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Paper Abstract and Keywords
Presentation 2024-07-29 09:50
Prototype blockchain oracle using Chainlink and investigation of bottleneck factors in smart contract execution
Hikaru Ishii, Akihiro Fujihara (CIT) IN2024-12
Abstract (in Japanese) (See Japanese page) 
(in English) In the realm of blockchain technology, the oracle problem, which denotes the inability of smart contracts to directly access external data, represents a significant challenge. To address this issue, Chainlink, a decentralized oracle network, has garnered considerable attention. Chainlink facilitates a secure and reliable environment for smart contracts to access external data by aggregating information from multiple trusted data sources. This study presents a prototype blockchain oracle utilizing Chainlink to provide aircraft movement data. Initially, a single-node oracle was implemented, and the data retrieval time from an API providing aircraft latitude, longitude, and altitude information was measured. The measurement process involved recording the time taken for the data to be transmitted from the external API through the oracle node to the smart contract. Furthermore, the study examined the impact of varying the number of data points and oracle node settings on the data retrieval time. Comparative experiments were also conducted on two different blockchain platforms, Ethereum and Avalanche, to analyze their respective performances. The results revealed that data retrieval on the Ethereum Goerli testnet took an average of approximately 13 minutes, whereas on the Avalanche Fuji testnet, the retrieval time was significantly reduced to an average of about 6 seconds, demonstrating a marked improvement in processing speed. These findings indicate that the processing time of oracle networks utilizing Chainlink is dependent on the characteristics of the blockchain platform employed.
Keyword (in Japanese) (See Japanese page) 
(in English) Blockchain / Oracle / Smart Contract / Chainlink / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 139, IN2024-12, pp. 13-18, July 2024.
Paper # IN2024-12 
Date of Issue 2024-07-22 (IN) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IN2024-12

Conference Information
Committee IN CCS  
Conference Date 2024-07-29 - 2024-07-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Moerenuma Park Glass Pyramid 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network Science, Future Network, Cloud/SDN/Virtualization, Contents Delivery/Contents Exchange, and others 
Paper Information
Registration To IN 
Conference Code 2024-07-IN-CCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Prototype blockchain oracle using Chainlink and investigation of bottleneck factors in smart contract execution 
Sub Title (in English)  
Keyword(1) Blockchain  
Keyword(2) Oracle  
Keyword(3) Smart Contract  
Keyword(4) Chainlink  
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1st Author's Name Hikaru Ishii  
1st Author's Affiliation Chiba Institute of Technology (CIT)
2nd Author's Name Akihiro Fujihara  
2nd Author's Affiliation Chiba Institute of Technology (CIT)
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Speaker Author-1 
Date Time 2024-07-29 09:50:00 
Presentation Time 25 minutes 
Registration for IN 
Paper # IN2024-12 
Volume (vol) vol.124 
Number (no) no.139 
Page pp.13-18 
#Pages 6 
Date of Issue 2024-07-22 (IN) 

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