diff --git a/.gitignore b/.gitignore
index 7112b99..d29ee2b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,4 +39,4 @@ testem.log
 .DS_Store
 Thumbs.db
 
-db/mempool.json
+db/cache.json
diff --git a/src/api.ts b/src/api.ts
index b5f5060..6e4bea0 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -58,7 +58,7 @@ class Api {
     if (findblock) {
       return findblock.id;
     } else {
-      return '';
+      return mockGenerator.blocks[0].id;
     }
   }
 
diff --git a/src/index.ts b/src/index.ts
index e17be97..cfed753 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -68,6 +68,7 @@ class Server {
       .get('/stop-auto', (req: Request, res: Response) => { mockGenerator.setAuto(false); res.json('auto stopped'); })
 
       .get('/rbf', (req: Request, res: Response) => { res.send(mockGenerator.addRbfTransaction()); })
+      .get('/delete-random', (req: Request, res: Response) => { res.send(mockGenerator.deleteRandomTx()); })
       .get('/address/:address', (req: Request, res: Response) => res.json(api.getAddress(req.params.address)))
       .get('/address/:address/txs', (req: Request, res: Response) => res.json(api.getAddressTransactions(req.params.address)))
       .get('/address-prefix/:prefix', (req: Request, res: Response) => res.json(api.getAddressses(req.params.prefix)))
diff --git a/src/mock-generator.ts b/src/mock-generator.ts
index 873fc77..e20d06c 100644
--- a/src/mock-generator.ts
+++ b/src/mock-generator.ts
@@ -28,6 +28,10 @@ class MockGenerator {
     this.addBisqTransaction();
   }
 
+  deleteRandomTx() {
+    this.mempoolTransactions.pop();
+  }
+
   addBisqTransaction() {
     this.addTransactionToMempool(
       {'txid':'9ea4949cd3accdb4317e507937198ab5bc0bc07040079a9c8a2956fdbb054ed4','version':1,'locktime':0,'vin':[{'txid':'0c0ad832044d4fb6fa3210bbc478430fbf712386c1e644dd6aa3fec1611e3148','vout':0,'prevout':{'scriptpubkey':'76a91483882a62fdb3d6640cc665f80a3d511a5bcf0b3188ac','scriptpubkey_asm':'OP_DUP OP_HASH160 OP_PUSHBYTES_20 83882a62fdb3d6640cc665f80a3d511a5bcf0b31 OP_EQUALVERIFY OP_CHECKSIG','scriptpubkey_type':'p2pkh','scriptpubkey_address':'1CzUe5cy84JgJG7jQqjich6P9qXhUtZCX1','value':620},'scriptsig':'47304402203f327ef19b4853f6331d4fd73f2ffff687c17030955f9950b0d6360a1c0c142102206e913f87d2db80a8ff960ca1eecd595a03d042207e3e8fd149d15b651584ae8101210291096355cf995d7c961c50f2b319498b9513c2a51586dd7a2425c0084bbebef2','scriptsig_asm':'OP_PUSHBYTES_71 304402203f327ef19b4853f6331d4fd73f2ffff687c17030955f9950b0d6360a1c0c142102206e913f87d2db80a8ff960ca1eecd595a03d042207e3e8fd149d15b651584ae8101 OP_PUSHBYTES_33 0291096355cf995d7c961c50f2b319498b9513c2a51586dd7a2425c0084bbebef2','is_coinbase':false,'sequence':4294967295},{'txid':'0401cafaee7684b7b5ff119377a96096b07c25e872ed5d1d841c44da3618b861','vout':0,'prevout':{'scriptpubkey':'76a91453df36e60de2636fd331fd901c6581b99afc9cf188ac','scriptpubkey_asm':'OP_DUP OP_HASH160 OP_PUSHBYTES_20 53df36e60de2636fd331fd901c6581b99afc9cf1 OP_EQUALVERIFY OP_CHECKSIG','scriptpubkey_type':'p2pkh','scriptpubkey_address':'18eUV8kcv3BA7fghsSZfjTesRGi5e4dG8Q','value':9763},'scriptsig':'483045022100c7c87237eb817d8239ca81d5d7f61cb50af7601f91e17367c317c977ee3d44860220751292858e2061825df647c62a022fe9c29fc1ccb8c5c8edf3abb05de0d27fe50121023ae2ad208bdcccf6dcded15dde5c25361f9b24fe49e21a1bc0e0c43d83ae9aff','scriptsig_asm':'OP_PUSHBYTES_72 3045022100c7c87237eb817d8239ca81d5d7f61cb50af7601f91e17367c317c977ee3d44860220751292858e2061825df647c62a022fe9c29fc1ccb8c5c8edf3abb05de0d27fe501 OP_PUSHBYTES_33 023ae2ad208bdcccf6dcded15dde5c25361f9b24fe49e21a1bc0e0c43d83ae9aff','is_coinbase':false,'sequence':4294967295},{'txid':'d1aa28bdc2aa23721d3cd752096e5d63b4a7e97b1108cad2a22ef6fa5e119594','vout':0,'prevout':{'scriptpubkey':'76a914e278a3943077f29a9d1e708d482cc247726b466088ac','scriptpubkey_asm':'OP_DUP OP_HASH160 OP_PUSHBYTES_20 e278a3943077f29a9d1e708d482cc247726b4660 OP_EQUALVERIFY OP_CHECKSIG','scriptpubkey_type':'p2pkh','scriptpubkey_address':'1MeUEVpjtUbvQhkCAEa4wUSAVmiKXZdtpZ','value':10500000},'scriptsig':'463043021f569532a51e772c887f43fb4708f7d1172614e053e01005d9d0d6d1849ec4b102201fa0b5a2a25092fe07cf728bafbff0fd0de0dd64ca332f80043bc84f556ed50b0121032f7fb9837b4af2669381f2837637d9553d61815fa8c94f509707c6ad8407a0de','scriptsig_asm':'OP_PUSHBYTES_70 3043021f569532a51e772c887f43fb4708f7d1172614e053e01005d9d0d6d1849ec4b102201fa0b5a2a25092fe07cf728bafbff0fd0de0dd64ca332f80043bc84f556ed50b01 OP_PUSHBYTES_33 032f7fb9837b4af2669381f2837637d9553d61815fa8c94f509707c6ad8407a0de','is_coinbase':false,'sequence':4294967295}],'vout':[{'scriptpubkey':'76a914d26402eddc4e3e4e056806db84d0c1d0aa64e4b788ac','scriptpubkey_asm':'OP_DUP OP_HASH160 OP_PUSHBYTES_20 d26402eddc4e3e4e056806db84d0c1d0aa64e4b7 OP_EQUALVERIFY OP_CHECKSIG','scriptpubkey_type':'p2pkh','scriptpubkey_address':'1LBSiCfqExVi4guv269zXAB4PpCjDJxa1j','value':10325},{'scriptpubkey':'76a9146edab495aa676a00212c1ee641a7820cd77cc1a088ac','scriptpubkey_asm':'OP_DUP OP_HASH160 OP_PUSHBYTES_20 6edab495aa676a00212c1ee641a7820cd77cc1a0 OP_EQUALVERIFY OP_CHECKSIG','scriptpubkey_type':'p2pkh','scriptpubkey_address':'1B79L28kgaiuytndJziEN6sDr5C7ag4XQx','value':1500000},{'scriptpubkey':'76a914c9b89b5f2cb9f71cc75500dff840e497834d129688ac','scriptpubkey_asm':'OP_DUP OP_HASH160 OP_PUSHBYTES_20 c9b89b5f2cb9f71cc75500dff840e497834d1296 OP_EQUALVERIFY OP_CHECKSIG','scriptpubkey_type':'p2pkh','scriptpubkey_address':'1KPbyGkqjmrS3gn5DW7LvG1ie5t2NYRhLk','value':8995958}],'size':553,'weight':2212,'fee':4100,'status':{'confirmed':false}}
@@ -153,9 +157,10 @@ class MockGenerator {
       randomTx = JSON.parse(JSON.stringify(randomTx));
       randomTx.size = 10000;
       randomTx.weight = 40000;
+      randomTx['vsize'] = 10000;
       // @ts-ignore
-      randomTx['_feePerVsize'] = randomTx.feePerVsize * 4;
-      randomTx.fee = randomTx.fee * 80;
+      randomTx.fee = this.getRandomNumberBetween(1000, 100000) * 80;
+      randomTx['_feePerVsize'] = randomTx.fee / 10000;
       randomTx.txid = this.getRandomTxHash();
       console.log('Creating transaction', randomTx.txid);
       delete randomTx['firstSeen'];
@@ -237,8 +242,7 @@ class MockGenerator {
   }
 
   private loadRandomTransactions(): void {
-    const transactionObjects = JSON.parse(fs.readFileSync('db/mempool.json', 'utf8')).mempool;
-    this.randomTransactions = Object.values(transactionObjects);
+    this.randomTransactions = JSON.parse(fs.readFileSync('db/cache.json', 'utf8')).mempoolArray;
   }
 
   private generateCoinbaseTransaction(block: Block): Transaction {