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Blockchain Ardor: Tutorial Seminar on Turing-complete Ignis Lightweight Contracts with Lior Yaffe

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Blockchain Ardor: Tutorial Seminar on Turing-complete Ignis Lightweight Contracts with Lior Yaffe

935 views November 11, 2018 28:09

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ChannelArdor Blockchain-as-a-Service

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Blockchain Ardor is a series of educational videos sponsored by Jelurida. In this installment, Lead Developer and Managing Director of Jelurida, Lior Yaffe, leads an introductory technical seminar on Ardor's revolutionary Turing-complete lightweight contracts deployed to the Ignis child chain. Timestamps:
0:00 Introduction
1:18 Start of the Seminar
2:31 Skill and Software Requirements for Developing Lightweight Contracts
3:30 Next Steps: Updating Ardor blockchain and Opening your IntelliJ IDE project
4:22 What is included in the Ardor software package?
5:20 Best Practice: Unit Tests for each Contract
5:40 Get Started With Basic Sample Contracts
6:15 ContractSuiteRunner
6:30 2-step Process for Deploying Lightweight Contracts to the Blockchain: Contract Manager Utility
7:50 Executing Contracts on the Blockchain: Contract Runner and Triggers
8:36 4 Ways to Trigger Contracts: Trigger Transactions
9:45 What Happens with the “Hello World” Sample Contract? Messaging
9:59 What Happens with the “Random Payments” Sample Contract? Randomization
10:40 4 Ways to Trigger Contracts: Block Trigger
10:55 4 Ways to Trigger Contracts: Voucher Trigger
11:37 4 Ways to Trigger Contracts: Trigger by API
11:59 Benefits of LWCs – No Systematic Risk to Network
12:25 Benefits of LWCs – No Contract Metering or Gas
12:40 Overview of the Context Object: Your Interface with the Blockchain
13:56 Lightweight Contracts are Stateless – What does this mean?
14:20 Best Practice on Contract Design
14:59 Parallel Contracts
15:08 Versioning and Upgrading Contracts
15:50 No Costly Data Migration
16:00 Integration with Java Libraries
16:28 Oracle Contracts and External Integration
18:03 Security of Lightweight Contracts
19:01 Risk Mitigation #1: Expired Transactions
20:30 Risk Mitigation #2: Block Trigger on Forks – Double Spend
21:54 Risk Mitigation #3: Trusting a Single Node
22:51 Basic Mitigation: Verification Nodes
24:00 Advanced Mitigation: Account Control and Approval Nodes
25:30 Risk Mitigation #4: Trusting a Contract Runner Node to Execute
26:27 Conclusion


Resources:
Lightweight Contracts on the wiki: nxtwiki.org/wiki/Lightweight_Contracts

Lightweight Contracts Medium Posts: medium.com/@lyaffe/lightweight-contracts-articl…

NXT.Properties Guidance: desk.zoho.eu/portal/jelurida/kb/articles/node-c…

Jelurida website: jelurida.com/

How to download the testnet: youtu.be/UFuQfJJSjYg?t=2m

About this tutorial

Ardor Blockchain-as-a-Service published this 28:09 video tutorial on November 11, 2018. It has been watched 935 times on YouTube.

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28:09
Published
November 11, 2018
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935
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