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f9e3d1b142
We could've added a storage API, and fetched fields that way, except we want the storage to be opaque. That meant we needed to add the RPC routes to the node, which also simplifies other people writing RPC code and fetching these fields. Then the node could've used the storage API, except a lot of the storage in validator-sets is marked opaque and to only be read via functions, so extending the runtime made the most sense.
54 lines
1.7 KiB
Rust
54 lines
1.7 KiB
Rust
use sp_blockchain::{Error as BlockchainError, HeaderMetadata, HeaderBackend};
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use sc_client_api::BlockBackend;
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use serai_abi::{primitives::prelude::*, SubstrateBlock as Block};
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pub(super) fn block_hash<
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C: HeaderMetadata<Block, Error = BlockchainError> + HeaderBackend<Block> + BlockBackend<Block>,
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>(
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client: &C,
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params: &jsonrpsee::types::params::Params,
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) -> Result<<Block as sp_runtime::traits::Block>::Hash, jsonrpsee::types::error::ErrorObjectOwned> {
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#[derive(sp_core::serde::Deserialize)]
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#[serde(crate = "sp_core::serde")]
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struct BlockByHash {
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block: String,
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};
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#[derive(sp_core::serde::Deserialize)]
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#[serde(crate = "sp_core::serde")]
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struct BlockByNumber {
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block: u64,
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};
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Ok(if let Ok(block_hash) = params.parse::<BlockByHash>() {
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let Some(block_hash) = hex::decode(&block_hash.block).ok().and_then(|bytes| {
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<[u8; 32]>::try_from(bytes.as_slice())
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.map(<Block as sp_runtime::traits::Block>::Hash::from)
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.ok()
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}) else {
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return Err(jsonrpsee::types::error::ErrorObjectOwned::owned(
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-1,
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"requested block hash wasn't a valid hash",
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Option::<()>::None,
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));
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};
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block_hash
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} else {
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let Ok(block_number) = params.parse::<BlockByNumber>() else {
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return Err(jsonrpsee::types::error::ErrorObjectOwned::owned(
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-1,
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"requested block wasn't a valid hash nor number",
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Option::<()>::None,
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));
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};
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let Ok(Some(block_hash)) = client.block_hash(block_number.block) else {
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return Err(jsonrpsee::types::error::ErrorObjectOwned::owned(
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-2,
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"couldn't find requested block's hash",
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Option::<()>::None,
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));
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};
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block_hash
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})
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}
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