mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-06 09:08:18 +00:00
James Wilson
a2b8dde5e6
* Add Static type which defers to Encode/Decode and impls EncodeAsType/DecodeAsType * rename to static_type and impl Deref/Mut * Improve type substitution in codegen so that concrete types can be swapped in * A couple of comment tweaks and no need for a macro export * Extend type substitution logic to work recursively on destination type * cargo fmt * Fix a couple of comments * update ui test outpuot * Add docs and missing_docs lint * Add test for replacing multiple of Ident * Update codegen/src/error.rs Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com> * update copyright year and fix ui test * simplify another error --------- Co-authored-by: Niklas Adolfsson <niklasadolfsson1@gmail.com>
86 lines
3.1 KiB
Rust
86 lines
3.1 KiB
Rust
// Copyright 2019-2023 Parity Technologies (UK) Ltd.
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// This file is dual-licensed as Apache-2.0 or GPL-3.0.
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// see LICENSE for license details.
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//! To run this example, a local polkadot node should be running. Example verified against polkadot v0.9.28-9ffe6e9e3da.
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//!
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//! E.g.
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//! ```bash
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//! curl "https://github.com/paritytech/polkadot/releases/download/v0.9.28/polkadot" --output /usr/local/bin/polkadot --location
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//! polkadot --dev --tmp
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//! ```
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// This example showcases working with dynamic values rather than those that are generated via the subxt proc macro.
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use sp_keyring::AccountKeyring;
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use subxt::{dynamic::Value, tx::PairSigner, OnlineClient, PolkadotConfig};
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#[tokio::main]
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async fn main() -> Result<(), Box<dyn std::error::Error>> {
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let api = OnlineClient::<PolkadotConfig>::new().await?;
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// 1. Dynamic Balance Transfer (the dynamic equivalent to the balance_transfer example).
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let signer = PairSigner::new(AccountKeyring::Alice.pair());
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let dest = AccountKeyring::Bob.to_account_id();
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// Create a transaction to submit:
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let tx = subxt::dynamic::tx(
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"Balances",
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"transfer",
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vec![
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// A value representing a MultiAddress<AccountId32, _>. We want the "Id" variant, and that
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// will ultimately contain the bytes for our destination address (there is a new type wrapping
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// the address, but our encoding will happily ignore such things and do it's best to line up what
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// we provide with what it needs).
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Value::unnamed_variant("Id", [Value::from_bytes(&dest)]),
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// A value representing the amount we'd like to transfer.
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Value::u128(123_456_789_012_345),
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],
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);
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// submit the transaction with default params:
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let hash = api.tx().sign_and_submit_default(&tx, &signer).await?;
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println!("Balance transfer extrinsic submitted: {hash}");
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// 2. Dynamic constant access (the dynamic equivalent to the fetch_constants example).
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let constant_address = subxt::dynamic::constant("Balances", "ExistentialDeposit");
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let existential_deposit = api.constants().at(&constant_address)?.to_value()?;
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println!("Existential Deposit: {existential_deposit}");
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// 3. Dynamic storage access
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let storage_address = subxt::dynamic::storage(
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"System",
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"Account",
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vec![
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// Something that encodes to an AccountId32 is what we need for the map key here:
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Value::from_bytes(&dest),
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],
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);
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let account = api
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.storage()
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.at(None)
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.await?
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.fetch_or_default(&storage_address)
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.await?
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.to_value()?;
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println!("Bob's account details: {account}");
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// 4. Dynamic storage iteration (the dynamic equivalent to the fetch_all_accounts example).
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let storage_address = subxt::dynamic::storage_root("System", "Account");
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let mut iter = api
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.storage()
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.at(None)
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.await?
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.iter(storage_address, 10)
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.await?;
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while let Some((key, account)) = iter.next().await? {
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println!("{}: {}", hex::encode(key), account.to_value()?);
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}
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Ok(())
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}
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