React Native Lib Readme Init

js/packages/seed-vault/README.md

@@ -1,3 +1,60 @@
 # `@solana-mobile/seedvaultlib`
 
 A React Native wrapper of the Seed Vault SDK.
+
+# Usage
+
+### Check if Seed Vault is Available
+We first need to check if the seed vault service is available on the device. Currently only Saga implementes a seed vault. 
+```javascript
+cosnt allowSimulated = false; // use true to allow simulated seed vault (for dev/testing)
+const seedVaultAvailable = await SolanaMobileSeedVaultLib.isSeedVaultAvailable(allowSimulated);
+if (!seedVaultAvailable) {
+  // seed vault is not available, we cant use it
+}
+```
+
+### Add Listeners
+
+Before interacting with Seed Vault, you should first register callbacks from the Seed Vault service using the `useSeedVault` hook.
+```javascript
+
+var seedVaultEventListener = (event) => {
+    // event is SeedVaultEvent type
+    // handle event here
+};
+
+var seedVaultContentChangeListener = (contentChangeEvent) => {
+    // contentChangeEvent is SeedVaultContentChange type
+    // handle content change here
+};
+
+useSeedVault(seedVaultEventListener, seedVaultContentChangeListener);
+```
+
+### Authorize a Seed
+Before our app can urequest signatures form seed vault, we must first request authorization for our app to use a seed from the user.
+```javascript
+NativeModules.SeedVaultLib.authorizeNewSeed();
+```
+
+### Retreive a list of Authorized Seeds
+To retreive a list of all the seeds our app has been authorized to use, call `getAuthorizedSeeds()`.
+```javascript
+const authorizedSeeds = await NativeModules.SolanaMobileSeedVaultLib.getAuthorizedSeeds();
+```
+
+### Get Accounts for a given seed
+Once we have obtained an authorized seed, we can get a list of all the accounts (public keys) assocaited with that seed
+```javascript
+const seed = authorizedSeeds[0]; 
+const accounts = await NativeModules.SolanaMobileSeedVaultLib.getAccounts(seed.authToken);
+```
+
+### Sign a Payload
+Once we have obtained an accont, we can request signatures from seed vault for that account: 
+```javascript
+NativeModules.SolanaMobileSeedVaultLib.signMessage(seed.authToken, accounts[0].derivationPath, messageBytes);
+NativeModules.SolanaMobileSeedVaultLib.signTransaction(seed.authToken, accounts[0].derivationPath, transactionByteArray);
+```
+