Learn how to create a smart contract instruction on Solana that deposits tokens from one account to another — This post is basically a continuation of the previous post on how to mint tokens on Solana using the rust SDK. Please check it out if you want to set up tests using the solana_program_test crate. If you want to jump straight into the code before reading the post the…

In part 1 of this series we saw how to create a React+Typescript front-end that connects to the Phantom wallet and retrieves our public address. In case you need, here are the links to the articles in this series: Part 1: Connecting to the Phantom Wallet Part 2: Requesting an airdrop…

0. Review Secure the Solana Ecosystem (1) — Hello Solana Secure the Solana Ecosystem (2) — Calling Between Programs Secure the Solana Ecosystem (3) — Program Upgrade Secure the Solana Ecosystem (4) — Account Validation Secure the Solana Ecosystem (5) — Multi-Sig 1. Overview In the previous post, we discussed the implementation of the…

In April, our vulnerability detection system discovered an issue in the rBPF of Solana (i.e., the virtual machine where all the Solana dApps are running on: https://github.com/solana-labs/rbpf). After a careful investigation, we found that it is a security vulnerability that can lead to a wrong execution path of a contract…

0. Review Secure the Solana Ecosystem (1) — Hello Solana Secure the Solana Ecosystem (2) — Calling Between Programs 1. Overview In the previous blog, we introduced how to implement the cross-program invocation via function invoke and function invoke_signed. In this post, we will introduce another basic topic - Program Upgrade. 2. Deploy an Upgradable Program By default, all…

0. Review Secure the Solana Ecosystem (1) — Hello Solana Secure the Solana Ecosystem (2) — Calling Between Programs Secure the Solana Ecosystem (3) — Program Upgrade Secure the Solana Ecosystem (4) — Account Validation 1. Overview In the previous blog, we discussed the account validation, which is important to access control, in Solana…

Continue the data analysis on the transaction data I collected using the Rust program in my previous article. Let’s try to find out which pairs of accounts has the most transfer? Run the Cypher Query below: MATCH (a:Account),(b:Account) WHERE a <> b MATCH (a)-[r:TRANSFER_TO]->(b) RETURN a.key,b.key, count(r)as cnt ORDER by…

As the transactions on Blockchain can be accessed as public data, we can develop a scraping client to retrieve the data in each block for analysis. Here is the code in Rust API I used to access the Solana Blockchain. Create the RPC Client. RpcClient::new("https://solana-api.projectserum.com".to_string()); Get the current Epoch client.get_epoch_info().unwrap(); …

Solana is a project aimed at providing a high-performance blockchain. Its processing speed can be as fast as 200k transaction per second (tps), while in comparison with other popular blockchain such as BitCoin and Ethereum, their processing speed is just around 15 tps. Its extremely fast transaction time is due…

Solana meets Rust (without Anchor) — I wrote this in February 2022 sort of last minute to provide additional guidance/resources during Illini Blockchain’s Solana Onboarding. It accompanied the echo project from the Jump Crypto x Solana Labs x Pyth Bootcamp I attended in January 2022. Figured I’d put this out there as a public record. This…

Start your Solana journey by comparing programming models of Ethereum vs Solana — If you’re familiar with Ethereum and Solidity, you might be meaning to dip your toes into the Solana ecosystem. Solana’s fast blockchain is promising and exciting. Plus you increase the surface area of your web3 knowledge. But if you’ve never seen a Solana program, its syntax is freaking scary and…

0. Review Secure the Solana Ecosystem (1) — Hello Solana Secure the Solana Ecosystem (2) — Calling Between Programs Secure the Solana Ecosystem (3) — Program Upgrade 1. Overview In the previous blog, we discussed how to upgrade a program. In this post, we will introduce the access control related problems, which is one…

Solana provides the platform to help new developers build and host applications on the Solana blockchain network. This guide will introduce you to the Solana ecosystem and the developer tooling used to develop a decentralized application on Solana. Solana's Ecosystem Solang Solidity Compiler — Smart contracts written in solidity can…