feat: add support for paying with ERC20 or AssetId for services (#845)

* chore: update flakes

* feat: add payment assets

* feat: ERC20 and AssetId support

* chore: update onRequestHook

* feat: add Mock ERC20 for testing

* feat: test using other assets

* feat: using ERC20 and Assets works on Both EVM and Substrate

* feat: add custom error messages for the precompile

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_style = tab
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[.github/workflows/*.{yaml,yml}]
+indent_size = 2

flake.nix

@@ -6,9 +6,7 @@
     # Rust
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
-      inputs = {
-        nixpkgs.follows = "nixpkgs";
-      };
+      inputs = { nixpkgs.follows = "nixpkgs"; };
     };
     # EVM dev tools
     foundry = {
@@ -24,13 +22,10 @@
     flake-utils.lib.eachDefaultSystem (system:
       let
         overlays = [ (import rust-overlay) foundry.overlay ];
-        pkgs = import nixpkgs {
-          inherit system overlays;
-        };
+        pkgs = import nixpkgs { inherit system overlays; };
         lib = pkgs.lib;
         toolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
-      in
-      {
+      in {
         devShells.default = pkgs.mkShell {
           name = "tangle";
           nativeBuildInputs = [
@@ -44,8 +39,10 @@
             pkgs.rustPlatform.bindgenHook
             # Mold Linker for faster builds (only on Linux)
             (lib.optionals pkgs.stdenv.isLinux pkgs.mold)
-            (lib.optionals pkgs.stdenv.isDarwin pkgs.darwin.apple_sdk.frameworks.Security)
-            (lib.optionals pkgs.stdenv.isDarwin pkgs.darwin.apple_sdk.frameworks.SystemConfiguration)
+            (lib.optionals pkgs.stdenv.isDarwin
+              pkgs.darwin.apple_sdk.frameworks.Security)
+            (lib.optionals pkgs.stdenv.isDarwin
+              pkgs.darwin.apple_sdk.frameworks.SystemConfiguration)
           ];
           buildInputs = [
             # Nodejs for test suite
@@ -56,15 +53,17 @@
             toolchain
             pkgs.foundry-bin
           ];
-          packages = [
-            pkgs.taplo
-            pkgs.cargo-nextest
-            pkgs.cargo-tarpaulin
-          ];
+          packages =
+            [ pkgs.taplo pkgs.harper pkgs.cargo-nextest pkgs.cargo-tarpaulin ];
           # Environment variables
           RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";
           # Needed for running DKG Node.
-          LD_LIBRARY_PATH = lib.makeLibraryPath [ pkgs.gmp pkgs.openssl pkgs.libclang pkgs.stdenv.cc.cc ];
+          LD_LIBRARY_PATH = lib.makeLibraryPath [
+            pkgs.gmp
+            pkgs.openssl
+            pkgs.libclang
+            pkgs.stdenv.cc.cc
+          ];
         };
       });
 }

pallets/services/Cargo.toml

@@ -32,6 +32,7 @@ hex = { workspace = true }
 num_enum = { workspace = true }
 hex-literal = { workspace = true }
 libsecp256k1 = { workspace = true }
+pallet-assets = { workspace = true }
 pallet-balances = { workspace = true }
 pallet-timestamp = { workspace = true }
 serde = { workspace = true }
@@ -103,6 +104,7 @@ std = [
  "pallet-ethereum/std",
  "pallet-evm/std",
  "pallet-evm-chain-id/std",
+ "pallet-assets/std",
 
  "pallet-evm-precompile-modexp/std",
  "pallet-evm-precompile-sha3fips/std",