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config: Handle hasher and header

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Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
This commit is contained in:
Alexandru Vasile
2024-05-08 08:34:52 +00:00
parent a1434a9764
commit 609b701d4d
4 changed files with 125 additions and 8 deletions
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subxt/examples/metadata_config.rs
+18 -2
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@@ -1,5 +1,6 @@
#![allow(missing_docs)]
use subxt::{OnlineClient, SubstrateConfig};
use subxt_core::config::substrate::SubstrateHeader;
use subxt_core::config::{Config, DefaultExtrinsicParams};
use subxt_signer::sr25519::dev;
@@ -20,10 +21,25 @@ impl Config for MetadataConfig {
// Present in metadata but this PoC needs to add
// fn specific per name of type to impl the hashing fn.
type Hasher = <SubstrateConfig as Config>::Hasher;
// type Hasher = <SubstrateConfig as Config>::Hasher;
//
// TODO: Eventually extend this to a DynamicHasher object instead.
// Similar logic already exists for StorageHasher.
type Hasher = polkadot::custom_types::Hashing;
// Present in metadata but this PoC needs to impl the header
// trait to make use of this.
type Header = <SubstrateConfig as Config>::Header;
// type Header = <SubstrateConfig as Config>::Header;
// The metadata header type must implement `Deserialize`, which
// must be manually implemented for the Digest logs of the header.
// An alternative is to extract the header number and use the
// generated hasher to expose the same information, this is not
// as robust and codgen can be used instead.
// type Header = polkadot::custom_types::Header;
type Header =
SubstrateHeader<polkadot::custom_types::HeaderNumber, polkadot::custom_types::Hashing>;
// Same story, present in md but needs subxt::tx::Signer<T>.
// type Signature = polkadot::custom_types::Signature;
type Signature = <SubstrateConfig as Config>::Signature;