mirror of https://github.com/hyperledger/besu
An enterprise-grade Java-based, Apache 2.0 licensed Ethereum client https://wiki.hyperledger.org/display/besu
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49 lines
1.4 KiB
49 lines
1.4 KiB
/*
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* Copyright 2018 ConsenSys AG.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
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* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*/
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pragma solidity ^0.4.17;
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contract Adoption {
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address[16] public adopters;
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// Adopting a pet
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function adopt(uint petId) public returns (uint) {
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require(petId >= 0 && petId <= 15);
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adopters[petId] = msg.sender;
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return petId;
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}
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// who has adopted this pet?
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function getOwner(uint petId) public view returns (address) {
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require(petId >= 0 && petId <= 15);
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return adopters[petId];
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}
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// is this pet adopted?
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function isAdopted(uint petId) public view returns (bool) {
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require(petId >= 0 && petId <= 15);
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return adopters[petId] != 0;
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}
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// Adopting a pet
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function unadopt(uint petId) public returns (uint) {
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require(petId >= 0 && petId <= 15);
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adopters[petId] = 0;
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return petId;
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}
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// Retrieving the adopters
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function getAdopters() public view returns (address[16]) {
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return adopters;
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}
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}
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