snippets for sweeping funds on channel closes. (#110)

* Bump breez-sdk snippet dependency to 0.2.12

* Bump the Swift snippet macos version to v13

* Bump breez-sdk snippet dependency to 0.2.14

* swiftformat

* redeem_onchain_funds example

* Document swapinfo fields

* example on how to use local breez-sdk package

* fix dart example

* yarn lint

* remove swapinfo docs

* dart fixup

---------

Co-authored-by: ok300 <106775972+ok300@users.noreply.github.com>

snippets/go/closed_channel.go

@@ -0,0 +1,27 @@
+package example
+
+import (
+	"log"
+
+	"github.com/breez/breez-sdk-go/breez_sdk"
+)
+
+func PrepareRedeemOnchainFunds(feeRate uint32) {
+	// ANCHOR: prepare-redeem-onchain-funds
+	satPerVbyte := feeRate
+	destinationAddress := "bc1.."
+	req := breez_sdk.PrepareRedeemOnchainFundsRequest{SatPerVbyte: satPerVbyte, ToAddress: destinationAddress}
+	if prepareRedeemOnchainFundsResponse, err := sdk.PrepareRedeemOnchainFunds(req); err == nil {
+		log.Printf("PrepareRedeemOnchainFundsRequest is %#v", prepareRedeemOnchainFundsResponse)
+	}
+	// ANCHOR_END: prepare-redeem-onchain-funds
+}
+
+func RedeemOnchainFunds(satPerVbyte uint32, toAddress string) {
+	// ANCHOR: redeem-onchain-funds
+	req := breez_sdk.RedeemOnchainFundsRequest{SatPerVbyte: satPerVbyte, ToAddress: toAddress}
+	if redeemOnchainFundsResponse, err := sdk.RedeemOnchainFunds(req); err == nil {
+		log.Printf("RedeemOnchainFunds error %#v", redeemOnchainFundsResponse)
+	}
+	// ANCHOR_END: redeem-onchain-funds
+}