mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-02 23:27:24 +00:00
Xiliang Chen
105 lines
3.4 KiB
Rust
105 lines
3.4 KiB
Rust
// Copyright 2019-2020 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Substrate is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Substrate. If not, see <http://www.gnu.org/licenses/>.
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//! RPC interface for the transaction payment module.
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use std::sync::Arc;
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use codec::{Codec, Decode};
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use sp_blockchain::HeaderBackend;
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use jsonrpc_core::{Error as RpcError, ErrorCode, Result};
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use jsonrpc_derive::rpc;
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use sp_runtime::{generic::BlockId, traits::{Block as BlockT, MaybeDisplay, MaybeFromStr}};
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use sp_api::ProvideRuntimeApi;
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use sp_core::Bytes;
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use pallet_transaction_payment_rpc_runtime_api::RuntimeDispatchInfo;
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pub use pallet_transaction_payment_rpc_runtime_api::TransactionPaymentApi as TransactionPaymentRuntimeApi;
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pub use self::gen_client::Client as TransactionPaymentClient;
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#[rpc]
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pub trait TransactionPaymentApi<BlockHash, ResponseType> {
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#[rpc(name = "payment_queryInfo")]
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fn query_info(
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&self,
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encoded_xt: Bytes,
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at: Option<BlockHash>
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) -> Result<ResponseType>;
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}
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/// A struct that implements the [`TransactionPaymentApi`].
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pub struct TransactionPayment<C, P> {
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client: Arc<C>,
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_marker: std::marker::PhantomData<P>,
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}
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impl<C, P> TransactionPayment<C, P> {
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/// Create new `TransactionPayment` with the given reference to the client.
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pub fn new(client: Arc<C>) -> Self {
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TransactionPayment { client, _marker: Default::default() }
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}
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}
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/// Error type of this RPC api.
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pub enum Error {
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/// The transaction was not decodable.
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DecodeError,
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/// The call to runtime failed.
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RuntimeError,
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}
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impl From<Error> for i64 {
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fn from(e: Error) -> i64 {
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match e {
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Error::RuntimeError => 1,
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Error::DecodeError => 2,
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}
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}
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}
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impl<C, Block, Balance, Extrinsic> TransactionPaymentApi<<Block as BlockT>::Hash, RuntimeDispatchInfo<Balance>>
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for TransactionPayment<C, (Block, Extrinsic)>
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where
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Block: BlockT,
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C: Send + Sync + 'static + ProvideRuntimeApi<Block> + HeaderBackend<Block>,
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C::Api: TransactionPaymentRuntimeApi<Block, Balance, Extrinsic>,
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Balance: Codec + MaybeDisplay + MaybeFromStr,
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Extrinsic: Codec + Send + Sync + 'static,
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{
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fn query_info(
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&self,
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encoded_xt: Bytes,
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at: Option<<Block as BlockT>::Hash>
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) -> Result<RuntimeDispatchInfo<Balance>> {
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let api = self.client.runtime_api();
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let at = BlockId::hash(at.unwrap_or_else(||
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// If the block hash is not supplied assume the best block.
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self.client.info().best_hash
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));
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let encoded_len = encoded_xt.len() as u32;
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let uxt: Extrinsic = Decode::decode(&mut &*encoded_xt).map_err(|e| RpcError {
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code: ErrorCode::ServerError(Error::DecodeError.into()),
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message: "Unable to query dispatch info.".into(),
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data: Some(format!("{:?}", e).into()),
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})?;
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api.query_info(&at, uxt, encoded_len).map_err(|e| RpcError {
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code: ErrorCode::ServerError(Error::RuntimeError.into()),
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message: "Unable to query dispatch info.".into(),
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data: Some(format!("{:?}", e).into()),
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})
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}
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}
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