Nosana Pools

The Nosana Pools program allows users to open token pools with predefined emission rates.

Program Information

Info	Description
Type	Solana Program
Source Code	GitHub
Build Status	Anchor Verified
Accounts	2
Instructions	5
Types	1
Errors	5
Domain	nosana-pools.sol
Address	nosPdZrfDzND1LAR28FLMDEATUPK53K8xbRBXAirevD

Instructions

A number of 5 instruction are defined in the Nosana Pools program.

To load the program with Anchor.

const programId = new PublicKey('nosPdZrfDzND1LAR28FLMDEATUPK53K8xbRBXAirevD');
const idl = await Program.fetchIdl(programId.toString());
const program = new Program(idl, programId);

Open

Open a PoolAccount and VaultAccount.

Account Info

The following 8 account addresses should be provided when invoking this instruction.

Name	Type	Description
pool		The PoolAccount address.
vault		The VaultAccount address.
beneficiary		The token account that will receive the emissions from the Pool.
authority		The signing authority of the program invocation.
mint		The token Mint address for this instruction.
systemProgram		The official Solana system program address. Responsible for system CPIs.
tokenProgram		The official SPL Token Program address. Responsible for token CPIs.
rent		The official Solana rent address. Responsible for lamports.

Arguments

The following 4 arguments should also be provided when invoking this instruction.

Name	Type	Size	Offset	Description
emission	u64	8	0	The emission rate for the pool, per second.
startTime	i64	16	8	The unix time the pool opens.
claimType	u8	1	24	The ClaimType for this pool.
closeable	bool	1	25	Whether the pool should be closable or not.

Solana Dispatch ID

The Solana dispatch ID for the Open Instruction is e4dc9b47c7bd3c2d, which can also be expressed as an 8 byte discriminator:

[228,220,155,71,199,189,60,45]

Example with Anchor

To invoke the Open Instruction with Anchor TS.

let tx = await program.methods
  .open(
    emission,          // type: u64
    startTime,         // type: i64
    claimType,         // type: u8
    closeable,         // type: bool
  )
  .accounts({
    pool,              // ✓ writable, ✓ signer
    vault,             // ✓ writable, 𐄂 signer
    beneficiary,       // 𐄂 writable, 𐄂 signer
    authority,         // ✓ writable, ✓ signer
    mint,              // 𐄂 writable, 𐄂 signer
    systemProgram,     // 𐄂 writable, 𐄂 signer
    tokenProgram,      // 𐄂 writable, 𐄂 signer
    rent,              // 𐄂 writable, 𐄂 signer
  })
  .signers([poolKey, authorityKey])
  .rpc();

Accounts

A number of 2 accounts make up for the Nosana Pools Program's state.

Pool Account

The PoolAccount struct holds all the information for any given pool. The total size of this account is 139 bytes.

Name	Type	Size	Offset	Description
authority	publicKey	32	8	The signing authority of the program invocation.
beneficiary	publicKey	32	40	The token account that will receive the emissions from the Pool.
claimType	u8	1	72	The ClaimType for this pool.
claimedTokens	u64	8	73	The number of tokens that have been claimed.
closeable	bool	1	81	Whether the pool should be closable or not.
emission	u64	8	82	The emission rate for the pool, per second.
startTime	i64	16	90	The unix time the pool opens.
vault	publicKey	32	106	The VaultAccount address.
vaultBump	u8	1	138	The bump for the VaultAccount.

Anchor Account Discriminator

The first 8 bytes, also known as Anchor's 8 byte discriminator, for the Pool Account are 74d2bb77c4c43489, which can also be expressed in byte array:

[116,210,187,119,196,196,52,137]

Types

A number of 1 type variants are defined in the Nosana Pools Program's state.

Claim Type

The ClaimType of any pool describes the way withdraw (claim) works.

A number of 3 variants are defined in this enum:

Name	Number
Transfer	0
AddFee	1
Unknown	255

Errors

A number of 5 errors are defined in the Nosana Pools Program.

Diagram