I added these pallets into runtime Cargo.toml :

pallet-contracts = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git",  " branch" = "polkadot-v0.9.35" }
pallet-contracts-primitives = { version = "7.0.0", default-features = false, git = "https://github.com/paritytech/substrate.git",  " branch" = "polkadot-v0.9.35" }

And added this codes into the lib.rs:

    pub struct Runtime
        Block = Block,
        NodeBlock = opaque::Block,
        UncheckedExtrinsic = UncheckedExtrinsic,
        DEX: pallet_dex,
        Contracts: pallet_contracts,


config :

parameter_types! {
    pub const DepositPerItem: Balance = deposit(1, 0);
    pub const DepositPerByte: Balance = deposit(0, 1);
    pub const DeletionQueueDepth: u32 = 128;
    pub DeletionWeightLimit: Weight = AVERAGE_ON_INITIALIZE_RATIO * BlockWeights::get().max_block;
    pub Schedule: pallet_contracts::Schedule<Runtime> = Default::default();

impl pallet_contracts::Config for Runtime {
    type Time = Timestamp;
    type Randomness = RandomnessCollectiveFlip;
    type Currency = Balances;
    type RuntimeEvent = RuntimeEvent;
    type RuntimeCall = RuntimeCall;
    type CallFilter = Nothing;
    type WeightPrice = pallet_transaction_payment::Pallet<Self>;
    type WeightInfo = pallet_contracts::weights::SubstrateWeight<Self>;
    type ChainExtension = ();
    type Schedule = Schedule;
    type CallStack = [pallet_contracts::Frame<Self>; 31];
    type DeletionQueueDepth = DeletionQueueDepth;
    type DeletionWeightLimit = DeletionWeightLimit;
    type DepositPerByte = DepositPerByte;
    type DepositPerItem = DepositPerItem;
    type AddressGenerator = pallet_contracts::DefaultAddressGenerator;
    type MaxCodeLen = ConstU32<{ 256 * 1024 }>;
    type MaxDebugBufferLen = ConstU32<{ 256 * 1024 }>;

    type MaxStorageKeyLen = ConstU32<{ 512 * 1024 }>;
    type UnsafeUnstableInterface = ConstBool<true>;

In the next step I want to upload a smart contract in this enviroment :


enter image description here

**** But the next button isn't active, and also I can't find the contract address.

What's the problem? How can I solve this problem???

  • Can you share your repo link here. Jun 12, 2023 at 16:18

1 Answer 1


It looks like is an issue with the version. See the alert from the Substrate Contracts UI repository:

❗Only compatible with nodes that use WeightV2. For older nodes use this deployment❗

Try to deploy the smart contract in using this link: https://weightv1--contracts-ui.netlify.app/

Or try to update your node using the last version of Polkadot. For testing you can try to run the last version of substrate-contracts-node and see if your contract can be deployed here.

  • thanks for answer but i want to use my substrate node , not using the substrate-contract-node .
    – Mr Coder
    Feb 2, 2023 at 16:39
  • 1
    Yes, it was just to test. With your node as I said in the response try to upload your contract in weightv1--contracts-ui.netlify.app or update the version of your node.
    – Alex Bean
    Feb 2, 2023 at 16:42
  • man sorry for this but i still dont undrestand . let me explain my project . i want to implement dex in substrate . user can upload them smart contract and add that contract address into the my dex . know if i use ` substrate-contracts-node` for upload the smart contract , can i access to that smart contract for transfer token or any thing in my substrate node or not ?
    – Mr Coder
    Feb 2, 2023 at 17:06
  • Your issue here is that the next button isn't active, so you can not deploy the smart contract, isn't it? Try to upload using the link I mention before instead of the contracts-ui.substrate.io
    – Alex Bean
    Feb 2, 2023 at 17:11

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