Update submarine-swap.md

tech/research/submarine-swap.md

@@ -142,6 +142,7 @@ Monitor Output:
 [Loop sweeps the HTLC](https://blockstream.info/testnet/tx/4dc4c183d937747db543a2f08753e16aa06ba688670ae9a1d24937f7544d4619)
 
 INVOICE for swap (hint: use the [invoice decoder](https://ion.radar.tech/developers#decode)): **lntb19979u1pwa9wm9pp53qz8v3ua2jfvpgwmh7pa2hy32pxtqqxphmk2vhmj5l6rfp70xx2sdq8wdmkzuqcqzpgxq97zvuqum3je4pe5kwf539taw0dqvj0kg9yyynvk323ngkaaq75kcwzcwmpjyp3c7fax8eeqhp0qxuzmx2xsl57v4w6da39tqlttsalyafd2tcpkl6ngz**
+
 ![image](https://user-images.githubusercontent.com/45073251/69437256-b3368d00-0d21-11ea-8015-fcdff40a75f1.png)
 
 The HTLC bitcoin script:
@@ -227,9 +228,11 @@ Channel final state:
 ![image](https://user-images.githubusercontent.com/45073251/69437071-520eb980-0d21-11ea-89b2-f1a4348f65c7.png)
 
 Swap payment (hint: use the [invoice decoder](https://ion.radar.tech/developers#decode)): **lntb20007630n1pwue5aepp5x6xufy356gvexl0z4hnvakpu3zry0y0ufwd5phz2nrt0glk6wwvsdq8wdmkzuqcqzxgxq97zvuq7cn6xqanj28xw6hs47w64ag9zmzhqgxx6sl2s0437evmcma6wqk3hxwegm4ctrdf009gfvp955ezxn2mrv0s5x00zxvu9lureyq5ptqqx44865**
+
 ![image](https://user-images.githubusercontent.com/45073251/69437401-027cbd80-0d22-11ea-9393-a5165e90b233.png)
 
 Prepayment (hint: use the [invoice decoder](https://ion.radar.tech/developers#decode)): **lntb13370n1pwue5aepp5vnsn7a56htw8rhck09ehzcuhy65tg2rjy2rae2nuljftcqte3c6qdq2wpex2urp0ycqzxgxq97zvuqvme3wmyfjp56a6s0s6nw0t736ptxn2gdn0yv5vrj0qz2h4yu2hvpk6wau5cdk9k7xasfdjqw9nlgf5tpevp5rwcugzjdgdwnf2mm3fqqtj860s**
+
 ![image](https://user-images.githubusercontent.com/45073251/69437459-1c1e0500-0d22-11ea-9678-d2e6e7b53f47.png)
 
 [The swap HTLC](https://blockstream.info/testnet/address/tb1qd9tfq2fjfyyylmwekfukde69jetexg0zn0c8u48mya6v8r2wz65s8c6pka)