14
votes
Accepted
How can I increase an existing account size?
You can do this in Anchor with realloc* constraints.
#[derive(Accounts)]
pub struct Example {
#[account(mut)]
pub payer: Signer<'info>,
#[account(
mut,
seeds = [b&...
- 1,851
10
votes
Accepted
Is there a way to resize an account's data field?
From the anchor lang 25.0 docs, they have implemented the realloc constraint to give you access to the new functionality of resizing accounts. This functionality is particularly relevant for PDAs ...
- 2,949
4
votes
Accepted
How can I determine a current size of Solana blockchain
This depends on your definition of what data is part of the blockchain and on your method to calculate that size.
Data Categories
Accounts, persistent data entries that programs own and access. Every ...
- 463
3
votes
What is the recommended way to calculate a account size, using sizeof or manually calculating it
For zero_copy accounts, you can use mem::size_of(). But for non-zero_copy accounts, the alignment is off and size_of() will give you a larger, incorrect space value. Instead you can do
let acc = ...
- 146
2
votes
Accepted
How to allot 1 bit space for boolean in Anchor program?
You can't - Solana charges rent in lamports per byte-year, meaning the minimum amount of storage you can rent is one byte anyway. More info on rent can be found here.
Additionally, even if you could, ...
- 5,384
2
votes
How to have PDA space size depending on instruction argument
Found out you can use the #[instruction] macro, to use the args you're waiting for.
Also the anchor docs says that the space needed for a String is 4 + length of string in bytes.
So i'd do something ...
2
votes
Accepted
Trait bound EnumStatus: anchor_lang::Space is not satisfied for Enum
You just need to add InitSpace to EnumStatus derives.
- #[derive(AnchorSerialize, AnchorDeserialize, Clone, Copy, Debug, Eq, PartialEq)]
+ #[derive(InitSpace, AnchorSerialize, AnchorDeserialize, Clone,...
- 349
1
vote
How to Calculate Space for PDA Accounts with Dynamic Vectors in Solana?
Are there any best practices for handling PDA accounts with dynamic data like vectors
Best practice is don't do it. If you MUST have dynamically sized storage for whatever reason, use a statically ...
- 3,597
1
vote
How to Calculate Space for PDA Accounts with Dynamic Vectors in Solana?
To answer your questions....
You'll need to just put some amount that you want to allocate at the start. Using std::mem::size_of will be incorrect, since it'll give you the stack space for a Vec, ...
- 19.6k
1
vote
Accepted
How to calculate size of Option<String> for Anchor accounts
Hey there to calculate the size of an Option< String > when initializing an account in Anchor, you need to consider the size of the Option itself, which is always 1 byte, plus the size of the ...
1
vote
Accepted
How to calculate space for an account dynamically using remaining_accounts
Should I just send the length of remaining_accounts as instruction data?
This is the only way to do it, and then use that instruction data in the context macros with
#[instruction(...)]
The Context&...
- 909
1
vote
Managing Space in the Zero Account
You can initialize it like this:
#[account(init, payer=payer, space = 40 , seeds = [b"seeds".as_ref()], bump)]
account_pda: Account<'info, AccountStruct>
#[account]
#[derive(...
- 375
Only top scored, non community-wiki answers of a minimum length are eligible