chore: update rust to 1.79.0 and add rust-toolchain file (ethereum#1325)

* chore: update rust version to 1.79.0

* chore: fix clippy warnings

* chore: add rust-toolchain file

.circleci/config.yml

@@ -52,7 +52,7 @@ executors:
     environment:
       IMAGE_NAME: portalnetwork/trin
     docker:
-      - image: cimg/rust:1.76.0
+      - image: cimg/rust:1.79.0
   docker-nightly:
     docker:
       - image: rustlang/rust:nightly
@@ -143,7 +143,7 @@ jobs:
           command: apt install -y clang
       - run:
           name: Install rustfmt
-          command: rustup component add rustfmt     
+          command: rustup component add --toolchain nightly rustfmt
       - run:
           name: Run rustfmt
           command: cargo +nightly fmt --all -- --check
@@ -153,7 +153,7 @@ jobs:
     resource_class: xlarge
     executor:
       name: rust/default
-      tag: 1.76.0
+      tag: 1.79.0
     environment:
       RUSTFLAGS: "-D warnings"
       RUST_LOG: "debug"
@@ -174,7 +174,7 @@ jobs:
     resource_class: xlarge
     executor:
       name: rust/default
-      tag: 1.76.0
+      tag: 1.79.0
     environment:
       RUSTFLAGS: "-D warnings"
       RUST_LOG: "debug"
@@ -211,7 +211,7 @@ jobs:
     resource_class: 2xlarge
     executor:
       name: rust/default
-      tag: 1.76.0
+      tag: 1.79.0
     environment:
       RUSTFLAGS: "-D warnings"
       RUST_LOG: "debug"