Experiment: use Canpack in place of Rust canister

Cargo.toml

@@ -4,4 +4,4 @@ opt-level = "s"
 
 [workspace]
 resolver = "2"
-members = ["canisters/ic_eth"]
+members = [".canpack/motoko_rust"]

README.md

@@ -62,6 +62,7 @@ Here is one way to acquire tokens and NFTs on the [Sepolia](https://www.alchemy.
 - [Motoko](https://github.com/dfinity/motoko#readme): a safe and simple programming language for the Internet Computer
 - [Mops](https://mops.one): an on-chain community package manager for Motoko
 - [mo-dev](https://github.com/dfinity/motoko-dev-server#readme): a live reload development server for Motoko
+- [Canpack](https://github.com/rvanasa/canpack#readme): call Rust functions from Motoko using a generated canister
 
 **Ethereum Integration:**
 - [Rust](https://www.rust-lang.org/): a secure, high-performance canister programming language

canisters/backend/Core.mo → backend/Core.mo

@@ -7,7 +7,7 @@ import Principal "mo:base/Principal";
 import Nat64 "mo:base/Nat64";
 import System "lib/System";
 import Iter "lib/IterMore";
-import IcEth "canister:ic_eth";
+import Rust "canister:motoko_rust";
 import Seq "mo:sequence/Sequence";
 import Stream "mo:sequence/Stream";
 
@@ -39,7 +39,7 @@ module {
 
     public func connectEthWallet(caller : Principal, wallet : Types.EthWallet, signedPrincipal : Types.SignedPrincipal) : async Types.Resp.ConnectEthWallet {
       let log = logger.Begin(caller, #connectEthWallet(wallet, signedPrincipal));
-      let checkOutcome = await IcEth.verify_ecdsa(wallet, Principal.toText caller, signedPrincipal);
+      let checkOutcome = await Rust.ecdsa_verify(wallet, Principal.toText caller, signedPrincipal);
       log.internal(#verifyEcdsaOutcome(checkOutcome));
       if (checkOutcome) {
         ignore (state.putWalletSignsPrincipal(wallet, caller, signedPrincipal));
@@ -58,11 +58,11 @@ module {
         case (?_) {
           switch (nft.tokenType) {
             case (#erc721) {
-              let owner = await IcEth.erc721_owner_of(nft.network, nft.contract, Nat64.fromNat(nft.tokenId));
+              let owner = await Rust.erc721_owner_of(nft.network, nft.contract, Nat64.fromNat(nft.tokenId));
               owner == nft.owner;
             };
             case (#erc1155) {
-              let balance = await IcEth.erc1155_balance_of(nft.network, nft.contract, nft.owner, Nat64.fromNat(nft.tokenId));
+              let balance = await Rust.erc1155_balance_of(nft.network, nft.contract, nft.owner, Nat64.fromNat(nft.tokenId));
               balance > 0;
             };
           };

canister_ids.json

@@ -5,7 +5,7 @@
   "frontend": {
     "ic": "xm3ir-rqaaa-aaaap-abhqq-cai"
   },
-  "ic_eth": {
+  "motoko_rust": {
     "ic": "xfydn-hyaaa-aaaap-abhra-cai"
   }
 }