diff --git a/.github/actions/install_rust/action.yml b/.github/actions/install_rust/action.yml
new file mode 100644
index 00000000000..f9b3a28488e
--- /dev/null
+++ b/.github/actions/install_rust/action.yml
@@ -0,0 +1,24 @@
+# Installs rust toolchain. In order to set/fix the version, edit lines 15 & 22.
+inputs:
+  components:
+    description: "An optional parameter that will be sent to dtolnay/rust-toolchain."
+    required: false
+    type: string
+
+runs:
+  using: "composite"
+  steps:
+    - name: fix version
+      run: echo "RUST_VERSION=stable" >> $GITHUB_ENV
+    - name: install rust toolchain with given components
+      if: "${{ inputs.components != '' }}"
+      uses: dtolnay/rust-toolchain@master
+      with:
+        toolchain: ${{ env.RUST_VERSION }}
+        components: ${{ inputs.components }}
+
+    - name: install rust toolchain without given components
+      if: "${{ inputs.components == '' }}"
+      uses: dtolnay/rust-toolchain@master
+      with:
+        toolchain: ${{ env.RUST_VERSION }}
diff --git a/.github/workflows/blockifier_ci.yml b/.github/workflows/blockifier_ci.yml
index 3cf49f006f7..46197b8e02b 100644
--- a/.github/workflows/blockifier_ci.yml
+++ b/.github/workflows/blockifier_ci.yml
@@ -30,7 +30,7 @@ jobs:
     runs-on: starkware-ubuntu-20-04-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: "v0-rust-ubuntu-20.04"
@@ -41,7 +41,7 @@ jobs:
     runs-on: starkware-ubuntu-20-04-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
 
       - uses: Swatinem/rust-cache@v2
         with:
diff --git a/.github/workflows/blockifier_compiled_cairo.yml b/.github/workflows/blockifier_compiled_cairo.yml
index e2eed9636fd..878623b6415 100644
--- a/.github/workflows/blockifier_compiled_cairo.yml
+++ b/.github/workflows/blockifier_compiled_cairo.yml
@@ -23,8 +23,7 @@ jobs:
     runs-on: starkware-ubuntu-20-04-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Noelware/setup-protoc@1.1.0
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: "v0-rust-ubuntu-20.04"
@@ -41,4 +40,4 @@ jobs:
 
       - run:
           pip install -r crates/blockifier/tests/requirements.txt;
-          cargo test verify_feature_contracts -- --include-ignored
+          cargo test -p blockifier --test feature_contracts_compatibility_test --features testing -- --include-ignored
diff --git a/.github/workflows/blockifier_coverage.yml b/.github/workflows/blockifier_coverage.yml
index 1da1cdbbf24..23cfb58bed7 100644
--- a/.github/workflows/blockifier_coverage.yml
+++ b/.github/workflows/blockifier_coverage.yml
@@ -17,7 +17,7 @@ jobs:
       CARGO_TERM_COLOR: always
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: "v0-rust-ubuntu-20.04"
diff --git a/.github/workflows/blockifier_post-merge.yml b/.github/workflows/blockifier_post-merge.yml
index 404ed096809..4015aab9211 100644
--- a/.github/workflows/blockifier_post-merge.yml
+++ b/.github/workflows/blockifier_post-merge.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: starkware-ubuntu-20-04-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Noelware/setup-protoc@1.1.0
       - uses: Swatinem/rust-cache@v2
         with:
diff --git a/.github/workflows/committer_ci.yml b/.github/workflows/committer_ci.yml
index d4aadf2ce4d..b60f83bed2c 100644
--- a/.github/workflows/committer_ci.yml
+++ b/.github/workflows/committer_ci.yml
@@ -33,7 +33,7 @@ jobs:
     runs-on: starkware-ubuntu-latest-small
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
 
       - id: auth
@@ -115,7 +115,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
 
         # Commit hash on pull request event would be the head commit of the branch.
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ec8673ed032..9dda3304a1f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -44,7 +44,7 @@ jobs:
     runs-on: starkware-ubuntu-20-04-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
+      - uses: dtolnay/rust-toolchain@master # TODO(Nimrod, 15/8/2024): Use stable toolchain.
         with:
           components: rustfmt
           toolchain: nightly-2024-04-29
@@ -58,7 +58,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: Noelware/setup-protoc@1.1.0
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
         with:
           components: clippy
       - uses: Swatinem/rust-cache@v2
@@ -83,7 +83,7 @@ jobs:
     #   RUSTDOCFLAGS: "-D warnings"
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - uses: Noelware/setup-protoc@1.1.0
         with:
@@ -97,7 +97,7 @@ jobs:
         with:
           # Fetch the entire history.
           fetch-depth: 0
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Noelware/setup-protoc@1.1.0
       - uses: Swatinem/rust-cache@v2
         with:
@@ -137,7 +137,7 @@ jobs:
     runs-on: starkware-ubuntu-latest-small
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - uses: baptiste0928/cargo-install@v3
         with:
@@ -159,7 +159,7 @@ jobs:
       RUSTDOCFLAGS: "-D warnings"
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - uses: Noelware/setup-protoc@1.1.0
         with:
diff --git a/.github/workflows/papyrus_ci.yml b/.github/workflows/papyrus_ci.yml
index 3fb238c381a..3ec82a072ad 100644
--- a/.github/workflows/papyrus_ci.yml
+++ b/.github/workflows/papyrus_ci.yml
@@ -41,7 +41,7 @@ jobs:
     runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - uses: Noelware/setup-protoc@1.1.0
         with:
@@ -60,7 +60,7 @@ jobs:
     runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - uses: Noelware/setup-protoc@1.1.0
         with:
@@ -79,7 +79,7 @@ jobs:
     runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - uses: Noelware/setup-protoc@1.1.0
         with:
@@ -96,7 +96,7 @@ jobs:
     runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - uses: Noelware/setup-protoc@1.1.0
 
@@ -109,7 +109,7 @@ jobs:
     runs-on: starkware-ubuntu-latest-medium
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - name: Set-Up
         run: |
           sudo apt-get update
@@ -173,7 +173,7 @@ jobs:
           filters: |
             target_directory:
               - 'crates/papyrus_storage/src/db/**'
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       # repeat this job 32 times. this is a random test for part of the code that may cause a corrupted database.
       - run: for run in {1..32}; do cargo test -r -p papyrus_storage -- --include-ignored common_prefix_compare_with_simple_table_random; done
diff --git a/.github/workflows/papyrus_nightly-tests-call.yml b/.github/workflows/papyrus_nightly-tests-call.yml
index afdc528be0e..64980b6ab56 100644
--- a/.github/workflows/papyrus_nightly-tests-call.yml
+++ b/.github/workflows/papyrus_nightly-tests-call.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ${{ inputs.os }}
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - run: sudo apt update; sudo apt -y install libclang-dev
         # Install libclang-dev that is not a part of the ubuntu vm in github actions.
diff --git a/.github/workflows/papyrus_nightly-tests.yml b/.github/workflows/papyrus_nightly-tests.yml
index 9c0a9bb09f8..a7a91d5687d 100644
--- a/.github/workflows/papyrus_nightly-tests.yml
+++ b/.github/workflows/papyrus_nightly-tests.yml
@@ -37,7 +37,7 @@ jobs:
     if: github.event.schedule == '30 0 * * *'
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
 
       - run: mkdir data
@@ -57,7 +57,7 @@ jobs:
     if: github.event.schedule == '30 0 * * *'
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - run: npm install -g ganache@7.4.3
 
@@ -73,7 +73,7 @@ jobs:
     if: github.event.schedule == '30 0 * * *'
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - run: cargo build -r -p papyrus_load_test
 
@@ -82,7 +82,7 @@ jobs:
     if: github.event.schedule == '30 0 * * *'
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - run: >
           cargo test -r
@@ -98,6 +98,6 @@ jobs:
     runs-on: starkware-ubuntu-latest-small
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - uses: Swatinem/rust-cache@v2
       - run: for run in {1..100}; do cargo test -r -p papyrus_storage -- --include-ignored common_prefix_compare_with_simple_table_random; done
diff --git a/.github/workflows/verify-deps.yml b/.github/workflows/verify-deps.yml
index 3b410ef14cf..e23ac294966 100644
--- a/.github/workflows/verify-deps.yml
+++ b/.github/workflows/verify-deps.yml
@@ -11,7 +11,7 @@ jobs:
     continue-on-error: true
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/install_rust
       - name: Update Dependencies
         run: cargo update --verbose
       - name: Build