Solana: What is the difference between .rpc() and .instruction() in anchor test?

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Solana: What is the difference between .rpc () and .Instruction () in Anchor test?

As a solana developer, you’re likely familiar with the Anchor 'Library, which provides a convenient interface for interacting with the Solana Blockchain. Two common functions that can be used to send instructions are.rpc ()(Remote Procedure Call) and.instruction (). While they may be a similar, there's an important difference between them.

. RPC ()

The.rpc ()Function is designed to serend requests to the solana blockchain in a specific way. When you call.rpc (), it creates a request that can be executed on the blockchain. The request contains metadata about the instruction, such as its name, signature, and argument. This metadata allows the request to be matched with existing instructions on the blockchain.

HERE'S AN EXAMPLE OF HOW TO USE.RPC ():

JavaScript

Const Anchor = Require ('@Anchor-Protocol/Anchors');

// Create a New Account

Const accountid = anchor.web3.eth.accounts._new ();

// define the instruction

Const Instruction = {{

Name: 'My Instruction',

Args: [1, 2, 3],

};

// Send the Request to .rpc ()

anchor.rpc (). Instruction ({

Address: Accountid,

Signature: 'Your_signature_here',

Date: Instruction,

}). then ((response) => console.log (response));

. Instruction ()

The .instruction () Function is designed to wand instructions directly from a program or a script. When you call .instruction (), it creates an instruction that can be executed on the blockchain without any additional metadata.

HERE’S AN example of how to use .instruction ():

`JavaScript

Const Anchor = Require ('@Anchor-Protocol/Anchors');

// Create a New Account

Const accountid = anchor.web3.eth.accounts._new ();

// define the script

const script = {

Code: 'Function () {Self.Addaccount (Accountid); } ',

};

// send the instruction to .instruction ()

anchor.rpc (). Instruction (script) .then ((response) => console.log (response));

Key Differences

So, what’s the key difference between .rpc () and .instruction ()? `

• Metadata

  :.rpc ()Requires metadata about the instruction, while.instruction ()does not.

• Execution

  :.rpc ()Executes the request on the blockchain, while.instruction ()can be executed directly by a program or script.

In your case, if you are sending an instruction directly using.rpc (), it's likely that the issue is related to how you are creating and executing the instruction. Make sure you providing the correct metadata, such as theaddressof the account and any additional argument.

Here's an example of how to create a new instruction with.instruction ()and execute it:

JavaScript

Const Anchor = Require ('@Anchor-Protocol/Anchors');

// Create a New Account

Const accountid = anchor.web3.eth.accounts._new ();

// define the script

const script = {

Code: 'Function () {Self.Addaccount (Accountid); } ',

};

// send the instruction to .instruction ()

anchor.rpc (). Instruction (script) .then ((response) => console.log (response));

In summary, .rpc () is used for sending requests to the blockchain, while .instruction () is used to send instructions directly from a program or script. Make sure you are using the correct function and providing the correct metadata when creating and executing your instruction.