Solana: How to encode an instruction and send transaction to an anchor based program using javascript
Solana coding instructions with JavaScript
Solana is a fast and safe blockchain platform that allows developers to create decentralized applications (DAPP) without requiring extensive programming knowledge. One of Solana’s key characteristics is its ability to execute transactions using specific instruction, which can be used to send funds or data between accounts.
In this article, we will go through the instruction coding process and send it to an anchor -based program using JavaScript in the Solana block chain.
PREVIOUS REQUIREMENTS
Before starting, be sure to have the following installed:
- Solana Cli (
npm install -g solana -cli)
- Node.js (14 or more)
- A Solana wallet (for example, Cli Solana wallet)
Coding instructions
Solana instructions can be coded using a specific instruction, which is defined in the [ISL)] (ISL)] ( In this example, we will use the ‘Load’ instruction to load an anchor program.
Step 1: Install the required units
Create a new directory for your project and initialize with Cli Solana:
`Bash
MKDIR SOLANA-INSTRUCTION-EXAMIN
CD Solana-Instruction-Example
Solana Init
Next, install the necessary units:
Bash
NPM Install Solana-TypeScript@last
NPM install @solana/web3.js
Step 2: Create a new Solana program
Create a new file calledIndex.tsand add the following code to create a new anchor program:
typlated
// Index.ts
Import {program} of "@solana/web3.js";
IMPORT {INSTRUCTIONID, LOADPROGRAM} from "./Instruction";
const mainprogram = wait loadprogram (
"Mainnet",
"
);
Export the predetermined Async Main () {
Const program = mainnetprogram;
constultalururl = process.env.anchor_url;
attempt {
constt const = aleait programincialid (main, loadprogram ());
console.log (result);
} capt (error) {
if (error instance of instructions of instructionbacknotfound) {
Console.error ("The Anchorror occurred.
} others {
Throwing error;
}
}
}
Step 3: Codify the instruction
Create a new file calledInstrument.tsand add the following code to encode the instruction:
typlated
// Instructions
Import {instruction, instruction} of "@solana/web3.js";
Import {programid} of "./program";
Export the predetermined async function ENCODECTION (PROGRAM: PROGRAM) {
const instructions = wait program.Loadinstruction (
instruction,
"burden",
"Mainnet",
TRUE
);
return instruction.endode ();
}
Step 4: Send the transaction
Create a new file calledSendransaction.tsand add the following code to send the transaction:
typlated
// Sendransaction.ts
Import {transaction, transaction in "@solana/web3.js";
Import {encodeinstruction, Loadprogram} from "./instruction";
const mainprogram = wait loadprogram (
"Mainnet",
"
);
Sendransaction Function () {
consta transactions = new transaction ();
const input = new transaction in ();
Input.add (LoadProgram (). Invokeinstructionid ("Load", Program);
constransaction = codedinstruction (mainnetprogram);
transaction.add (ENCODEDTRANSACTION);
Return transaction;
}
Export the predetermined Async Main () {
const tx = appeal sendransaction ();
Console.log (Tx);
}
Putting everything together
Create a new file calledindex.tsand add the following code to compile and execute the example:
` typlated
// Index.ts
Import {createprogramScript, Loadprogram} from “./instruction”;
Import {Mainnetprogram} of “.