPLEMENTED,
+    WalletStandardErrorCode,
+} from './codes.js';
 
 type DefaultUnspecifiedErrorContextToUndefined<T> = {
     [P in WalletStandardErrorCode]: P extends keyof T ? T[P] : undefined;
@@ -12,6 +16,12 @@ type DefaultUnspecifiedErrorContextToUndefined<T> = {
  *   - Don't change or remove members of an error's context.
  */
 export type WalletStandardErrorContext = DefaultUnspecifiedErrorContextToUndefined<{
+    [WALLET_STANDARD_ERROR__FEATURES__WALLET_FEATURE_UNIMPLEMENTED]: {
+        featureName: string;
+        supportedFeatures: string[];
+        supportedChains: string[];
+        walletName: string;
+    };
     [WALLET_STANDARD_ERROR__REGISTRY__WALLET_ACCOUNT_NOT_FOUND]: {
         address: string;
         walletName: string;

packages/core/errors/src/messages.ts

@@ -1,5 +1,6 @@
 import type { WalletStandardErrorCode } from './codes.js';
 import {
+    WALLET_STANDARD_ERROR__FEATURES__WALLET_FEATURE_UNIMPLEMENTED,
     WALLET_STANDARD_ERROR__REGISTRY__WALLET_ACCOUNT_NOT_FOUND,
     WALLET_STANDARD_ERROR__REGISTRY__WALLET_NOT_FOUND,
 } from './codes.js';
@@ -16,6 +17,8 @@ export const WalletStandardErrorMessages: Readonly<{
     // TypeScript will fail to build this project if add an error code without a message.
     [P in WalletStandardErrorCode]: string;
 }> = {
+    [WALLET_STANDARD_ERROR__FEATURES__WALLET_FEATURE_UNIMPLEMENTED]:
+        "The wallet '$walletName' does not support the `$featureName` feature",
     [WALLET_STANDARD_ERROR__REGISTRY__WALLET_ACCOUNT_NOT_FOUND]:
         "No account with address $address could be found in the '$walletName' wallet",
     [WALLET_STANDARD_ERROR__REGISTRY__WALLET_NOT_FOUND]:

packages/react/core/package.json

@@ -37,6 +37,7 @@
     "dependencies": {
         "@wallet-standard/app": "workspace:^",
         "@wallet-standard/base": "workspace:^",
+        "@wallet-standard/errors": "workspace:^",
         "@wallet-standard/experimental-features": "workspace:^",
         "@wallet-standard/features": "workspace:^",
         "@wallet-standard/ui": "workspace:^",

packages/react/core/tsconfig.all.json

@@ -7,6 +7,9 @@
         {
             "path": "../../core/base/tsconfig.all.json"
         },
+        {
+            "path": "../../core/errors/tsconfig.all.json"
+        },
         {
             "path": "../../core/features/tsconfig.all.json"
         },

packages/ui/_/package.json

@@ -31,7 +31,8 @@
     },
     "dependencies": {
         "@wallet-standard/ui-compare": "workspace:^",
-        "@wallet-standard/ui-core": "workspace:^"
+        "@wallet-standard/ui-core": "workspace:^",
+        "@wallet-standard/ui-features": "workspace:^"
     },
     "devDependencies": {
         "shx": "^0.3.4"

packages/ui/_/src/index.ts

@@ -1,2 +1,3 @@
 export * from '@wallet-standard/ui-compare';
 export * from '@wallet-standard/ui-core';
+export * from '@wallet-standard/ui-features';

packages/ui/_/tsconfig.all.json

@@ -7,6 +7,9 @@
         {
             "path": "../compare/tsconfig.all.json"
         },
+        {
+            "path": "../features/tsconfig.all.json"
+        },
         {
             "path": "./tsconfig.cjs.json"
         },

packages/ui/features/.gitignore

@@ -0,0 +1 @@
+lib

packages/ui/features/CHANGELOG.md

@@ -0,0 +1 @@
+# @wallet-standard/ui-features

packages/ui/features/LICENSE

@@ -0,0 +1,202 @@
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packages/ui/features/README.md

@@ -0,0 +1,35 @@
+# `@wallet-standard/ui-features`
+
+This package includes functions useful for getting wallet and wallet accounts features.
+
+## Functions
+
+### `getWalletFeature(uiWalletHandle, featureName)`
+
+Given a ‘handle’ to a wallet (either a `UiWallet` or a `UiWalletAccount`) and the name of a feature, this function returns the feature object from the underlying Wallet Standard `Wallet`. If the wallet does not support the feature, a `WalletStandardError` will be thrown.
+
+```tsx
+function ConnectButton({ children, wallet }) {
+    const connectFeature = getWalletFeature(wallet, 'standard:connect') as StandardConnectFeature;
+    return <button onClick={() => connectFeature.connect()}>{children}</button>;
+}
+
+function Error({ error }) {
+    let message;
+    if (isWalletStandardError(error, WALLET_STANDARD_ERROR__FEATURES__WALLET_FEATURE_UNIMPLEMENTED)) {
+        const { featureName, walletName } = error.context;
+        message = `The wallet '${walletName}' does not support the ${featureName} feature`;
+    } else {
+        message = 'Unknown error';
+    }
+    return <div className="errorMessage">{message}</div>;
+}
+
+function App() {
+    return (
+        <ErrorBoundary FallbackComponent={Error}>
+            <ConnectButton>Connect</ConnectButton>
+        </ErrorBoundary>
+    );
+}
+```

packages/ui/features/package.json

@@ -0,0 +1,42 @@
+{
+    "name": "@wallet-standard/ui-features",
+    "version": "0.0.0",
+    "author": "Solana Maintainers <maintainers@solana.foundation>",
+    "repository": "https://github.com/wallet-standard/wallet-standard",
+    "license": "Apache-2.0",
+    "publishConfig": {
+        "access": "public"
+    },
+    "files": [
+        "lib",
+        "src",
+        "LICENSE"
+    ],
+    "engines": {
+        "node": ">=16"
+    },
+    "type": "module",
+    "sideEffects": false,
+    "main": "./lib/cjs/index.js",
+    "module": "./lib/esm/index.js",
+    "types": "./lib/types/index.d.ts",
+    "exports": {
+        "require": "./lib/cjs/index.js",
+        "import": "./lib/esm/index.js",
+        "types": "./lib/types/index.d.ts"
+    },
+    "scripts": {
+        "clean": "shx mkdir -p lib && shx rm -rf lib",
+        "package": "shx mkdir -p lib/cjs && shx echo '{ \"type\": \"commonjs\" }' > lib/cjs/package.json",
+        "test": "jest -c ../../../node_modules/@wallet-standard/test-config/jest.config.ts --rootDir ."
+    },
+    "dependencies": {
+        "@wallet-standard/base": "workspace:*",
+        "@wallet-standard/errors": "workspace:*",
+        "@wallet-standard/ui-core": "workspace:*",
+        "@wallet-standard/ui-registry": "workspace:*"
+    },
+    "devDependencies": {
+        "shx": "^0.3.4"
+    }
+}