diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 19938ac1..e094e1fa 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -652,6 +652,8 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: 'false'
+      - name: Instal deps
+        run: make install-opencl
       - name: Install latest stable
         uses: actions-rs/toolchain@v1
         with:
@@ -831,6 +833,64 @@ jobs:
           rustup target add wasm32-unknown-unknown
           cargo test address
 
+  deserialize-test:
+    name: "Deserialize Params Tests"
+    timeout-minutes: 20
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          submodules: 'true'
+      - name: Instal deps
+        run: make install-opencl
+      - name: Install node
+        uses: actions/setup-node@v2
+        with:
+          node-version: '16.16.0'
+      - name: Install yarn
+        run: npm install -g yarn
+      - name: Install latest stable
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          override: true
+      - name: Install dependencies
+        run: |
+          yarn install
+          make install_solc_linux
+      - name: Restore crates
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('./testing/Cargo.lock') }}
+      - name: Restore previous compilation
+        uses: actions/cache@v3
+        with:
+          path: |
+            ./testing/target
+          key: ${{ runner.os }}-testing-${{ hashFiles('./testing/Cargo.lock') }}
+      - name: Restore builtin-actors
+        uses: actions/cache@v3
+        with:
+          path: |
+            ./testing/builtin-actors/target
+          key: ${{ runner.os }}-actors-${{ hashFiles('./testing/builtin-actors/Cargo.lock') }}
+      - name: Build builtin-actors
+        run: make build_builtin_actors
+      - name: Build contracts
+        run: make
+      - name: Run tests for deserialize params
+        run: |
+          cd testing
+          rustup target add wasm32-unknown-unknown
+          cargo test deserialize_params_tests
+
+
   comment-result:
     name: "Comment the result on PR"
     runs-on: ubuntu-22.04
diff --git a/Makefile b/Makefile
index 60e16866..7d7aced4 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,7 @@ build_tests: verify_solc build_leb128_test
 	./bin/solc solidity-cborutils=${PWD}/node_modules/solidity-cborutils/ @ensdomains=${PWD}/node_modules/@ensdomains/ contracts/v0.8/tests/send.test.sol --output-dir ./build/v0.8/tests --overwrite --bin --hashes --opcodes --abi
 	./bin/solc solidity-cborutils=${PWD}/node_modules/solidity-cborutils/ @ensdomains=${PWD}/node_modules/@ensdomains/ contracts/v0.8/tests/cbor.decode.test.sol --output-dir ./build/v0.8/tests --overwrite --bin --hashes --opcodes --abi
 	./bin/solc solidity-cborutils=${PWD}/node_modules/solidity-cborutils/ @ensdomains=${PWD}/node_modules/@ensdomains/ contracts/v0.8/tests/address.test.sol --output-dir ./build/v0.8/tests --overwrite --bin --hashes --opcodes --abi
+	./bin/solc solidity-cborutils=${PWD}/node_modules/solidity-cborutils/ @ensdomains=${PWD}/node_modules/@ensdomains/ contracts/v0.8/tests/deserializeparams.test.sol --output-dir ./build/v0.8/tests --overwrite --bin --hashes --opcodes --abi
 	./bin/solc @zondax/solidity-bignumber=${PWD}/node_modules/@zondax/solidity-bignumber/  solidity-cborutils=${PWD}/node_modules/solidity-cborutils/ @ensdomains=${PWD}/node_modules/@ensdomains/ contracts/v0.8/mocks/tests/market.test.sol --output-dir ./build/v0.8/mocks/tests --overwrite --bin --hashes --opcodes --abi
 	./bin/solc @zondax/solidity-bignumber=${PWD}/node_modules/@zondax/solidity-bignumber/  solidity-cborutils=${PWD}/node_modules/solidity-cborutils/ @ensdomains=${PWD}/node_modules/@ensdomains/ contracts/v0.8/mocks/tests/miner.test.sol --output-dir ./build/v0.8/mocks/tests --overwrite --bin --hashes --opcodes --abi
 
@@ -114,7 +115,7 @@ test_send_integration: build build_builtin_actors
 	cd testing && cargo test send_test -- --nocapture
 
 test_frc0042:
-	cd scripts/frc42 && cargo r
+	cd testing  && cargo run --example methodnum
 
 test_cbor_decode: build build_builtin_actors
 	cd testing && cargo test cbor_decode_test -- --nocapture
@@ -122,6 +123,9 @@ test_cbor_decode: build build_builtin_actors
 test_leb128: build build_builtin_actors
 	cd testing && cargo test leb128 -- --nocapture
 
+test_deserialize: build build_builtin_actors
+	cd testing && cargo test deserialize_params_tests -- --nocapture
+
 test_address: build build_builtin_actors
 	cd testing && cargo test address -- --nocapture
 
diff --git a/contracts/v0.8/cbor/MinerCbor.sol b/contracts/v0.8/cbor/MinerCbor.sol
index 193e9f08..9354e317 100644
--- a/contracts/v0.8/cbor/MinerCbor.sol
+++ b/contracts/v0.8/cbor/MinerCbor.sol
@@ -136,6 +136,7 @@ library MinerCBOR {
 
         uint byteIdx = 0;
         uint len;
+        uint leni;
 
         (len, byteIdx) = rawResp.readFixedArray(byteIdx);
         assert(len == 1);
@@ -144,6 +145,9 @@ library MinerCBOR {
         ret.vesting_funds = new MinerTypes.VestingFunds[](len);
 
         for (uint i = 0; i < len; i++) {
+            (leni, byteIdx) = rawResp.readFixedArray(byteIdx);
+            assert(leni == 2);
+            
             (epoch, byteIdx) = rawResp.readInt64(byteIdx);
             (tmp, byteIdx) = rawResp.readBytes(byteIdx);
 
diff --git a/contracts/v0.8/tests/deserializeparams.test.sol b/contracts/v0.8/tests/deserializeparams.test.sol
new file mode 100644
index 00000000..6e13d01e
--- /dev/null
+++ b/contracts/v0.8/tests/deserializeparams.test.sol
@@ -0,0 +1,37 @@
+/*******************************************************************************
+ *   (c) 2023 Zondax AG
+ *
+ *  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.
+ ********************************************************************************/
+//
+// DRAFT!! THIS CODE HAS NOT BEEN AUDITED - USE ONLY FOR PROTOTYPING
+
+// SPDX-License-Identifier: Apache-2.0
+pragma solidity ^0.8.17;
+
+import "../types/MinerTypes.sol";
+import "../cbor/MinerCbor.sol";
+
+/// @notice This file is meant to serve as a deployable contract to test 
+/// @author Zondax AG
+contract DeserializeParamsTest {
+    using MinerCBOR for *;
+
+    function deserializeGetVestingFundsReturn() public pure {
+        bytes memory params = hex"8181820040";
+
+        MinerTypes.GetVestingFundsReturn memory result = params.deserializeGetVestingFundsReturn();
+
+        require(result.vesting_funds.length == 1, "result length should be 1");
+    }
+}
\ No newline at end of file
diff --git a/scripts/frc42/Cargo.lock b/scripts/frc42/Cargo.lock
deleted file mode 100644
index 840806e9..00000000
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diff --git a/scripts/frc42/Cargo.toml b/scripts/frc42/Cargo.toml
deleted file mode 100644
index fa7c4140..00000000
--- a/scripts/frc42/Cargo.toml
+++ /dev/null
@@ -1,9 +0,0 @@
-[package]
-name = "script"
-version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-frc42_dispatch = { git = "https://github.com/filecoin-project/filecoin-actor-utils", branch = "feat/fvm-m2" }
diff --git a/scripts/leb128/generate.py b/scripts/generate.py
similarity index 100%
rename from scripts/leb128/generate.py
rename to scripts/generate.py
diff --git a/scripts/leb128/u_case.txt b/scripts/u_case.txt
similarity index 100%
rename from scripts/leb128/u_case.txt
rename to scripts/u_case.txt
diff --git a/scripts/frc42/src/main.rs b/testing/examples/methodnum.rs
similarity index 95%
rename from scripts/frc42/src/main.rs
rename to testing/examples/methodnum.rs
index dc0dd97d..c7e7f61b 100644
--- a/scripts/frc42/src/main.rs
+++ b/testing/examples/methodnum.rs
@@ -1,5 +1,12 @@
 use std::fs;
 
+    /*****************************************
+     *
+     *  This file is used only to generate and
+     *  compare the method num using FRC42
+     *
+     *****************************************/
+
 fn main() {
 
     /*********************************
@@ -55,7 +62,7 @@ fn main() {
     println!("GetDealActivationExported {}", GetDealActivationExported);
 
     // Verify we have the right one
-    let file = fs::read_to_string("../../contracts/v0.8/types/MarketTypes.sol").unwrap();
+    let file = fs::read_to_string("../contracts/v0.8/types/MarketTypes.sol").unwrap();
 
     'method: for (method, method_num ) in method_nums {
         for line in file.lines() {
@@ -148,7 +155,7 @@ fn main() {
     println!("GetMultiaddrsExported {}", GetMultiaddrsExported);
 
     // Verify we have the right ones
-    let file = fs::read_to_string("../../contracts/v0.8/types/MinerTypes.sol").unwrap();
+    let file = fs::read_to_string("../contracts/v0.8/types/MinerTypes.sol").unwrap();
 
     'method: for (method, method_num ) in method_nums {
         for line in file.lines() {
@@ -195,7 +202,7 @@ fn main() {
     println!("MinerConsensusCountExported {}", MinerConsensusCountExported);
 
     // Verify we have the right ones
-    let file = fs::read_to_string("../../contracts/v0.8/types/PowerTypes.sol").unwrap();
+    let file = fs::read_to_string("../contracts/v0.8/types/PowerTypes.sol").unwrap();
 
     'method: for (method, method_num ) in method_nums {
         for line in file.lines() {
@@ -242,7 +249,7 @@ fn main() {
     println!("RemoveExpiredClaimsExported {}", RemoveExpiredClaimsExported);
 
     // Verify we have the right ones
-    let file = fs::read_to_string("../../contracts/v0.8/types/VerifRegTypes.sol").unwrap();
+    let file = fs::read_to_string("../contracts/v0.8/types/VerifRegTypes.sol").unwrap();
 
     'method: for (method, method_num ) in method_nums {
         for line in file.lines() {
@@ -317,7 +324,7 @@ fn main() {
     println!("AllowanceExported {}", AllowanceExported);
 
     // Verify we have the right ones
-    let file = fs::read_to_string("../../contracts/v0.8/types/DataCapTypes.sol").unwrap();
+    let file = fs::read_to_string("../contracts/v0.8/types/DataCapTypes.sol").unwrap();
 
     'method: for (method, method_num ) in method_nums {
         for line in file.lines() {
@@ -348,7 +355,7 @@ fn main() {
     println!("ExecExported {}", ExecExported);
 
     // Verify we have the right ones
-    let file = fs::read_to_string("../../contracts/v0.8/types/InitTypes.sol").unwrap();
+    let file = fs::read_to_string("../contracts/v0.8/types/InitTypes.sol").unwrap();
 
     'method: for (method, method_num ) in method_nums {
         for line in file.lines() {
@@ -379,7 +386,7 @@ fn main() {
     println!("AuthenticateMessageExported {}", AuthenticateMessageExported);
 
     // Verify we have the right ones
-    let file = fs::read_to_string("../../contracts/v0.8/types/AccountTypes.sol").unwrap();
+    let file = fs::read_to_string("../contracts/v0.8/types/AccountTypes.sol").unwrap();
 
     'method: for (method, method_num ) in method_nums {
         for line in file.lines() {
@@ -401,16 +408,16 @@ fn main() {
 
      println!("COMMON EXPORTED METHOD NUM");
      let mut method_nums: Vec<(String, u64)> = vec![];
-
+ 
      let UniversalReceiverHook = frc42_dispatch::method_hash!("Receive");
      method_nums.push(("UniversalReceiverHookMethodNum".to_string(), UniversalReceiverHook));
-
-
+ 
+ 
      println!("UniversalReceiverHookMethodNum {}", UniversalReceiverHook);
-
+ 
      // Verify we have the right ones
-     let file = fs::read_to_string("../../contracts/v0.8/types/CommonTypes.sol").unwrap();
-
+     let file = fs::read_to_string("../contracts/v0.8/types/CommonTypes.sol").unwrap();
+ 
      'method: for (method, method_num ) in method_nums {
          for line in file.lines() {
              if line.contains(&format!(" {} ",method)) {
diff --git a/testing/examples/serializeParams.rs b/testing/examples/serializeParams.rs
new file mode 100644
index 00000000..6d619697
--- /dev/null
+++ b/testing/examples/serializeParams.rs
@@ -0,0 +1,14 @@
+use fil_actor_miner::GetVestingFundsReturn;
+use fvm_shared::clock::ChainEpoch;
+use fvm_shared::econ::TokenAmount;
+use fvm_ipld_encoding::to_vec;
+
+fn main() {
+
+    let vf = GetVestingFundsReturn {
+        vesting_funds: vec![(ChainEpoch::default(), TokenAmount::default())]
+    };
+
+    println!("{}", hex::encode(to_vec(&vf).unwrap()))
+
+}
\ No newline at end of file
diff --git a/testing/tests/deserializeParams.rs b/testing/tests/deserializeParams.rs
new file mode 100644
index 00000000..f0b1c1e6
--- /dev/null
+++ b/testing/tests/deserializeParams.rs
@@ -0,0 +1,77 @@
+use fil_actor_eam::Return;
+use fil_actor_evm::Method as EvmMethods;
+use fil_actors_runtime::EAM_ACTOR_ADDR;
+use fvm::executor::{ApplyKind, Executor};
+use fvm_integration_tests::dummy::DummyExterns;
+use fvm_integration_tests::tester::Account;
+use fvm_ipld_encoding::strict_bytes;
+use fvm_ipld_encoding::RawBytes;
+use fvm_shared::address::Address;
+use fvm_shared::message::Message;
+use serde::{Deserialize as SerdeDeserialize, Serialize as SerdeSerialize};
+
+use testing::setup;
+
+const WASM_COMPILED_PATH: &str = "../build/v0.8/tests/DeserializeParamsTest.bin";
+
+#[derive(SerdeSerialize, SerdeDeserialize)]
+#[serde(transparent)]
+pub struct CreateExternalParams(#[serde(with = "strict_bytes")] pub Vec<u8>);
+
+#[test]
+fn deserialize_params_tests() {
+    println!("Testing solidity API");
+
+    let (mut tester, _manifest) = setup::setup_tester();
+
+    let sender: [Account; 1] = tester.create_accounts().unwrap();
+
+    // Instantiate machine
+    tester.instantiate_machine(DummyExterns).unwrap();
+
+    let executor = tester.executor.as_mut().unwrap();
+
+    println!("Calling init actor (EVM)");
+
+    let evm_bin = setup::load_evm(WASM_COMPILED_PATH);
+
+    let constructor_params = CreateExternalParams(evm_bin);
+
+    let message = Message {
+        from: sender[0].1,
+        to: EAM_ACTOR_ADDR,
+        gas_limit: 1000000000,
+        method_num: 4,
+        sequence: 0,
+        params: RawBytes::serialize(constructor_params).unwrap(),
+        ..Message::default()
+    };
+
+    let res = executor
+        .execute_message(message, ApplyKind::Explicit, 100)
+        .unwrap();
+
+    assert_eq!(res.msg_receipt.exit_code.value(), 0);
+
+    let exec_return: Return = RawBytes::deserialize(&res.msg_receipt.return_data).unwrap();
+
+    let contract_actor_id = exec_return.actor_id;
+
+    println!("Calling `deserializeGetVestingFundsReturn`");
+
+    let message = Message {
+            from: sender[0].1,
+            to: Address::new_id(contract_actor_id),
+            gas_limit: 1000000000,
+            method_num: EvmMethods::InvokeContract as u64,
+            sequence: 1,
+            params: RawBytes::new(hex::decode("4407854007").unwrap()),
+            ..Message::default()
+        };
+
+    let res = executor
+        .execute_message(message, ApplyKind::Explicit, 100)
+        .unwrap();
+
+    assert_eq!(res.msg_receipt.exit_code.value(), 0);
+}
\ No newline at end of file