strict tsconfig, reverse resolve

README.md

@@ -37,3 +37,44 @@ const resolver = new Resolver(rpc, tld_mapping);
 console.log(await resolver.resolve("nishina247", "mictest"));
 ```
 
+### Resolve Backwards
+
+Only do this if you have a good reason to. Here's a hastily written code sample:
+
+```js
+import * as bns from "banani-bns";
+
+const rpc = new bns.banani.RPC("https://kaliumapi.appditto.com/api");
+
+const TLDS: Record<string, `ban_${string}` | `nano_${string}`> = {
+  "mictest": "ban_1dzpfrgi8t4byzmdeidh57p14h5jwbursf1t3ztbmeqnqqdcbpgp9x8j3cw6",
+  "jtv": "ban_3gipeswotbnyemcc1dejyhy5a1zfgj35kw356dommbx4rdochiteajcsay56",
+  "ban": "ban_1fdo6b4bqm6pp1w55duuqw5ebz455975o4qcp8of85fjcdw9qhuzxsd3tjb9",
+};
+
+const resolver = new bns.Resolver(rpc, TLDS);
+
+//Only looks through last 500 received transactions and 50 receivable transactions, for simplicity
+//You can easily modify this to go further, though a lot more RPC calls could be made (eg, some accounts may have hundreds of thousands of blocks), so be careful.
+async function find_bns_domains_for_account(account: bns.banani.Address, tld: string) {
+  //search up to 50 receivable blocks, find the what are likely to be Domain Resolver blocks
+  let receivable_resp = (await rpc.get_account_receivable(account, 50, "4224", true)).blocks;
+  let possible_domain_accounts = Object.keys(receivable_resp).filter((hash) => receivable_resp[hash].amount === "4224").map((hash) => receivable_resp[hash].source);
+  //now look through the last 500 received transactions
+  possible_domain_accounts.push(...(await rpc.get_account_history(account, 500)).history.filter((info) => info.type === "receive" && info.amount === "4224").map((info) => info.account));
+  //console.log(possible_domain_accounts);
+  let domains = [];
+  //now fetch those domains!
+  for (const possible of possible_domain_accounts) {
+    //console.log(possible);
+    try {
+      let domain = await resolver.resolve_backwards_ish(possible as bns.banani.Address, tld);
+      if (domain) domains.push(domain);
+    } catch (_) {}
+  }
+  return domains;
+}
+
+console.log(await find_bns_domains_for_account("ban_1o7ija3mdbmpzt8qfnck583tn99fiupgbyzxtbk5h4g6j57a7rawge6yzxqp", "ban"));
+```
+