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Metadata V16: Be more dynamic over which hasher is used. (#1974)

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* Use DynamicHasher256 to support Blake2 or Keccack depending on chain

* remove Config::Hash associated type, replace with HashFor<Config> alias

* Fix doc links

* fix wasm tests

* Don't strip system pallet associated types. check System.Hashing, not Hash. Rename BlockHash trait to Hash

* Tweak comment

* fmt

* fix merge

* Fix typo
This commit is contained in:
James Wilson
2025-04-23 10:12:48 +01:00
committed by GitHub
parent a8ae55a61b
commit 21b3f52191
43 changed files with 573 additions and 371 deletions
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core/src/tx/mod.rs
+10 -6
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@@ -9,7 +9,7 @@
//! ```rust
//! use subxt_signer::sr25519::dev;
//! use subxt_macro::subxt;
//! use subxt_core::config::PolkadotConfig;
//! use subxt_core::config::{PolkadotConfig, HashFor};
//! use subxt_core::config::DefaultExtrinsicParamsBuilder as Params;
//! use subxt_core::tx;
//! use subxt_core::utils::H256;
@@ -59,7 +59,7 @@
pub mod payload;
pub mod signer;
use crate::config::{Config, ExtrinsicParams, ExtrinsicParamsEncoder, Hasher};
use crate::config::{Config, ExtrinsicParams, ExtrinsicParamsEncoder, HashFor, Hasher};
use crate::error::{Error, ExtrinsicError, MetadataError};
use crate::metadata::Metadata;
use crate::utils::Encoded;
@@ -406,7 +406,8 @@ impl<T: Config> PartialTransactionV5<T> {
/// This represents a signed transaction that's ready to be submitted.
/// Use [`Transaction::encoded()`] or [`Transaction::into_encoded()`] to
/// get the bytes for it, or [`Transaction::hash()`] to get the hash.
/// get the bytes for it, or [`Transaction::hash_with()`] to hash the transaction
/// given an instance of [`Config::Hasher`].
pub struct Transaction<T> {
encoded: Encoded,
marker: core::marker::PhantomData<T>,
@@ -422,9 +423,12 @@ impl<T: Config> Transaction<T> {
}
}
/// Calculate and return the hash of the extrinsic, based on the configured hasher.
pub fn hash(&self) -> T::Hash {
T::Hasher::hash_of(&self.encoded)
/// Calculate and return the hash of the extrinsic, based on the provided hasher.
/// If you don't have a hasher to hand, you can construct one using the metadata
/// with `T::Hasher::new(&metadata)`. This will create a hasher suitable for the
/// current chain where possible.
pub fn hash_with(&self, hasher: T::Hasher) -> HashFor<T> {
hasher.hash_of(&self.encoded)
}
/// Returns the SCALE encoded extrinsic bytes.