Remove interface version 7 support

Author: chipshort

.circleci/config.yml

@@ -391,15 +391,15 @@ jobs:
       - run:
           name: Build with all features
           working_directory: ~/project/packages/vm
-          command: cargo build --locked --features allow_interface_version_7,iterator,staking,stargate
+          command: cargo build --locked --features iterator,staking,stargate
       - run:
           name: Test
           working_directory: ~/project/packages/vm
           command: cargo test --locked
       - run:
           name: Test with all features
           working_directory: ~/project/packages/vm
-          command: cargo test --locked --features allow_interface_version_7,iterator,staking,stargate
+          command: cargo test --locked --features iterator,staking,stargate
       - run:
           name: Test multi threaded cache
           working_directory: ~/project/packages/vm
@@ -448,7 +448,7 @@ jobs:
       - run:
           name: Test with all features
           working_directory: ~/project/packages/vm
-          command: cargo test --locked --features allow_interface_version_7,iterator,staking,stargate
+          command: cargo test --locked --features iterator,staking,stargate
       - save_cache:
           paths:
             # ".." is the easiest way to get $HOME here (pwd is $HOME\project)

packages/vm/Cargo.toml

@@ -24,18 +24,13 @@ staking = ["cosmwasm-std/staking"]
 stargate = ["cosmwasm-std/stargate"]
 # Use cranelift backend instead of singlepass. This is required for development on Windows.
 cranelift = ["wasmer/cranelift"]
-# It's a bit unclear if interface_version_7 (CosmWasm 0.16) contracts are fully compatible
-# with newer hosts. If old contracts are important to you and you are willing to take the risk,
-# activate this feature.
-# See also https://gist.github.com/webmaster128/3cd1988680843ecaf7548050821e1e6f.
-allow_interface_version_7 = []
 
 [lib]
 # See https://bheisler.github.io/criterion.rs/book/faq.html#cargo-bench-gives-unrecognized-option-errors-for-valid-command-line-options
 bench = false
 
 [dependencies]
-bytes = "1.4.0" # need a higher version than the one required by Wasmer for the Bytes -> Vec<u8> implementation
+bytes = "1.4.0"     # need a higher version than the one required by Wasmer for the Bytes -> Vec<u8> implementation
 clru = "0.6.1"
 crc32fast = "1.3.2"
 # Uses the path when built locally; uses the given version from crates.io when published
@@ -54,8 +49,8 @@ wasmer-middlewares = "=4.2.2"
 # Dependencies that we do not use ourself. We add those entries
 # to bump the min version of them.
 bytecheck = "0.6.3" # With this version the simdutf8 dependency became optional
-enumset = "1.0.2" # Fixes https://github.com/Lymia/enumset/issues/17 (https://github.com/Lymia/enumset/commit/a430550cd6a3c9b1ef636d37f75dede7616f5b62)
-bitflags = "1.1.0" # https://github.com/CensoredUsername/dynasm-rs/pull/74
+enumset = "1.0.2"   # Fixes https://github.com/Lymia/enumset/issues/17 (https://github.com/Lymia/enumset/commit/a430550cd6a3c9b1ef636d37f75dede7616f5b62)
+bitflags = "1.1.0"  # https://github.com/CensoredUsername/dynasm-rs/pull/74
 
 # Wasmer git/local (used for quick local debugging or patching)
 # wasmer = { git = "https://github.com/wasmerio/wasmer", rev = "877ce1f7c44fad853c", default-features = false, features = ["cranelift", "singlepass"] }
@@ -64,7 +59,7 @@ bitflags = "1.1.0" # https://github.com/CensoredUsername/dynasm-rs/pull/74
 # wasmer-middlewares = { path = "../../../wasmer/lib/middlewares" }
 
 [dev-dependencies]
-criterion = { version = "0.4", features = [ "html_reports" ] }
+criterion = { version = "0.4", features = ["html_reports"] }
 glob = "0.3.1"
 hex-literal = "0.3.1"
 tempfile = "3.1.0"

packages/vm/src/compatibility.rs

@@ -47,11 +47,7 @@ const REQUIRED_EXPORTS: &[&str] = &[
 ];
 
 const INTERFACE_VERSION_PREFIX: &str = "interface_version_";
-const SUPPORTED_INTERFACE_VERSIONS: &[&str] = &[
-    "interface_version_8",
-    #[cfg(feature = "allow_interface_version_7")]
-    "interface_version_7",
-];
+const SUPPORTED_INTERFACE_VERSIONS: &[&str] = &["interface_version_8"];
 
 const MEMORY_LIMIT: u32 = 512; // in pages
 /// The upper limit for the `max` value of each table. CosmWasm contracts have
@@ -443,25 +439,6 @@ mod tests {
         let module = ParsedWasm::parse(&wasm).unwrap();
         check_interface_version(&module).unwrap();
 
-        #[cfg(feature = "allow_interface_version_7")]
-        {
-            // valid legacy version
-            let wasm = wat::parse_str(
-                r#"(module
-                    (type (func))
-                    (func (type 0) nop)
-                    (export "add_one" (func 0))
-                    (export "allocate" (func 0))
-                    (export "interface_version_7" (func 0))
-                    (export "deallocate" (func 0))
-                    (export "instantiate" (func 0))
-                )"#,
-            )
-            .unwrap();
-            let module = ParsedWasm::parse(&wasm).unwrap();
-            check_interface_version(&module).unwrap();
-        }
-
         // missing
         let wasm = wat::parse_str(
             r#"(module