tags: Solana source: https://github.com/solana-labs/solana/blob/eabe1070667e87f447b9cb892e2d916ca5b68e34/sdk/src/offchain_message.rs#L237-L240 /// Serialize the off-chain message to bytes including full header pub fn serialize(&self) -> Result<Vec<u8>, SanitizeError> { // serialize signing domain let mut data = Self::SIGNING_DOMAIN.to_vec(); // serialize version and call version specific serializer match self { Self::V0(msg) => { data.push(0); msg.serialize(&mut data)?; } } Ok(data) }
Solana PDA
tags: Solana, Solana 101: 2. Anchor What is Program Derived Address(PDA)?1 A Program Derived Address is simply an account owned by the program, but has no private key. Instead it’s signature is obtained by a set of seeds and a bump (a nonce which makes sure it’s off curve). “Generating” a Program Address is different from “creating” it.
Generating One can generate a PDA using Pubkey::find_program_address in Rust or PublicKey.findProgramAddressSync in JavaScript; Creating a PDA essentially means to initialize the address with space and set the state to it. #+end_quote
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Reverse Proxy to bypass Network Issue of Solana RPC Node
tags: Nginx One Endpoint for Both WebSocket and Normal Requests,Solana,Solana 101: Create an Escrow dApp I met a lot network issues about connecting to RPC node of Solana, so I’m using a nginx server as a reverse proxy to bypass this problem:
location / { # https://serverfault.com/a/923254 try_files /nonexistent @$http_upgrade; } location @ { proxy_pass https://api.testnet.solana.com; proxy_read_timeout 300s; proxy_send_timeout 300s; proxy_set_header Host "api.testnet.solana.com"; } location @websocket { proxy_redirect off; proxy_pass https://api.testnet.solana.com; proxy_http_version 1.1; proxy_read_timeout 300s; proxy_send_timeout 300s; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "Upgrade"; }
Solana 101: Create an Escrow dApp
tags: Solana
Solana Account
tags: Solana, Solana 101: 1. Develop Model Account: a Memory region The solana term for a memory region is “account”. Some programs own thousands of independent accounts.
Programs own accounts, aka the owner of accounts.
Transactions and Accounts You can make a program read and write data by sending transactions. Programs provide endpoints that can be called via transactions (In reality it’s a bit more complex than that but frameworks like Anchor abstract away this complexity). A function signature usually takes the following arguments:
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Solana Program
tags: Solana, Solana 101: 1. Develop Model Program Owns Accounts And each memory region has a program that manages it (sometimes called the “owner”).
How to Communicate with Solana Programs? Off-chain This means your programs aren’t on-chain program, you can submit transactions with instructions to the network, it could be done via the JSON RPC API or any SDK built on top this API.
On-chain TODO
Proof-of-history
tags: Blockchain Proof,Solana,Proof-of-stake Solana is a Proof of Stake network. This short phrase - “Proof of Stake” - represents a much larger concept with considerable complexity behind it, and even more so for Solana, which adds the unique properties of Proof of History to the mix to enable fast, low-latency transactions while still maintaining censorship resistance.
Proof-of-stake
tags: Blockchain,Blockchain Proof,Ethereum,Solana source: https://ethereum.org/en/developers/docs/consensus-mechanisms/pos/ Proof workflow:
Users stake money(ETH) to become a validator.
Validators are chosen at random to create blocks and are responsible for checking and confirming blocks they don’t create.
user’s stake is also used as a way to incentivise good validator behavior. For example, a user can lose a portion of their stake for things like going offline (failing to validate) or their entire stake for deliberate collusion.
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Shinobi Systems' Solana Proof of Stake + Proof of History Primer
tags: Blockchain,Solana,Proof-of-stake,Proof-of-history source: “Shinobi Systems’ Solana Proof of Stake + Proof of History Primer.” Accessed January 5, 2022. https://www.shinobi-systems.com/primer.html.