mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-29 00:57:57 +00:00
James Wilson
c63ff6ec6d
* WIP EncodeAsType and DecodeAsType * remove silly cli experiment code * Get things finally compiling with EncodeAsType and DecodeAsType * update codegen test and WrapperKeepOpaque proper impl (in case it shows up in codegen) * fix tests * accomodate scale-value changes * starting to migrate to EncodeAsType/DecodeAsType * static event decoding and tx encoding to use DecodeAsFields/EncodeAsFields * some tidy up and add decode(skip) attrs where needed * fix root event decoding * #[codec(skip)] will do, and combine map_key stuff into storage_address since it's all specific to that * fmt and clippy * update Cargo.lock * remove patched scale-encode * bump scale-encode to 0.1 and remove unused dep in testing crate * update deps and use released scale-decode * update scale-value to latest to remove git branch * Apply suggestions from code review Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com> * remove sorting in derives/attr generation; spit them out in order given * re-add derive sorting; it's a hashmap * StaticTxPayload and DynamicTxPayload rolled into single Payload struct * StaticStorageAddress and DynamicStorageAddress into single Address struct * Fix storage address byte retrieval * StaticConstantAddress and DynamicConstantAddress => Address * Simplify storage codegen to fix test * Add comments * Alias to RuntimeEvent rather than making another, and prep for substituting call type * remove unnecessary clone * Fix docs and failing UI test * root_bytes -> to_root_bytes * document error case in StorageClient::address_bytes() --------- Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com>
83 lines
2.7 KiB
Rust
83 lines
2.7 KiB
Rust
// Copyright 2019-2022 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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use super::ConstantAddress;
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use crate::{
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client::OfflineClientT,
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error::Error,
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metadata::{
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DecodeWithMetadata,
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MetadataError,
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},
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Config,
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};
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use derivative::Derivative;
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/// A client for accessing constants.
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#[derive(Derivative)]
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#[derivative(Clone(bound = "Client: Clone"))]
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pub struct ConstantsClient<T, Client> {
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client: Client,
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_marker: std::marker::PhantomData<T>,
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}
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impl<T, Client> ConstantsClient<T, Client> {
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/// Create a new [`ConstantsClient`].
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pub fn new(client: Client) -> Self {
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Self {
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client,
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_marker: std::marker::PhantomData,
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}
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}
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}
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impl<T: Config, Client: OfflineClientT<T>> ConstantsClient<T, Client> {
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/// Run the validation logic against some constant address you'd like to access. Returns `Ok(())`
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/// if the address is valid (or if it's not possible to check since the address has no validation hash).
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/// Return an error if the address was not valid or something went wrong trying to validate it (ie
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/// the pallet or constant in question do not exist at all).
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pub fn validate<Address: ConstantAddress>(
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&self,
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address: &Address,
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) -> Result<(), Error> {
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if let Some(actual_hash) = address.validation_hash() {
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let expected_hash = self
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.client
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.metadata()
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.constant_hash(address.pallet_name(), address.constant_name())?;
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if actual_hash != expected_hash {
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return Err(MetadataError::IncompatibleConstantMetadata(
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address.pallet_name().into(),
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address.constant_name().into(),
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)
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.into())
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}
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}
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Ok(())
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}
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/// Access the constant at the address given, returning the type defined by this address.
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/// This is probably used with addresses given from static codegen, although you can manually
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/// construct your own, too.
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pub fn at<Address: ConstantAddress>(
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&self,
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address: &Address,
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) -> Result<Address::Target, Error> {
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let metadata = self.client.metadata();
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// 1. Validate constant shape if hash given:
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self.validate(address)?;
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// 2. Attempt to decode the constant into the type given:
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let pallet = metadata.pallet(address.pallet_name())?;
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let constant = pallet.constant(address.constant_name())?;
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let value = <Address::Target as DecodeWithMetadata>::decode_with_metadata(
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&mut &*constant.value,
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constant.ty.id(),
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&metadata,
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)?;
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Ok(value)
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}
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}
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