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// Copyright 2020 Parity Technologies (UK) Ltd. // This file is part of Substrate. // Substrate is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // Substrate is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with Substrate. If not, see <http://www.gnu.org/licenses/>. //! A crate that hosts a common definitions that are relevant for the pallet-contracts. #![cfg_attr(not(feature = "std"), no_std)] use sp_std::prelude::*; /// A result type of a get storage call. pub type GetStorageResult = Result<Option<Vec<u8>>, ContractAccessError>; /// The possible errors that can happen querying the storage of a contract. #[derive(Eq, PartialEq, codec::Encode, codec::Decode, sp_runtime::RuntimeDebug)] pub enum ContractAccessError { /// The given address doesn't point to a contract. DoesntExist, /// The specified contract is a tombstone and thus cannot have any storage. IsTombstone, } /// A result type of a `rent_projection` call. pub type RentProjectionResult<BlockNumber> = Result<RentProjection<BlockNumber>, ContractAccessError>; #[derive(Eq, PartialEq, codec::Encode, codec::Decode, sp_runtime::RuntimeDebug)] pub enum RentProjection<BlockNumber> { /// Eviction is projected to happen at the specified block number. EvictionAt(BlockNumber), /// No eviction is scheduled. /// /// E.g. because the contract accumulated enough funds to offset the rent storage costs. NoEviction, }