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[pallet-revive] implement the base fee API (#6964)
This PR implements the base fee syscall API method. Currently this is implemented as a compile time constant in the revive compiler, returning 0. However, since this is an opocde, if we ever need to implement it for compatibility reasons with [EIP-1559](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1559.md), it would break already deployed contracts. Thus we provide a syscall method instead. --------- Signed-off-by: xermicus <[email protected]> Signed-off-by: Cyrill Leutwiler <[email protected]> Co-authored-by: command-bot <>
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title: '[pallet-revive] implement the base fee API' | ||
doc: | ||
- audience: Runtime Dev | ||
description: This PR implements the base fee syscall API method. Currently this | ||
is implemented as a compile time constant in the revive compiler, returning 0. | ||
However, since this is an opocde, if we ever need to implement it for compatibility | ||
reasons with [EIP-1559](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1559.md), | ||
it would break already deployed contracts. Thus we provide a syscall method instead. | ||
crates: | ||
- name: pallet-revive-fixtures | ||
bump: minor | ||
- name: pallet-revive | ||
bump: minor | ||
- name: pallet-revive-uapi | ||
bump: minor |
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// This file is part of Substrate. | ||
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// Copyright (C) Parity Technologies (UK) Ltd. | ||
// SPDX-License-Identifier: Apache-2.0 | ||
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// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
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//! Returns the base fee back to the caller. | ||
#![no_std] | ||
#![no_main] | ||
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extern crate common; | ||
use uapi::{HostFn, HostFnImpl as api, ReturnFlags}; | ||
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#[no_mangle] | ||
#[polkavm_derive::polkavm_export] | ||
pub extern "C" fn deploy() {} | ||
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#[no_mangle] | ||
#[polkavm_derive::polkavm_export] | ||
pub extern "C" fn call() { | ||
let mut buf = [0; 32]; | ||
api::base_fee(&mut buf); | ||
api::return_value(ReturnFlags::empty(), &buf); | ||
} |
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