Contracts: migrate to fungible traits

bin/node/runtime/src/lib.rs

@@ -1230,6 +1230,7 @@ impl pallet_contracts::Config for Runtime {
 	type Time = Timestamp;
 	type Randomness = RandomnessCollectiveFlip;
 	type Currency = Balances;
+	type Balance = Balance;
 	type RuntimeEvent = RuntimeEvent;
 	type RuntimeCall = RuntimeCall;
 	/// The safest default is to allow no calls at all.
@@ -1252,6 +1253,7 @@ impl pallet_contracts::Config for Runtime {
 	type MaxStorageKeyLen = ConstU32<128>;
 	type UnsafeUnstableInterface = ConstBool<false>;
 	type MaxDebugBufferLen = ConstU32<{ 2 * 1024 * 1024 }>;
+	type RuntimeHoldReason = RuntimeHoldReason;
 	#[cfg(not(feature = "runtime-benchmarks"))]
 	type Migrations = ();
 	#[cfg(feature = "runtime-benchmarks")]

frame/contracts/Cargo.toml

@@ -39,6 +39,7 @@ environmental = { version = "1.1.4", default-features = false }
 frame-benchmarking = { version = "4.0.0-dev", default-features = false, path = "../benchmarking", optional = true }
 frame-support = { version = "4.0.0-dev", default-features = false, path = "../support" }
 frame-system = { version = "4.0.0-dev", default-features = false, path = "../system" }
+pallet-balances = { version = "4.0.0-dev", path = "../balances", optional = true, default-features = false }
 pallet-contracts-primitives = { version = "24.0.0", default-features = false, path = "primitives" }
 pallet-contracts-proc-macro = { version = "4.0.0-dev", path = "proc-macro" }
 sp-api = { version = "4.0.0-dev", default-features = false, path = "../../primitives/api" }
@@ -82,11 +83,13 @@ std = [
 	"log/std",
 	"rand/std",
 	"environmental/std",
+	"pallet-balances?/std",
 ]
 runtime-benchmarks = [
 	"frame-benchmarking/runtime-benchmarks",
 	"rand",
 	"rand_pcg",
+	"pallet-balances",
 	"wasm-instrument",
 ]
 try-runtime = ["frame-support/try-runtime"]

frame/contracts/README.md

@@ -9,8 +9,8 @@ The Contracts module provides functionality for the runtime to deploy and execut
 
 ## Overview
 
-This module extends accounts based on the `Currency` trait to have smart-contract functionality. It can
-be used with other modules that implement accounts based on `Currency`. These "smart-contract accounts"
+This module extends accounts based on the [`frame_support::traits::fungible`] traits to have smart-contract functionality. It can
+be used with other modules that implement accounts based on [`frame_support::traits::fungible`]. These "smart-contract accounts"
 have the ability to instantiate smart-contracts and make calls to other contract and non-contract accounts.
 
 The smart-contract code is stored once, and later retrievable via its `code_hash`.