add two contract view for getting job stats and verifier number

dqpu-contract/README.md

@@ -20,6 +20,12 @@ near create-account <your-account.testnet> --useFaucet
 near deploy <your-account.testnet> build/release/dqpu.wasm
 ```
 
+Now initialize it:
+
+```bash
+near call <contractId> <initMethod> '{"owner": ""}' --accountId <accountId>
+```
+
 ### 3. Retrieve data from view
 
 ```bash

dqpu-contract/sandbox-ts/main.ava.ts

@@ -66,13 +66,17 @@ test('add a verifier and check the status', async (t) => {
     let am_i: boolean = await contract.view('is_a_verifier', { account: alice.accountId });
     t.is(am_i, false);
 
+    t.is(await contract.view('get_number_of_verifiers', {}), 1);
+
     await owner.call(contract, 'add_verifier', { account: alice.accountId });
 
     am_i = await contract.view('is_a_verifier', { account: alice.accountId });
     t.is(am_i, true);
 
     am_i = await contract.view('is_a_verifier', { account: owner.accountId });
     t.is(am_i, true);
+
+    t.is(await contract.view('get_number_of_verifiers', {}), 2);
 });
 
 test('add a job and mark as invalid', async (t) => {

dqpu-contract/src/contract.ts

@@ -192,6 +192,26 @@ class DQPU {
         return this.jobs.length;
     }
 
+    @view({})
+    get_jobs_stats({ from_index = 0, limit = 1000 }: { from_index: number, limit: number }) {
+        const st = {};
+
+        for (const id of this.jobs.keys({ start: from_index, limit })) {
+            const j: Job = this.jobs.get(id);
+            if (! (j.status in st))
+                st[j.status] = 0;
+
+            st[j.status] += 1
+        }
+
+        return st;
+    }
+
+    @view({})
+    get_number_of_verifiers(): number {
+        return this.verifiers.length;
+    }
+
     @view({})
     get_handled_amount(): bigint {
         return this.money_handled;