Questions tagged [anchor]
Should be used for all things relating to the Anchor Framework.
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Is it possible to set up an account to point to another account?
I'm making an anchor program where I would like to make a user ID easily retrievable with their Pk, sequential ID or username. one way I thought is to make a PK link account (in case the seed for the ...
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How to parse the inner instructions of the transaction's instruction?
Its parsing only transaction instructions, but not inner.
import { PublicKey, Connection, LAMPORTS_PER_SOL } from "@solana/web3.js";
import { SolanaParser } from "@debridge-finance/...
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Problem with testing a name service smart contract written in Solang
I'm trying to run a benchmark for a Solana node using this name service I wrote in Solang within an Anchor project.
This is the Solang smart contract.
import 'solana';
contract eclipse_ns {
...
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no method named `try_to_vec` found for reference `&UpdateArgs` in the current scope
Here is my idl:
use solana_idlgen::idlgen;
idlgen!({
"version": "0.1.0",
"name": "wba_prereq",
"instructions": [
{
&...
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3
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Proper way to integrate Solana's Wallet Adapter with Anchor and further questions
After spending some days battling to implement Phantom + Anchor I found out about Solana's Wallet adapter. I sighed in relief thinking the end was nigh but:
The the wallet adapter for Solana Apps is ...
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29
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How to run ONLY ONE test in Anchor 0.29.0?
This error came back in 2023 after the previous post here from 2022 August.
anchor run test1 now gave me Error: failed to get recent blockhash: TypeError: fetch failed !!??
That is because it does not ...
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2
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36
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How to give authority of PDA to another program
I have two programs.
// program one
#[derive(Accounts)]
pub struct MyContext<'info> {
...
#[account(mut)]
pub pda_in_prog_1: PDA_ONE<'info, T>,
pub system_program: Program<'...
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74
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Error when two `programs.devnet` found in anchor
Could someone explain what the differences are to [programs.localnet], [programs.devnet] and possibly [programs.mainnet-beta] defined in Anchor.toml
The anchor-lang reference for the manifest only ...
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24
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Challenges with Lifetime Specifiers and Attribute Macros in Solana Playground: Seeking Guidance
Hello Solana Community,
I'm developing a smart contract using Solana Playground (beta.solpg.io), and I've encountered several compilation errors that I'm struggling to resolve. My contract involves ...
3
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3
answers
57
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is it possible to know the caller of an instruction
TL;DR, how can I get the address of the person calling an instruction inside my anchor program.
In my anchor program, I want to know the person who is calling my program.
Say I have an instruction ...
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When would the #[account(rent_exempt = skip)] and #[account(rent_exempt = enforce)] constraints be used?
Since newly created accounts are required to be rent-exempt, what are some examples where the #[account(rent_exempt = skip)] and #[account(rent_exempt = enforce)] anchor constraints would need to be ...
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When would #[account(signer)] constraint be used instead of Signer account type?
The docs.rs page mentions:
Consider using the Signer type if you would only have this constraint
on the account.
What would be some examples where you would want to use the #[account(signer)] ...
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38
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Error: Signature verification failed while initialising PDA
I've been working on Solana program that should hold two different tokens for me in a Vault in an ATA. The first token should be deposited during Vault initialisation, the second will be deposited by ...
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1
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AccountOwnedByWrongProgram
I've been working on Solana program that should hold two different tokens for me in a Vault in an ATA. The first token should be deposited during Vault initialisation, the second will be deposited by ...
3
votes
1
answer
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What is the definitive way of wrapping sol in anchor?
I would like to handle all the wrapping and transferring of sol in the anchor instruction. not in the frontend, but I cant seem to find any examples of how I wrap sol in an instruction on-chain.
If i ...
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why im getting this error when i run anchor init and anchor build :Error: Invalid Base58 string
i dunno why im getting this issue when i run anchor build or init , here is the error : Error: Invalid Base58 string
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'called `Option::unwrap()` on a `None` value'
I have updated Anchor to ^0.29.0, Solana to 1.16.18 (did try 1.17.4), and Rust Compiler to 1.73.0. The anchor build runs successfully, however, the anchor test always throws this exception. I have ...
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nft delegate confusion (metaplex token metadata)
I'm trying to delegate an pnft to a pda.
but I keep getting incorrect account owner.
I can't for the life of me know how the account owner is incorrect. and what the delegate field in the ...
0
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1
answer
29
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How do I get the recent blockhashses during program execution?
I want to get the latest blockhash (or last 10 or so) during program execution. The goal is prove that the tx was created and executed in real time. Here are the steps that I am thinking:
get latest ...
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Is there a go package to create clients for anchor programs?
Like typescript package do we have go package that generates clients for solana anchor programs?
2
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1
answer
27
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HashMaps in Anchor
Does anyone have experience using HashMaps in an Anchor project?
I have the following implementation for a struct:
#[account]
#[derive(Debug)]
pub struct Company {
pub id: u64, // 8 bytes
pub ...
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2
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0
answers
20
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How does anchor test work?
new to solana. I have a project called day2. I have run anchor build in day2 and all it does is print integers. The command anchor build creates a json file day2.json in file day2/target/idl. However, ...
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What is the best way to do "safe math" in rust or anchor programs?
I know with rust you need to be sure you do not cause buffer overflows/underflows when performing math operations.
What are the best practices for doing common math safely within programs? Adding, ...
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17
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Error: memory allocation failed, out of memory. When using dynamic seed in anchor
I am getting and memory allocation failed error when I am passing in a dynamic seed for my account initialization.
This is how i use it:
pub fn chop_tree(ctx: Context<ChopTree>, counter: u16, ...
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1
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41
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Unable to upload Solang generated idl
$ anchor idl init -f target/idl/program.json `solana address -k target/deploy/program-keypair.json`
Error: RPC response error -32002: Transaction simulation failed: Error processing Instruction 0: ...
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votes
1
answer
55
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Transaction failing while calling a Solana program with PDA
I'm calling a function of anchor_movie_review_program program on devnet CLA5Pk8tpcsA3RPmCYPaRNBdU6xBknRnqshsT1bKT7if.
I cloned the following GitHub https://github.com/Unboxed-Software/anchor-movie-...
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0
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17
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Call Instructions Anchor IDL error address not inicialized
I am trying to replicate some calls to an Anchor IDL of a contract. And all the instructions work for me, but the most important one doesn't. And I have a couple of doubts, comparing my calls with the ...
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How to validate that a cNFT is part of a collection in a program
I want to validate in a program that a cNFT is in a particular collection. Is there a better way to do this than adding a PDA as a delegate to the cNFT collection so that it can sign and call the ...
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Anchor idl upgrade triggers: require_gte expression was violated
i had to recompile anchor to print the error (is there away to stream idl write logs during anchor idl upgrade|install?)
> ../anchor/target/debug/anchor idl upgrade ...
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2
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3
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68
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Extending struct fields in a PDA and ensuring compatibility
I need to extend the fields I have within a PDA. Some accounts are already live, so I want those to still be compatible with the new layout. As a simple illustrative example, consider this account ...
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18
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Anchor build error with apecs crate
Within a new empty project,
after adding the apecs crate:
[dependencies]
anchor-lang = "0.28.0"
apecs = "0.7.0"
I get the following errors:
Error: Function ...
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Error: ELF error from deploying an anchor project
I have been trying to deploy my anchor project on the local net. I started by running solana-test-validator and then anchor deploy but I keep receiving this error:
Error: ELF error: ELF error: ...
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votes
1
answer
28
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Are writes to BTreeMaps expensive? How much compute units does it take?
I am using a quite a few BTreeMaps and i am writing to 2 BTreeMaps and it is using all the compute units. So i wanted to know how much compute units it takes and what can be the alternatives for using ...
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1
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Getting ConstraintRaw Error
I'm integrating smart contract in next js. and getting this error
Uncaught (in promise) Error: failed to send transaction: Transaction simulation failed: Error processing Instruction 2: custom program ...
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1
answer
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Solang anchor commands after "anchor init <name> --solidity" yields "Error: No such file or directory (os error 2)"
To reproduce:
anchor init <name> --solidity
anchor build
# output: Error: No such file or directory (os error 2)
I have tried many logging options but none showed any relevant information.
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25
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Anchor clockwork-sdk error
I have a basic anchor project with no modifications made other then adding the clockwork-sdk in Cargo.toml. When I run anchor build without the clockwork-sdk the program builds. When I run it with the ...
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27
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Can't realloc and SPL transfer in the same instruction
I am trying to transfer an SPL token, and reallocating space in a PDA in one instruction.
I am able to realloc (increase and decrease) if I remove the token transfer code in the instruction. I'm also ...
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1
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25
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having trouble to encode a u64 as data for CPI
I have a u64 which is an amount of lamports.
I need to send it to another program with a CPI.
So i'm trying to encode it in the data, but can't figure out how to do it.
Here is what i tried:
let mut ...
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votes
1
answer
44
views
anchor: how to init a PDA and close it in the same method?
I would like to create a PDA and close it in the same method, but can't find how.
if i use init and close, it says i should add mut, but if i add mut, it says it can't be used with init.
Why do i need ...
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2
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41
views
Are enums with associated values permitted?
Not sure if this is really an anchor or solana related question, since I am able to compile, just not to run tests.
I can run code and test against code that has an account that has following enum:
#[...
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BN inside object
I'm trying to send a BN to a Solana Program, but the account it's never set as intended. When the BN is sent as an another independent argument works fine.
const created_at = new BN(Date.now());
...
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21
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Use candy machine in anchor program
Are there examples of calling candy machine and candy guard prgoram from an anchor program?
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Using u128 without sacrificing alignment 8
We have a struct like:
#[account(zero_copy)]
#[repr(C)]
pub struct SomeStruct {
pub authority: Pubkey,
pub some_value: u128,
pub another_value: u64,
// etc...
}
This struct has alignment ...
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3
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54
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Is my transaction to big?
I am creating a transaction with these contexts. when I remove an account, (does not matter which one) I am able to make the transaction but whenever I have all of them it fails with the error: failed ...
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0
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14
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anchor's instruction create account but with CPI?
i have created an anchor method that needs an escrow account. When i use this method, the escrow account is created with instructions: [ await program.account.escrowAccount.createInstruction(escrow), ]...
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37
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Why does the token metadata program have an account discriminator field?
The first field for the MetadataAccount struct is key which is commented as being the account discriminator.
What is MPL token metadata using this field for?
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what is the name of the second parameter for `CpiContext`
For example, when calling the instruction to mint_to my wallet,
I initialize the cpi_context
let cpi_context = CpiContext::new(
ctx.accounts.token_program.to_account_info(),
...
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67
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How to organize program's anchor code properly
I have a program with around 10/15 methods, all in the same file which represents 2K lines of code +/-.
I would like to have one file with the method pub fn my_method and the struct #[derive(Accounts)]...
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A peculiar problem with CPIs
So I'm working on a DAO program and I ran into this really weird error. My program is bespoke, so I'm going to demonstrate the problem with an easier-to-understand program: coral-xyz/multisig. The ...
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Error on building sdk with solita on anchor-lang:0.28.0
No matching version is found by solita for anchor-cli: 0.28.0 on https://crates.io/crates/anchor-cli/versions , which gives error.
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