From 9f2a83582ee2c015f192164346c9e169344e5204 Mon Sep 17 00:00:00 2001
From: Grigoriy Simonov <gsimonov@usetech.com>
Date: Wed, 23 Oct 2024 17:47:06 +0000
Subject: [PATCH] revert dependencies version bump

---
 Cargo.lock                                    | 168 ++++++------------
 Cargo.toml                                    |   8 +-
 .../frame/revive/src/evm/api/signature.rs     |   4 +-
 substrate/frame/revive/src/wasm/runtime.rs    |  32 +++-
 4 files changed, 86 insertions(+), 126 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index a42f5baa4765..d5155b5d42cb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -902,7 +902,7 @@ dependencies = [
  "parity-scale-codec",
  "polkadot-parachain-primitives",
  "polkadot-runtime-common",
- "primitive-types 0.13.1",
+ "primitive-types",
  "rococo-runtime-constants",
  "scale-info",
  "serde_json",
@@ -1036,7 +1036,7 @@ dependencies = [
  "parity-scale-codec",
  "polkadot-parachain-primitives",
  "polkadot-runtime-common",
- "primitive-types 0.13.1",
+ "primitive-types",
  "scale-info",
  "serde_json",
  "snowbridge-router-primitives",
@@ -5784,9 +5784,9 @@ dependencies = [
 
 [[package]]
 name = "ethabi-decode"
-version = "1.1.0"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9af52ec57c5147716872863c2567c886e7d62f539465b94352dbc0108fe5293"
+checksum = "09d398648d65820a727d6a81e58b962f874473396a047e4c30bafe3240953417"
 dependencies = [
  "ethereum-types",
  "tiny-keccak",
@@ -5794,33 +5794,33 @@ dependencies = [
 
 [[package]]
 name = "ethbloom"
-version = "0.14.1"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c321610643004cf908ec0f5f2aa0d8f1f8e14b540562a2887a1111ff1ecbf7b"
+checksum = "c22d4b5885b6aa2fe5e8b9329fb8d232bf739e434e6b87347c63bdd00c120f60"
 dependencies = [
  "crunchy",
  "fixed-hash",
- "impl-codec 0.7.0",
+ "impl-codec",
  "impl-rlp",
- "impl-serde 0.5.0",
+ "impl-serde 0.4.0",
  "scale-info",
  "tiny-keccak",
 ]
 
 [[package]]
 name = "ethereum-types"
-version = "0.15.1"
+version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ab15ed80916029f878e0267c3a9f92b67df55e79af370bf66199059ae2b4ee3"
+checksum = "02d215cbf040552efcbe99a38372fe80ab9d00268e20012b79fcd0f073edd8ee"
 dependencies = [
  "ethbloom",
  "fixed-hash",
- "impl-codec 0.7.0",
+ "impl-codec",
  "impl-rlp",
- "impl-serde 0.5.0",
- "primitive-types 0.13.1",
+ "impl-serde 0.4.0",
+ "primitive-types",
  "scale-info",
- "uint 0.10.0",
+ "uint",
 ]
 
 [[package]]
@@ -7677,15 +7677,6 @@ dependencies = [
  "parity-scale-codec",
 ]
 
-[[package]]
-name = "impl-codec"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b67aa010c1e3da95bf151bd8b4c059b2ed7e75387cdb969b4f8f2723a43f9941"
-dependencies = [
- "parity-scale-codec",
-]
-
 [[package]]
 name = "impl-num-traits"
 version = "0.1.2"
@@ -7694,27 +7685,16 @@ checksum = "951641f13f873bff03d4bf19ae8bec531935ac0ac2cc775f84d7edfdcfed3f17"
 dependencies = [
  "integer-sqrt",
  "num-traits",
- "uint 0.9.5",
-]
-
-[[package]]
-name = "impl-num-traits"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "803d15461ab0dcc56706adf266158acbc44ccf719bf7d0af30705f58b90a4b8c"
-dependencies = [
- "integer-sqrt",
- "num-traits",
- "uint 0.10.0",
+ "uint",
 ]
 
 [[package]]
 name = "impl-rlp"
-version = "0.4.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "54ed8ad1f3877f7e775b8cbf30ed1bd3209a95401817f19a0eb4402d13f8cf90"
+checksum = "f28220f89297a075ddc7245cd538076ee98b01f2a9c23a53a4f1105d5a322808"
 dependencies = [
- "rlp 0.6.1",
+ "rlp",
 ]
 
 [[package]]
@@ -8457,7 +8437,7 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4b286e6b663fb926e1eeb68528e69cb70ed46c6d65871a21b2215ae8154c6d3c"
 dependencies = [
- "primitive-types 0.12.2",
+ "primitive-types",
  "tiny-keccak",
 ]
 
@@ -8488,7 +8468,7 @@ dependencies = [
  "pallet-example-tasks",
  "parity-scale-codec",
  "polkadot-sdk",
- "primitive-types 0.13.1",
+ "primitive-types",
  "scale-info",
  "serde_json",
  "sp-debug-derive 14.0.0",
@@ -8902,7 +8882,7 @@ dependencies = [
  "sha2 0.10.8",
  "smallvec",
  "thiserror",
- "uint 0.9.5",
+ "uint",
  "unsigned-varint 0.7.2",
  "void",
 ]
@@ -9365,7 +9345,7 @@ dependencies = [
  "tokio-tungstenite",
  "tokio-util",
  "tracing",
- "uint 0.9.5",
+ "uint",
  "unsigned-varint 0.8.0",
  "url",
  "x25519-dalek",
@@ -10743,7 +10723,7 @@ dependencies = [
  "pallet-assets",
  "pallet-balances",
  "parity-scale-codec",
- "primitive-types 0.13.1",
+ "primitive-types",
  "scale-info",
  "sp-api 26.0.0",
  "sp-arithmetic 23.0.0",
@@ -10764,7 +10744,7 @@ dependencies = [
  "pallet-assets",
  "pallet-balances",
  "parity-scale-codec",
- "primitive-types 0.13.1",
+ "primitive-types",
  "scale-info",
  "sp-arithmetic 23.0.0",
  "sp-core 28.0.0",
@@ -12449,7 +12429,7 @@ dependencies = [
  "polkavm 0.13.0",
  "polkavm-common 0.13.0",
  "pretty_assertions",
- "rlp 0.6.1",
+ "rlp",
  "scale-info",
  "secp256k1",
  "serde",
@@ -13298,7 +13278,7 @@ checksum = "4e69bf016dc406eff7d53a7d3f7cf1c2e72c82b9088aac1118591e36dd2cd3e9"
 dependencies = [
  "bitcoin_hashes 0.13.0",
  "rand",
- "rand_core 0.6.4",
+ "rand_core 0.5.1",
  "serde",
  "unicode-normalization",
 ]
@@ -13528,7 +13508,7 @@ dependencies = [
  "polkadot-parachain-primitives",
  "polkadot-primitives",
  "polkadot-runtime-common",
- "primitive-types 0.12.2",
+ "primitive-types",
  "scale-info",
  "smallvec",
  "sp-api 26.0.0",
@@ -16576,26 +16556,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b34d9fd68ae0b74a41b21c03c2f62847aa0ffea044eee893b4c140b37e244e2"
 dependencies = [
  "fixed-hash",
- "impl-codec 0.6.0",
- "impl-num-traits 0.1.2",
- "impl-serde 0.4.0",
- "scale-info",
- "uint 0.9.5",
-]
-
-[[package]]
-name = "primitive-types"
-version = "0.13.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d15600a7d856470b7d278b3fe0e311fe28c2526348549f8ef2ff7db3299c87f5"
-dependencies = [
- "fixed-hash",
- "impl-codec 0.7.0",
- "impl-num-traits 0.2.0",
+ "impl-codec",
+ "impl-num-traits",
  "impl-rlp",
- "impl-serde 0.5.0",
+ "impl-serde 0.4.0",
  "scale-info",
- "uint 0.10.0",
+ "uint",
 ]
 
 [[package]]
@@ -16835,8 +16801,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8650aabb6c35b860610e9cff5dc1af886c9e25073b7b1712a68972af4281302"
 dependencies = [
  "bytes",
- "heck 0.4.1",
- "itertools 0.10.5",
+ "heck 0.5.0",
+ "itertools 0.12.1",
  "log",
  "multimap",
  "once_cell",
@@ -16869,7 +16835,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "81bddcdb20abf9501610992b6759a4c888aef7d1a7247ef75e2404275ac24af1"
 dependencies = [
  "anyhow",
- "itertools 0.10.5",
+ "itertools 0.12.1",
  "proc-macro2 1.0.86",
  "quote 1.0.37",
  "syn 2.0.82",
@@ -16882,7 +16848,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acf0c195eebb4af52c752bec4f52f645da98b6e92077a04110c7f349477ae5ac"
 dependencies = [
  "anyhow",
- "itertools 0.10.5",
+ "itertools 0.12.1",
  "proc-macro2 1.0.86",
  "quote 1.0.37",
  "syn 2.0.82",
@@ -17686,16 +17652,6 @@ dependencies = [
  "rustc-hex",
 ]
 
-[[package]]
-name = "rlp"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa24e92bb2a83198bb76d661a71df9f7076b8c420b8696e4d3d97d50d94479e3"
-dependencies = [
- "bytes",
- "rustc-hex",
-]
-
 [[package]]
 name = "rocksdb"
 version = "0.21.0"
@@ -18007,10 +17963,10 @@ dependencies = [
  "num-bigint",
  "num-traits",
  "parity-scale-codec",
- "primitive-types 0.12.2",
+ "primitive-types",
  "proptest",
  "rand",
- "rlp 0.5.2",
+ "rlp",
  "ruint-macro",
  "serde",
  "valuable",
@@ -19945,7 +19901,7 @@ checksum = "e98f3262c250d90e700bb802eb704e1f841e03331c2eb815e46516c4edbf5b27"
 dependencies = [
  "derive_more",
  "parity-scale-codec",
- "primitive-types 0.12.2",
+ "primitive-types",
  "scale-bits",
  "scale-decode-derive",
  "scale-type-resolver",
@@ -19972,7 +19928,7 @@ checksum = "4ba0b9c48dc0eb20c60b083c29447c0c4617cb7c4a4c9fef72aa5c5bc539e15e"
 dependencies = [
  "derive_more",
  "parity-scale-codec",
- "primitive-types 0.12.2",
+ "primitive-types",
  "scale-bits",
  "scale-encode-derive",
  "scale-type-resolver",
@@ -20693,9 +20649,9 @@ dependencies = [
 
 [[package]]
 name = "smol"
-version = "2.0.2"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a33bd3e260892199c3ccfc487c88b2da2265080acb316cd920da72fdfd7c599f"
+checksum = "aad24f41392790e6ac67f4f4cd871da61f7d758e07b5622431e491e897d9c8a7"
 dependencies = [
  "async-channel 2.3.0",
  "async-executor",
@@ -20893,7 +20849,7 @@ dependencies = [
  "serde_json",
  "siphasher 1.0.1",
  "slab",
- "smol 2.0.2",
+ "smol 2.0.1",
  "smoldot 0.16.0",
  "zeroize",
 ]
@@ -20940,7 +20896,7 @@ dependencies = [
  "hex",
  "hex-literal",
  "parity-scale-codec",
- "rlp 0.6.1",
+ "rlp",
  "scale-info",
  "serde",
  "snowbridge-ethereum",
@@ -20988,7 +20944,7 @@ dependencies = [
  "parity-bytes",
  "parity-scale-codec",
  "rand",
- "rlp 0.6.1",
+ "rlp",
  "scale-info",
  "serde",
  "serde-big-array",
@@ -21546,7 +21502,7 @@ dependencies = [
  "integer-sqrt",
  "num-traits",
  "parity-scale-codec",
- "primitive-types 0.13.1",
+ "primitive-types",
  "rand",
  "scale-info",
  "serde",
@@ -21796,7 +21752,7 @@ dependencies = [
  "parity-scale-codec",
  "parking_lot 0.12.3",
  "paste",
- "primitive-types 0.13.1",
+ "primitive-types",
  "rand",
  "regex",
  "scale-info",
@@ -21845,7 +21801,7 @@ dependencies = [
  "parity-scale-codec",
  "parking_lot 0.12.3",
  "paste",
- "primitive-types 0.12.2",
+ "primitive-types",
  "rand",
  "scale-info",
  "schnorrkel 0.11.4",
@@ -21892,7 +21848,7 @@ dependencies = [
  "parity-scale-codec",
  "parking_lot 0.12.3",
  "paste",
- "primitive-types 0.12.2",
+ "primitive-types",
  "rand",
  "scale-info",
  "schnorrkel 0.11.4",
@@ -21939,7 +21895,7 @@ dependencies = [
  "parity-scale-codec",
  "parking_lot 0.12.3",
  "paste",
- "primitive-types 0.12.2",
+ "primitive-types",
  "rand",
  "scale-info",
  "schnorrkel 0.11.4",
@@ -22585,7 +22541,7 @@ dependencies = [
  "bytes",
  "impl-trait-for-tuples",
  "parity-scale-codec",
- "primitive-types 0.12.2",
+ "primitive-types",
  "sp-externalities 0.19.0",
  "sp-runtime-interface-proc-macro 11.0.0",
  "sp-std 8.0.0",
@@ -22603,7 +22559,7 @@ dependencies = [
  "impl-trait-for-tuples",
  "parity-scale-codec",
  "polkavm-derive 0.9.1",
- "primitive-types 0.13.1",
+ "primitive-types",
  "rustversion",
  "sp-core 28.0.0",
  "sp-externalities 0.25.0",
@@ -22629,7 +22585,7 @@ dependencies = [
  "impl-trait-for-tuples",
  "parity-scale-codec",
  "polkavm-derive 0.8.0",
- "primitive-types 0.12.2",
+ "primitive-types",
  "sp-externalities 0.27.0",
  "sp-runtime-interface-proc-macro 18.0.0",
  "sp-std 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -22649,7 +22605,7 @@ dependencies = [
  "impl-trait-for-tuples",
  "parity-scale-codec",
  "polkavm-derive 0.9.1",
- "primitive-types 0.12.2",
+ "primitive-types",
  "sp-externalities 0.28.0",
  "sp-runtime-interface-proc-macro 18.0.0",
  "sp-std 14.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -23484,7 +23440,7 @@ dependencies = [
  "polkadot-primitives",
  "polkadot-runtime-parachains",
  "polkadot-test-runtime",
- "primitive-types 0.13.1",
+ "primitive-types",
  "scale-info",
  "sp-arithmetic 23.0.0",
  "sp-core 28.0.0",
@@ -24114,7 +24070,7 @@ dependencies = [
  "instant",
  "jsonrpsee 0.22.5",
  "parity-scale-codec",
- "primitive-types 0.12.2",
+ "primitive-types",
  "reconnecting-jsonrpsee-ws-client",
  "scale-bits",
  "scale-decode",
@@ -24169,7 +24125,7 @@ dependencies = [
  "hex",
  "impl-serde 0.4.0",
  "parity-scale-codec",
- "primitive-types 0.12.2",
+ "primitive-types",
  "scale-bits",
  "scale-decode",
  "scale-encode",
@@ -25522,18 +25478,6 @@ dependencies = [
  "static_assertions",
 ]
 
-[[package]]
-name = "uint"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "909988d098b2f738727b161a106cfc7cab00c539c2687a8836f8e565976fb53e"
-dependencies = [
- "byteorder",
- "crunchy",
- "hex",
- "static_assertions",
-]
-
 [[package]]
 name = "unarray"
 version = "0.1.4"
diff --git a/Cargo.toml b/Cargo.toml
index 049de32b54cf..782a426e23cb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -745,8 +745,8 @@ env_logger = { version = "0.11.2" }
 environmental = { version = "1.1.4", default-features = false }
 equivocation-detector = { path = "bridges/relays/equivocation" }
 ethabi = { version = "1.0.0", default-features = false, package = "ethabi-decode" }
-ethbloom = { version = "0.14.1", default-features = false }
-ethereum-types = { version = "0.15.1", default-features = false }
+ethbloom = { version = "0.13.0", default-features = false }
+ethereum-types = { version = "0.14.1", default-features = false }
 exit-future = { version = "0.2.0" }
 expander = { version = "2.0.0" }
 fatality = { version = "0.1.1" }
@@ -1083,7 +1083,7 @@ polkavm-derive = "0.9.1"
 polkavm-linker = "0.9.2"
 portpicker = { version = "0.1.1" }
 pretty_assertions = { version = "1.3.0" }
-primitive-types = { version = "0.13.1", default-features = false, features = ["num-traits"] }
+primitive-types = { version = "0.12.1", default-features = false }
 proc-macro-crate = { version = "3.0.0" }
 proc-macro-warning = { version = "1.0.0", default-features = false }
 proc-macro2 = { version = "1.0.86" }
@@ -1111,7 +1111,7 @@ relay-substrate-client = { path = "bridges/relays/client-substrate" }
 relay-utils = { path = "bridges/relays/utils" }
 remote-externalities = { path = "substrate/utils/frame/remote-externalities", default-features = false, package = "frame-remote-externalities" }
 reqwest = { version = "0.11", default-features = false }
-rlp = { version = "0.6.1", default-features = false }
+rlp = { version = "0.5.2", default-features = false }
 rococo-emulated-chain = { path = "cumulus/parachains/integration-tests/emulated/chains/relays/rococo" }
 rococo-parachain-runtime = { path = "cumulus/parachains/runtimes/testing/rococo-parachain" }
 rococo-runtime = { path = "polkadot/runtime/rococo" }
diff --git a/substrate/frame/revive/src/evm/api/signature.rs b/substrate/frame/revive/src/evm/api/signature.rs
index 957d50c8e324..0eb896a08c42 100644
--- a/substrate/frame/revive/src/evm/api/signature.rs
+++ b/substrate/frame/revive/src/evm/api/signature.rs
@@ -52,8 +52,8 @@ impl TransactionLegacySigned {
 	/// Get the raw 65 bytes signature from the signed transaction.
 	pub fn raw_signature(&self) -> Result<[u8; 65], ()> {
 		let mut s = [0u8; 65];
-		self.r.write_as_big_endian(s[0..32].as_mut());
-		self.s.write_as_big_endian(s[32..64].as_mut());
+		self.r.to_big_endian(s[0..32].as_mut());
+		self.s.to_big_endian(s[32..64].as_mut());
 		s[64] = self.extract_recovery_id().ok_or(())?;
 		Ok(s)
 	}
diff --git a/substrate/frame/revive/src/wasm/runtime.rs b/substrate/frame/revive/src/wasm/runtime.rs
index 00be26aeaf8b..29c171277258 100644
--- a/substrate/frame/revive/src/wasm/runtime.rs
+++ b/substrate/frame/revive/src/wasm/runtime.rs
@@ -1536,11 +1536,13 @@ pub mod env {
 	/// See [`pallet_revive_uapi::HostFn::balance`].
 	#[api_version(0)]
 	fn balance(&mut self, memory: &mut M, out_ptr: u32) -> Result<(), TrapReason> {
+		let mut bytes = [0u8; 32];
+		&self.ext.balance().to_little_endian(&mut bytes);
 		self.charge_gas(RuntimeCosts::Balance)?;
 		Ok(self.write_fixed_sandbox_output(
 			memory,
 			out_ptr,
-			&self.ext.balance().to_little_endian(),
+			&bytes,
 			false,
 			already_charged,
 		)?)
@@ -1558,10 +1560,12 @@ pub mod env {
 		self.charge_gas(RuntimeCosts::BalanceOf)?;
 		let mut address = H160::zero();
 		memory.read_into_buf(addr_ptr, address.as_bytes_mut())?;
+		let mut bytes = [0u8; 32];
+		&self.ext.balance_of(&address).to_little_endian(&mut bytes);
 		Ok(self.write_fixed_sandbox_output(
 			memory,
 			out_ptr,
-			&self.ext.balance_of(&address).to_little_endian(),
+			&bytes,
 			false,
 			already_charged,
 		)?)
@@ -1571,10 +1575,12 @@ pub mod env {
 	/// See [`pallet_revive_uapi::HostFn::chain_id`].
 	#[api_version(0)]
 	fn chain_id(&mut self, memory: &mut M, out_ptr: u32) -> Result<(), TrapReason> {
+		let mut bytes = [0u8; 32];
+		&U256::from(<E::T as Config>::ChainId::get()).to_little_endian(&mut bytes);
 		Ok(self.write_fixed_sandbox_output(
 			memory,
 			out_ptr,
-			&U256::from(<E::T as Config>::ChainId::get()).to_little_endian(),
+			&bytes,
 			false,
 			|_| Some(RuntimeCosts::CopyToContract(32)),
 		)?)
@@ -1585,10 +1591,12 @@ pub mod env {
 	#[api_version(0)]
 	fn value_transferred(&mut self, memory: &mut M, out_ptr: u32) -> Result<(), TrapReason> {
 		self.charge_gas(RuntimeCosts::ValueTransferred)?;
+		let mut bytes = [0u8; 32];
+		&self.ext.value_transferred().to_little_endian(&mut bytes);
 		Ok(self.write_fixed_sandbox_output(
 			memory,
 			out_ptr,
-			&self.ext.value_transferred().to_little_endian(),
+			&bytes,
 			false,
 			already_charged,
 		)?)
@@ -1599,10 +1607,12 @@ pub mod env {
 	#[api_version(0)]
 	fn now(&mut self, memory: &mut M, out_ptr: u32) -> Result<(), TrapReason> {
 		self.charge_gas(RuntimeCosts::Now)?;
+		let mut bytes = [0u8; 32];
+		&self.ext.now().to_little_endian(&mut bytes);
 		Ok(self.write_fixed_sandbox_output(
 			memory,
 			out_ptr,
-			&self.ext.now().to_little_endian(),
+			&bytes,
 			false,
 			already_charged,
 		)?)
@@ -1613,10 +1623,12 @@ pub mod env {
 	#[api_version(0)]
 	fn minimum_balance(&mut self, memory: &mut M, out_ptr: u32) -> Result<(), TrapReason> {
 		self.charge_gas(RuntimeCosts::MinimumBalance)?;
+		let mut bytes = [0u8; 32];
+		&self.ext.minimum_balance().to_little_endian(&mut bytes);
 		Ok(self.write_fixed_sandbox_output(
 			memory,
 			out_ptr,
-			&self.ext.minimum_balance().to_little_endian(),
+			&bytes,
 			false,
 			already_charged,
 		)?)
@@ -1667,10 +1679,12 @@ pub mod env {
 	#[api_version(0)]
 	fn block_number(&mut self, memory: &mut M, out_ptr: u32) -> Result<(), TrapReason> {
 		self.charge_gas(RuntimeCosts::BlockNumber)?;
+		let mut bytes = [0u8; 32];
+		&self.ext.block_number().to_little_endian(&mut bytes);
 		Ok(self.write_fixed_sandbox_output(
 			memory,
 			out_ptr,
-			&self.ext.block_number().to_little_endian(),
+			&bytes,
 			false,
 			already_charged,
 		)?)
@@ -2025,10 +2039,12 @@ pub mod env {
 	/// See [`pallet_revive_uapi::HostFn::return_data_size`].
 	#[api_version(0)]
 	fn return_data_size(&mut self, memory: &mut M, out_ptr: u32) -> Result<(), TrapReason> {
+		let mut bytes = [0u8; 32];
+		U256::from(self.ext.last_frame_output().data.len()).to_little_endian(&mut bytes);
 		Ok(self.write_fixed_sandbox_output(
 			memory,
 			out_ptr,
-			&U256::from(self.ext.last_frame_output().data.len()).to_little_endian(),
+			&bytes,
 			false,
 			|len| Some(RuntimeCosts::CopyToContract(len)),
 		)?)