Add swift examples

src/guide/getting_started.md

@@ -74,12 +74,22 @@ if let Some(node_state) = sdk.node_info()? {
 The first step is to register a new node
 ## Registering a new node
 ```swift
-// TODO
+do {
+ let seed = try mnemonicToSeed(phrase: "<mnemonics words>");
+ let invite_code = <your greenlight invite code>;
+
+ // register_node takes either greenlight credentials (certifate & key) or invite code. 
+ // At this example we are using the invite code option.
+ let credentials = try registerNode(network: Network.bitcoin, seed: seed, inviteCode: inviteCode); 
+} catch SdkError.Error(let message) {
+  print(message)
+}
 ```
 
 ## Recovering an existing node
 ```swift
-// TODO
+ let seed = try mnemonicToSeed(phrase: "<mnemonics words>");
+ let credentials = try recoverNode(network: Network.bitcoin, seed: seed);
 ```
 
 Once the credentials are retrieved they should be saved in a secured storage.
@@ -87,15 +97,41 @@ The next step is to initialize the SDK and start the node:
 
 ## Initializing the SDK
 ```swift
-/* TODO
-*/
+
+// SDK events listener
+class SDKListener: EventListener {
+    func onEvent(e: BreezEvent) {
+        print("received event ", e);
+    }
+}
+
+// Create the default config
+let config = breez_sdk.defaultConfig(envType: EnvironmentType.production)
+
+// Customize the config object according to your needs
+config.apiKey = "your API key";
+config.workingDir = "path to an existing directory";
+
+do {
+ let sdkServices = try initServices(config: config, seed: seed, creds: credentials, listener: SDKListener());
+ try sdkServices.start();
+} catch SdkError.Error(let message) {
+  print(message)
+}
 ```
 
 At any point we can fetch our balance from the Greenlight node:
 
 ```swift
-// TODO
+do {
+ let nodeInfo = try sdkServices.nodeInfo();
+ let lnBalance = nodeInfo.channelsBalanceMsat;
+ let onchainBalance = nodeInfo.onchainBalanceMsat;
+} catch SdkError.Error(let message) {
+  print(message)
+}
 ```
+
 </section>
 </custom-tabs>
 

src/guide/lnurl_auth.md

@@ -1,6 +1,9 @@
 # LNURL-Auth
 
 ## Usage
+<custom-tabs category="lang">
+<div slot="title">Rust</div>
+<section>
 
 ```rust,no_run
 // Endpoint can also be of the form:
@@ -21,7 +24,33 @@ if let Ok(LnUrlAuth{data: ad}) = parse(lnurl_auth_url).await {
     }
 }
 ```
+</section>
+<div slot="title">Swift</div>
+<section>
 
+```swift
+// Endpoint can also be of the form:
+// keyauth://domain.com/auth?key=val
+let lnurlAuthUrl = "lnurl1dp68gurn8ghj7mr0vdskc6r0wd6z7mrww4excttvdankjm3lw3skw0tvdankjm3xdvcn6vtp8q6n2dfsx5mrjwtrxdjnqvtzv56rzcnyv3jrxv3sxqmkyenrvv6kve3exv6nqdtyv43nqcmzvdsnvdrzx33rsenxx5unqc3cxgeqgntfgu";
+
+do {
+ let inputType = try parseInput(s: lnurlAuthUrl)
+ if case .lnUrlAuth(data) = inputType {
+    let result = try sdk.lnurlAuth(data)
+    switch result {
+    case .ok:
+        print("Successfully authenticated")
+    case .errorStatus(data):
+        print("Failed to authenticate")
+    }    
+ }
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+
+</section>
+</custom-tab>
 
 ## Supported Specs
 

src/guide/lnurl_pay.md

@@ -2,6 +2,10 @@
 
 ## Usage
 
+<custom-tabs category="lang">
+<div slot="title">Rust</div>
+<section>
+
 ```rust,no_run
 // Endpoint can also be of the form:
 // lnurlp://domain.com/lnurl-pay?key=val
@@ -17,6 +21,27 @@ if let Ok(LnUrlPay{data: pd}) = parse(lnurl_pay_url).await {
 }
 ```
 
+</section>
+<div slot="title">Swift</div>
+<section>
+
+```swift
+// Endpoint can also be of the form:
+// lnurlp://domain.com/lnurl-pay?key=val
+// lnurl1dp68gurn8ghj7mr0vdskc6r0wd6z7mrww4excttsv9un7um9wdekjmmw84jxywf5x43rvv35xgmr2enrxanr2cfcvsmnwe3jxcukvde48qukgdec89snwde3vfjxvepjxpjnjvtpxd3kvdnxx5crxwpjvyunsephsz36jf
+let lnurlPayUrl = "lightning@address.com";
+do {
+ let inputType = try parseInput(s: input)
+ if case .lnUrlPay(data) = inputType {
+    let amountSats = inputType.minSendable;
+    try sdk.payLnurl(amountSats: amountSats, "comment", reqData: data)
+ }
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+</section>
+</custom-tab>
 
 ## Supported Specs
 

src/guide/lnurl_withdraw.md

@@ -3,6 +3,10 @@
 
 ## Usage
 
+<custom-tabs category="lang">
+<div slot="title">Rust</div>
+<section>
+
 ```rust,no_run
 // Endpoint can also be of the form:
 // lnurlw://domain.com/lnurl-withdraw?key=val
@@ -16,7 +20,29 @@ if let Ok(LnUrlWithdraw{data: wd}) = parse(lnurl_withdraw_url).await {
     sdk.lnurl_withdraw(wd, amount_msat, Some(description)).await?;
 }
 ```
+</section>
+<div slot="title">Swift</div>
+<section>
 
+```swift
+// Endpoint can also be of the form:
+// lnurlw://domain.com/lnurl-withdraw?key=val
+let lnurlWithdrawUrl = "lnurl1dp68gurn8ghj7mr0vdskc6r0wd6z7mrww4exctthd96xserjv9mn7um9wdekjmmw843xxwpexdnxzen9vgunsvfexq6rvdecx93rgdmyxcuxverrvcursenpxvukzv3c8qunsdecx33nzwpnvg6ryc3hv93nzvecxgcxgwp3h33lxk";
+
+do {
+ let inputType = try parseInput(s: input)
+ if case .lnUrlWithdraw(data) = inputType {
+    let amountSat = data.minWithdrawable;
+    let description = "Test withdraw"
+    try sdk.withdrawLnurl(amountSats: amountSat, description: "comment", reqData: data)
+ }
+} catch SdkError.Error(let message) {
+  print(message)
+}
+
+```
+</section>
+</custom-tab>
 
 ## Supported Specs
 

src/guide/payments.md

@@ -1,5 +1,8 @@
 # Sending and receiving Lightning payments
 
+<custom-tabs category="lang">
+<div slot="title">Rust</div>
+<section>
 ## Receiving Lightning Payments
 Breez SDK doesn't require you to open a channel and set up your inbound liquidity.
 Breez SDK automatically connects your node to the LSP peer and you can now receive payments:
@@ -20,3 +23,42 @@ let node_id = "...";
 sdk.send_payment(node_id.into(), Some(3000)).await?;
 ```
 
+</section>
+<div slot="title">Swift</div>
+
+## Receiving Lightning Payments
+Breez SDK doesn't require you to open a channel and set up your inbound liquidity.
+Breez SDK automatically connects your node to the LSP peer and you can now receive payments:
+
+```swift
+do {
+ let invoice = try sdk.receivePayment(amountSats: 3000, description: "Invoice for 3000 sats")
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+
+## Sending Lightning Payments
+```swift
+let bolt11 = "...";
+do {
+ let payment = try sdk.sendPayment(bolt11: bolt11, amountSats: 3000)
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+
+## Sending Spontaneous Lightning Payments
+```swift
+let nodeId = "...";
+do {
+ let payment = try sdk.sendSpontaneousPayment(nodeId: nodeId, amountSats: 3000)
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+
+<section>
+
+</section>
+</custom-tabs>

src/guide/recieve_onchain.md

@@ -1,6 +1,10 @@
 # Receiving an on-chain transaction (swap-in)
 There are cases when you have funds in some bitcoin address and you would like to send those to your lightning node.
 
+<custom-tabs category="lang">
+<div slot="title">Rust</div>
+<section>
+
 ```rust,no_run
 let swap_info = sdk.receive_onchain().await?;
 
@@ -29,6 +33,62 @@ Once you have a refundable swap in hand, use the follwing code to execute a refu
 
 ```rust,no_run
 let destination_address = "...".into()
-let sat_per_byte = <efund tx fee rate>
-sdk.refund(refundable.bitcoin_address, destination_address, sat_per_byte).await?
+let sat_per_vbyte = <refund tx fee rate>
+sdk.refund(refundable.bitcoin_address, destination_address, sat_per_vbyte).await?
 ```
+</section>
+<div slot="title">Swift</div>
+<section>
+
+```swift
+do {
+ let swapInfo = try sdk.receiveOnchain();
+
+ // Send your funds to the bellow bitcoin address
+ let address = swapInfo.bitcoinAddress;
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+
+Once you've sent the funds to the above address, the SDK will monitor this address for unspent confirmed outputs and use a trustless submarine swap to receive these into your Lightning node. You can always monitor the status of the current in-progress swap using the following code:
+
+```swift
+do {
+ let swapInfo = try sdk.inProgressSwap()
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+
+The process of receiving funds via an on-chain address is trustless and uses a submarine swap. This means there are two ways to spend the sent funds:
+
+1. Either by a preimage that is exposed when the Lightning payment is completed - this is the positive case where the swap was successful.
+2. Or by your node when the swap didn't complete within a certain timeout - this is the negative case where your node will execute a refund.
+
+In order to execute a refund, you need to supply an on-chain address to where the refunded amount will be sent. The following code will retrieve the refundable swaps:
+
+```swift
+do {
+ let refundables = try sdk.listRefundables()
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+
+Once you have a refundable swap in hand, use the follwing code to execute a refund:
+
+```swift
+let destinationAddress = "..."
+let satPerVbyte = <refund tx fee rate>
+do {
+ try sdk.refund(
+  swapAddress: refundable.bitcoinAddress, 
+  toAddress: destinationAddress, 
+  satPerVbyte: satPerVbyte)
+} catch SdkError.Error(let message) {
+  print(message)
+}
+```
+</section>
+</custom-tabs>

src/guide/send_onchain.md

@@ -4,6 +4,10 @@ You can send funds from the Breez SDK wallet to an on-chain address as follows.
 
 First, fetch the current reverse swap fees:
 
+<custom-tabs category="lang">
+<div slot="title">Rust</div>
+<section>
+
 ```rust,no_run
 let current_fees = sdk.fetch_reverse_swap_fees().await?;
 
@@ -43,7 +47,59 @@ for rs in sdk.in_progress_reverse_swaps().await? {
     info!("Reverse swap {} in progress, status is {}", rs.id, rs.breez_status);
 }
 ```
+</section>
+<div slot="title">Swift</div>
+<section>
 
+```swift
+try {
+ let currentFees = try sdk.fetchReverseSwapFees()
+
+ println("Percentage fee for the reverse swap service: \(currentFees.feesPercentage))");
+ println("Estimated miner fees in sats for locking up funds: \(currentFees.feesLockup)");
+ println("Estimated miner fees in sats for claiming funds: \(currentFees.feesClaim)");
+} catch {
+    print(error)
+}
+```
+
+The reverse swap will involve two on-chain transactions, for which the mining fees can only be estimated. They will happen
+automatically once the process is started, but the last two values above are these estimates to help you get a picture
+of the total costs.
+
+Fetching the fees also tells you what is the range of amounts you can send:
+
+```swift
+println("Minimum amount, in sats: \(current_fees.min)");
+println("Maximum amount, in sats: \(current_fees.max)");
+```
+
+Once you checked the fees are acceptable, you can start the reverse swap:
+
+```swift
+let destinationAddress = "bc1..";
+let amountSat = currentFees.min;
+let satPerVbyte = <fee rate>
+try {
+ try sdk.sendOnchain(amountSat: amountSat, onchainRecipientAddress: destinationAddress, pairHash: currentFees.feesHash, satPerVbyte: satPerVbyte)
+} catch {
+    print(error)
+}
+```
+
+Starting the reverse swap will trigger a HODL invoice payment, which will only be settled if the entire swap completes.
+This means you will see an outgoing pending payment in your list of payments, which locks those funds until the invoice
+is either settled or cancelled. This will happen automatically at the end of the reverse swap.
+
+You can check its status with:
+
+```swift
+for rs in sdk.inProgressReverseSwaps() {
+    println("Reverse swap \(rs.id) in progress, status is \(rs.breezStatus)");
+}
+```
+</section>
+</custom-tabs>
 If the reverse swap is successful, you'll get the on-chain payment on your destination address and the HODL invoice will
 change from pending to settled.