diff --git a/canisters/management/ic.did b/canisters/management/ic.did
new file mode 100644
index 0000000000..88cd70dca8
--- /dev/null
+++ b/canisters/management/ic.did
@@ -0,0 +1,261 @@
+// Taken from: https://github.com/dfinity/interface-spec/blob/d04e0dd12956d7b7f52ea01e1bba24479deffa00/spec/_attachments/ic.did
+
+// Copyright 2021 DFINITY Foundation
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// 
+//     http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+type canister_id = principal;
+type wasm_module = blob;
+
+type canister_settings = record {
+  controllers : opt vec principal;
+  compute_allocation : opt nat;
+  memory_allocation : opt nat;
+  freezing_threshold : opt nat;
+  reserved_cycles_limit : opt nat;
+};
+
+type definite_canister_settings = record {
+  controllers : vec principal;
+  compute_allocation : nat;
+  memory_allocation : nat;
+  freezing_threshold : nat;
+  reserved_cycles_limit : nat;
+};
+
+type change_origin = variant {
+  from_user : record {
+    user_id : principal;
+  };
+  from_canister : record {
+    canister_id : principal;
+    canister_version : opt nat64;
+  };
+};
+
+type change_details = variant {
+  creation : record {
+    controllers : vec principal;
+  };
+  code_uninstall;
+  code_deployment : record {
+    mode : variant {install; reinstall; upgrade};
+    module_hash : blob;
+  };
+  controllers_change : record {
+    controllers : vec principal;
+  };
+};
+
+type change = record {
+  timestamp_nanos : nat64;
+  canister_version : nat64;
+  origin : change_origin;
+  details : change_details;
+};
+
+type chunk_hash = blob;
+
+type http_header = record { name: text; value: text };
+
+type http_response = record {
+  status: nat;
+  headers: vec http_header;
+  body: blob;
+};
+
+type ecdsa_curve = variant { secp256k1; };
+
+type satoshi = nat64;
+
+type bitcoin_network = variant {
+  mainnet;
+  testnet;
+};
+
+type bitcoin_address = text;
+
+type block_hash = blob;
+
+type outpoint = record {
+  txid : blob;
+  vout : nat32
+};
+
+type utxo = record {
+  outpoint: outpoint;
+  value: satoshi;
+  height: nat32;
+};
+
+type get_utxos_request = record {
+  address : bitcoin_address;
+  network: bitcoin_network;
+  filter: opt variant {
+    min_confirmations: nat32;
+    page: blob;
+  };
+};
+
+type get_current_fee_percentiles_request = record {
+  network: bitcoin_network;
+};
+
+type get_utxos_response = record {
+  utxos: vec utxo;
+  tip_block_hash: block_hash;
+  tip_height: nat32;
+  next_page: opt blob;
+};
+
+type get_balance_request = record {
+  address : bitcoin_address;
+  network: bitcoin_network;
+  min_confirmations: opt nat32;
+};
+
+type send_transaction_request = record {
+  transaction: blob;
+  network: bitcoin_network;
+};
+
+type millisatoshi_per_byte = nat64;
+
+type node_metrics = record {
+    node_id : principal;
+    num_blocks_total : nat64;
+    num_block_failures_total : nat64;
+};
+
+service ic : {
+  create_canister : (record {
+    settings : opt canister_settings;
+    sender_canister_version : opt nat64;
+  }) -> (record {canister_id : canister_id});
+  update_settings : (record {
+    canister_id : principal;
+    settings : canister_settings;
+    sender_canister_version : opt nat64;
+  }) -> ();
+  upload_chunk : (record {
+    canister_id : principal;
+    chunk : blob;
+  }) -> (chunk_hash);
+  clear_chunk_store: (record {canister_id : canister_id}) -> ();
+  stored_chunks: (record {canister_id : canister_id}) -> (vec chunk_hash);
+  install_code : (record {
+    mode : variant {
+      install;
+      reinstall;
+      upgrade : opt record {
+        skip_pre_upgrade: opt bool;
+      }
+    };
+    canister_id : canister_id;
+    wasm_module : wasm_module;
+    arg : blob;
+    sender_canister_version : opt nat64;
+  }) -> ();
+  install_chunked_code: (record {
+    mode : variant {
+      install;
+      reinstall;
+      upgrade : opt record {
+        skip_pre_upgrade: opt bool;
+      };
+    };
+    target_canister: canister_id;
+    storage_canister: opt canister_id;
+    chunk_hashes_list: vec chunk_hash;
+    wasm_module_hash: blob;
+    arg : blob;
+    sender_canister_version : opt nat64;
+  }) -> ();
+  uninstall_code : (record {
+    canister_id : canister_id;
+    sender_canister_version : opt nat64;
+  }) -> ();
+  start_canister : (record {canister_id : canister_id}) -> ();
+  stop_canister : (record {canister_id : canister_id}) -> ();
+  canister_status : (record {canister_id : canister_id}) -> (record {
+      status : variant { running; stopping; stopped };
+      settings: definite_canister_settings;
+      module_hash: opt blob;
+      memory_size: nat;
+      cycles: nat;
+      reserved_cycles: nat;
+      idle_cycles_burned_per_day: nat;
+  });
+  canister_info : (record {
+      canister_id : canister_id;
+      num_requested_changes : opt nat64;
+  }) -> (record {
+      total_num_changes : nat64;
+      recent_changes : vec change;
+      module_hash : opt blob;
+      controllers : vec principal;
+  });
+  delete_canister : (record {canister_id : canister_id}) -> ();
+  deposit_cycles : (record {canister_id : canister_id}) -> ();
+  raw_rand : () -> (blob);
+  http_request : (record {
+    url : text;
+    max_response_bytes: opt nat64;
+    method : variant { get; head; post };
+    headers: vec http_header;
+    body : opt blob;
+    transform : opt record {
+      function : func (record {response : http_response; context : blob}) -> (http_response) query;
+      context : blob
+    };
+  }) -> (http_response);
+
+  // Threshold ECDSA signature
+  ecdsa_public_key : (record {
+    canister_id : opt canister_id;
+    derivation_path : vec blob;
+    key_id : record { curve: ecdsa_curve; name: text };
+  }) -> (record { public_key : blob; chain_code : blob; });
+  sign_with_ecdsa : (record {
+    message_hash : blob;
+    derivation_path : vec blob;
+    key_id : record { curve: ecdsa_curve; name: text };
+  }) -> (record { signature : blob });
+
+  // bitcoin interface
+  bitcoin_get_balance: (get_balance_request) -> (satoshi);
+  bitcoin_get_balance_query: (get_balance_request) -> (satoshi) query;
+  bitcoin_get_utxos: (get_utxos_request) -> (get_utxos_response);
+  bitcoin_get_utxos_query: (get_utxos_request) -> (get_utxos_response) query;
+  bitcoin_send_transaction: (send_transaction_request) -> ();
+  bitcoin_get_current_fee_percentiles: (get_current_fee_percentiles_request) -> (vec millisatoshi_per_byte);
+
+  // metrics interface
+  node_metrics_history : (record {
+    subnet_id : principal;
+    start_at_timestamp_nanos: nat64;
+  }) -> (vec record {
+    timestamp_nanos : nat64;
+    node_metrics : vec node_metrics;
+  });
+
+  // provisional interfaces for the pre-ledger world
+  provisional_create_canister_with_cycles : (record {
+    amount: opt nat;
+    settings : opt canister_settings;
+    specified_id: opt canister_id;
+    sender_canister_version : opt nat64;
+  }) -> (record {canister_id : canister_id});
+  provisional_top_up_canister :
+    (record { canister_id: canister_id; amount: nat }) -> ();
+}
diff --git a/examples/async_await/dfx.json b/examples/async_await/dfx.json
index 746935f939..3c5052b091 100644
--- a/examples/async_await/dfx.json
+++ b/examples/async_await/dfx.json
@@ -10,7 +10,8 @@
             "declarations": {
                 "output": "test/dfx_generated/async_await",
                 "node_compatibility": true
-            }
+            },
+            "env": ["AZLE_TEST_FETCH"]
         }
     }
 }
diff --git a/examples/async_await/src/async_await.ts b/examples/async_await/src/async_await.ts
index 741af4584c..3b5f48e6cb 100644
--- a/examples/async_await/src/async_await.ts
+++ b/examples/async_await/src/async_await.ts
@@ -1,9 +1,20 @@
-import { blob, Canister, ic, update, Void } from 'azle';
+import { blob, Canister, ic, serialize, update, Void } from 'azle';
 import { managementCanister } from 'azle/canisters/management';
 
 export default Canister({
     getRandomnessDirectly: update([], blob, async () => {
-        return await ic.call(managementCanister.raw_rand);
+        if (process.env.AZLE_TEST_FETCH === 'true') {
+            const response = await fetch(`icp://aaaaa-aa/raw_rand`, {
+                body: serialize({
+                    candidPath: '/canisters/management/ic.did'
+                })
+            });
+            const responseJson = await response.json();
+
+            return responseJson;
+        } else {
+            return await ic.call(managementCanister.raw_rand);
+        }
     }),
     getRandomnessIndirectly: update([], blob, async () => {
         return await getRandomness();
@@ -20,7 +31,15 @@ export default Canister({
         ]);
     }),
     returnPromiseVoid: update([], Void, async () => {
-        await ic.call(managementCanister.raw_rand);
+        if (process.env.AZLE_TEST_FETCH === 'true') {
+            await fetch(`icp://aaaaa-aa/raw_rand`, {
+                body: serialize({
+                    candidPath: '/canisters/management/ic.did'
+                })
+            });
+        } else {
+            await ic.call(managementCanister.raw_rand);
+        }
     })
 });
 
@@ -37,5 +56,16 @@ async function getRandomnessLevel2(): Promise<blob> {
 }
 
 async function getRandomness(): Promise<blob> {
-    return await ic.call(managementCanister.raw_rand);
+    if (process.env.AZLE_TEST_FETCH === 'true') {
+        const response = await fetch(`icp://aaaaa-aa/raw_rand`, {
+            body: serialize({
+                candidPath: '/canisters/management/ic.did'
+            })
+        });
+        const responseJson = await response.json();
+
+        return responseJson;
+    } else {
+        return await ic.call(managementCanister.raw_rand);
+    }
 }
diff --git a/src/compiler/utils/get_canister_config.ts b/src/compiler/utils/get_canister_config.ts
index bda03dbfcc..12ac9c7137 100644
--- a/src/compiler/utils/get_canister_config.ts
+++ b/src/compiler/utils/get_canister_config.ts
@@ -1,4 +1,5 @@
 import { existsSync, readFileSync } from 'fs';
+import { join } from 'path';
 
 import { red, yellow, green, blue, purple } from './colors';
 import { Err, Ok, Result } from './result';
@@ -46,7 +47,17 @@ export function getCanisterConfig(
         });
     }
 
-    return Ok(canisterConfig);
+    if (require.main?.path === undefined) {
+        throw new Error(`require.main?.path must be defined`);
+    }
+
+    return Ok({
+        ...canisterConfig,
+        assets: [
+            ...(canisterConfig.assets ?? []),
+            join(require.main?.path, 'canisters')
+        ]
+    });
 }
 
 function colorFormattedDfxJsonExample(canisterName: string): string {
diff --git a/src/lib/fetch.ts b/src/lib/fetch.ts
index 84437192e4..f5451446d8 100644
--- a/src/lib/fetch.ts
+++ b/src/lib/fetch.ts
@@ -46,7 +46,9 @@ export async function azleFetch(input: any, init?: any): Promise<any> {
                 ([funcName]: [string, IDL.Type]) => funcName === canisterMethod
             );
 
-            const argsRaw = new Uint8Array(IDL.encode(funcIdl.argTypes, args));
+            const argsRaw = new Uint8Array(
+                IDL.encode(funcIdl.argTypes, args ?? [])
+            );
 
             const result = await ic.callRaw(
                 Principal.fromText(canisterId),