Skalierter UI-Betrag

Was ist die Scaled UI Amount Extension?

Die ScaledUiAmount-Mint-Erweiterung des Token Extensions Program ermöglicht es einem Mint, einen aktualisierbaren Multiplikator auf den UI-Betrag anzuwenden, der für Token-Guthaben angezeigt wird.

Dies ist nützlich, wenn ein Token einen realen Vermögenswert oder ein Finanzinstrument darstellt, wie beispielsweise einen Aktiensplit oder eine Dividende. Zum Beispiel verdoppelt ein Aktiensplit die Anzahl der Aktien für alle Inhaber. Ohne den Kontostand jedes token account zu ändern, ermöglicht ScaledUiAmount Wallets und Anwendungen, einen neuen UI-Betrag mithilfe des Multiplikators des Mints anzuzeigen.

Diese Funktion kann auch für Dividenden oder die Verteilung von Erträgen verwendet werden.

Es werden keine neuen Token erstellt. Der in den token accounts gespeicherte Token-Betrag bleibt gleich. Nur der angezeigte UI-Betrag ändert sich.

Inkompatible Erweiterung

Aktivieren Sie nicht ScaledUiAmount und InterestBearingConfig auf demselben Mint. Das Token Extensions Program lehnt diese Erweiterungskombination ab.

Wie Scaled UI Amount funktioniert

  • ScaledUiAmountConfig speichert die Upgrade-Authority, multiplier, new_multiplier und new_multiplier_effective_timestamp.
  • Vor new_multiplier_effective_timestamp verwenden Konvertierungen multiplier. Zu oder nach diesem Zeitstempel verwenden Konvertierungen new_multiplier.
  • UpdateMultiplier kann einen neuen Multiplikator sofort anwenden oder ihn für einen zukünftigen Unix-Zeitstempel planen.
  • AmountToUiAmount, UiAmountToAmount und die Konvertierungshilfen der Erweiterung verwenden Gleitkommaarithmetik für Mints mit skaliertem UI-Betrag, sodass Konvertierungen nicht garantiert exakt zurückkonvertierbar sind.

So verwenden Sie Scaled UI Amount

Um Scaled UI Amount zu verwenden:

  1. Berechnen Sie die Größe des mint account und die benötigte Miete für das Mint und die ScaledUiAmount-Erweiterung.
  2. Erstellen Sie das mint account mit CreateAccount, initialisieren Sie ScaledUiAmount und initialisieren Sie das Mint mit InitializeMint.
  3. Verwenden Sie AmountToUiAmount, UiAmountToAmount oder Client-Hilfsfunktionen beim Anzeigen von Guthaben oder Konvertieren von UI-Beträgen.
  4. Verwenden Sie UpdateMultiplier, um den angezeigten Multiplikator sofort oder zu einem zukünftigen Unix-Zeitstempel zu aktualisieren.

Reihenfolge der Anweisungen

ScaledUiAmountMintInstruction::Initialize muss vor InitializeMint erfolgen. CreateAccount, ScaledUiAmountMintInstruction::Initialize und InitializeMint müssen in derselben Transaktion enthalten sein.

Anleitungen

Quellenreferenz

ElementBeschreibungQuelle
ScaledUiAmountConfigMint-Erweiterungsstatus, der die Berechtigung, den aktuellen Multiplikator, den nächsten Multiplikator und den Zeitstempel speichert, zu dem er wirksam wird.Quelle
ScaledUiAmountMintInstruction::InitializeAnweisungen, die ScaledUiAmount auf einer Prägung vor InitializeMint initialisieren.Quelle
ScaledUiAmountMintInstruction::UpdateMultiplierAnweisungen, die einen neuen Multiplikator und den Unix-Zeitstempel festlegen, zu dem er wirksam wird.Quelle
amount_to_ui_amountHilfsfunktion, die einen Token-Betrag unter Verwendung des aktuellen Multiplikators, der Dezimalstellen und des Zeitstempels in einen UI-Betrag-String umwandelt.Quelle
try_ui_amount_into_amountHilfsfunktion, die einen UI-Betrag-String unter Verwendung des aktuellen Multiplikators, der Dezimalstellen und des Zeitstempels zurück in einen Token-Betrag umwandelt.Quelle
process_initializeProzessor, der ScaledUiAmountConfig initialisiert und den anfänglichen Multiplikator auf einer nicht initialisierten Prägung speichert.Quelle
process_update_multiplierProzessor, der die Berechtigung validiert, den geplanten Multiplikator aktualisiert und ihn gegebenenfalls sofort anwendet.Quelle
process_amount_to_ui_amountKonvertierungspfad des Token-Programms, der ScaledUiAmountConfig verwendet, wenn eine Prägung die Erweiterung aktiviert hat.Quelle
process_ui_amount_to_amountKonvertierungspfad des Token-Programms, der einen UI-Betrag zurück in einen Token-Betrag für Prägungen mit Scaled UI Amount umwandelt.Quelle

Typescript

Das folgende Kit-Beispiel verwendet die generierten Anweisungen direkt. Legacy-Beispiele mit @solana/web3.js und @solana/spl-token sind als Referenz enthalten.

Kit

Instructions
import {
lamports,
createClient,
generateKeyPairSigner,
unwrapOption
} from "@solana/kit";
import { solanaRpc, rpcAirdrop } from "@solana/kit-plugin-rpc";
import { generatedPayer, airdropPayer } from "@solana/kit-plugin-signer";
import { getCreateAccountInstruction } from "@solana-program/system";
import {
amountToUiAmountForMintWithoutSimulation,
extension,
fetchMint,
findAssociatedTokenPda,
getCreateAssociatedTokenInstructionAsync,
getInitializeMintInstruction,
getInitializeScaledUiAmountMintInstruction,
getMintSize,
getMintToCheckedInstruction,
getUpdateMultiplierScaledUiMintInstruction,
isExtension,
TOKEN_2022_PROGRAM_ADDRESS
} from "@solana-program/token-2022";
const client = await createClient()
.use(generatedPayer())
.use(
solanaRpc({
rpcUrl: "http://localhost:8899",
rpcSubscriptionsUrl: "ws://localhost:8900"
})
)
.use(rpcAirdrop())
.use(airdropPayer(lamports(1_000_000_000n)));
const mint = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();
const initialMultiplier = 5.0;
const updatedMultiplier = 10.0;
const tokenAmount = 1_000n;
const scaledUiAmountExtension = extension("ScaledUiAmountConfig", {
authority: client.payer.address,
multiplier: initialMultiplier,
newMultiplierEffectiveTimestamp: 0n,
newMultiplier: initialMultiplier
});
const mintSpace = BigInt(getMintSize([scaledUiAmountExtension]));
const mintRent = await client.rpc
.getMinimumBalanceForRentExemption(mintSpace)
.send();
await client.sendTransaction([
getCreateAccountInstruction({
payer: client.payer, // Account funding the new mint account.
newAccount: mint, // New mint account to create.
lamports: mintRent, // Lamports funding the mint account rent.
space: mintSpace, // Account size in bytes for the mint plus ScaledUiAmountConfig.
programAddress: TOKEN_2022_PROGRAM_ADDRESS // Program that owns the mint account.
}),
getInitializeScaledUiAmountMintInstruction({
mint: mint.address, // Mint account that stores the ScaledUiAmountConfig extension.
authority: client.payer.address, // Authority allowed to update the multiplier later.
multiplier: initialMultiplier // Initial multiplier used for displayed UI amounts.
}),
getInitializeMintInstruction({
mint: mint.address, // Mint account to initialize.
decimals: 0, // Number of decimals for the token.
mintAuthority: client.payer.address, // Authority allowed to mint new tokens.
freezeAuthority: client.payer.address // Authority allowed to freeze token accounts.
})
]);
const [tokenAccount] = await findAssociatedTokenPda({
mint: mint.address,
owner: recipient.address,
tokenProgram: TOKEN_2022_PROGRAM_ADDRESS
});
await client.sendTransaction([
await getCreateAssociatedTokenInstructionAsync({
payer: client.payer, // Account funding the associated token account creation.
mint: mint.address, // Mint for the associated token account.
owner: recipient.address // Owner of the token account.
}),
getMintToCheckedInstruction({
mint: mint.address, // Mint account that issues the tokens.
token: tokenAccount, // Token account receiving the newly minted tokens.
mintAuthority: client.payer, // Signer authorized to mint new tokens.
amount: tokenAmount, // Token amount in base units.
decimals: 0 // Decimals defined on the mint.
})
]);
const calculatedUiAmountBeforeUpdate =
await amountToUiAmountForMintWithoutSimulation(
client.rpc,
mint.address,
tokenAmount
);
const updateMultiplierInstruction = getUpdateMultiplierScaledUiMintInstruction({
mint: mint.address, // Mint account that stores the ScaledUiAmountConfig extension.
authority: client.payer, // Signer authorized to update the multiplier.
multiplier: updatedMultiplier, // New multiplier used for displayed UI amounts.
effectiveTimestamp: 0n // Unix timestamp when the new multiplier takes effect.
});
await client.sendTransaction([updateMultiplierInstruction]);
const calculatedUiAmountAfterUpdate =
await amountToUiAmountForMintWithoutSimulation(
client.rpc,
mint.address,
tokenAmount
);
const mintAccount = await fetchMint(client.rpc, mint.address);
const scaledUiAmountConfig = (
unwrapOption(mintAccount.data.extensions) ?? []
).find((item) => isExtension("ScaledUiAmountConfig", item));
console.log("Mint Address:", mint.address);
console.log("Token Account:", tokenAccount);
console.log(
"Calculated UI Amount Before Update:",
calculatedUiAmountBeforeUpdate
);
console.log(
"Calculated UI Amount After Update:",
calculatedUiAmountAfterUpdate
);
console.log("ScaledUiAmountConfig:", scaledUiAmountConfig);
Console
Click to execute the code.

Web3.js

Instructions
import {
Connection,
Keypair,
PublicKey,
sendAndConfirmTransaction,
SystemProgram,
Transaction,
LAMPORTS_PER_SOL
} from "@solana/web3.js";
import {
ASSOCIATED_TOKEN_PROGRAM_ID,
createAssociatedTokenAccountInstruction,
createInitializeMintInstruction,
createInitializeScaledUiAmountConfigInstruction,
createMintToCheckedInstruction,
createUpdateMultiplierDataInstruction,
ExtensionType,
getAssociatedTokenAddressSync,
getMint,
getMintLen,
getScaledUiAmountConfig,
TOKEN_2022_PROGRAM_ID
} from "@solana/spl-token";
async function calculateScaledUiAmount(
connection: Connection,
mintPublicKey: PublicKey,
tokenAmount: bigint
) {
const mintAccount = await getMint(
connection,
mintPublicKey,
"confirmed",
TOKEN_2022_PROGRAM_ID
);
const scaledUiAmountConfig = getScaledUiAmountConfig(mintAccount);
if (!scaledUiAmountConfig) {
throw new Error("ScaledUiAmountConfig not found");
}
const clockAccount = await connection.getParsedAccountInfo(
new PublicKey("SysvarC1ock11111111111111111111111111111111")
);
if (
!clockAccount.value ||
typeof clockAccount.value.data !== "object" ||
!("parsed" in clockAccount.value.data)
) {
throw new Error("Failed to fetch clock sysvar");
}
const unixTimestamp = Number(
clockAccount.value.data.parsed.info.unixTimestamp
);
const multiplier =
unixTimestamp >=
Number(scaledUiAmountConfig.newMultiplierEffectiveTimestamp)
? scaledUiAmountConfig.newMultiplier
: scaledUiAmountConfig.multiplier;
const scaledAmount = Math.trunc(Number(tokenAmount) * multiplier);
const calculatedUiAmount = scaledAmount / 10 ** mintAccount.decimals;
return {
calculatedUiAmount: calculatedUiAmount.toString(),
scaledUiAmountConfig
};
}
const connection = new Connection("http://localhost:8899", "confirmed");
const feePayer = Keypair.generate();
const recipient = Keypair.generate();
const initialMultiplier = 5.0;
const updatedMultiplier = 10.0;
const tokenAmount = 1_000n;
const airdropSignature = await connection.requestAirdrop(
feePayer.publicKey,
2 * LAMPORTS_PER_SOL
);
await connection.confirmTransaction(airdropSignature, "confirmed");
const mint = Keypair.generate();
const mintLength = getMintLen([ExtensionType.ScaledUiAmountConfig]);
const mintRent = await connection.getMinimumBalanceForRentExemption(mintLength);
const tokenAccount = getAssociatedTokenAddressSync(
mint.publicKey,
recipient.publicKey,
false,
TOKEN_2022_PROGRAM_ID,
ASSOCIATED_TOKEN_PROGRAM_ID
);
const createMintAccountInstruction = SystemProgram.createAccount({
fromPubkey: feePayer.publicKey, // Account funding the new mint account.
newAccountPubkey: mint.publicKey, // New mint account to create.
space: mintLength, // Account size in bytes for the mint plus ScaledUiAmountConfig.
lamports: mintRent, // Lamports funding the mint account rent.
programId: TOKEN_2022_PROGRAM_ID // Program that owns the mint account.
});
const initializeScaledUiAmountInstruction =
createInitializeScaledUiAmountConfigInstruction(
mint.publicKey, // Mint account that stores the ScaledUiAmountConfig extension.
feePayer.publicKey, // Authority allowed to update the multiplier later.
initialMultiplier, // Initial multiplier used for displayed UI amounts.
TOKEN_2022_PROGRAM_ID // Token program that owns the mint.
);
const initializeMintInstruction = createInitializeMintInstruction(
mint.publicKey, // Mint account to initialize.
0, // Number of decimals for the token.
feePayer.publicKey, // Authority allowed to mint new tokens.
feePayer.publicKey, // Authority allowed to freeze token accounts.
TOKEN_2022_PROGRAM_ID // Program that owns the mint account.
);
await sendAndConfirmTransaction(
connection,
new Transaction().add(
createMintAccountInstruction,
initializeScaledUiAmountInstruction,
initializeMintInstruction
),
[feePayer, mint]
);
const createTokenAccountInstruction = createAssociatedTokenAccountInstruction(
feePayer.publicKey, // Account funding the associated token account creation.
tokenAccount, // Associated token account address to create.
recipient.publicKey, // Owner of the token account.
mint.publicKey, // Mint for the associated token account.
TOKEN_2022_PROGRAM_ID, // Token program that owns the token account.
ASSOCIATED_TOKEN_PROGRAM_ID // Associated Token Program that creates the account.
);
const mintToTokenAccountInstruction = createMintToCheckedInstruction(
mint.publicKey, // Mint account that issues the tokens.
tokenAccount, // Token account receiving the newly minted tokens.
feePayer.publicKey, // Signer authorized to mint new tokens.
tokenAmount, // Token amount in base units.
0, // Decimals defined on the mint.
[], // Additional multisig signers.
TOKEN_2022_PROGRAM_ID // Token program that owns the mint and token account.
);
await sendAndConfirmTransaction(
connection,
new Transaction().add(
createTokenAccountInstruction,
mintToTokenAccountInstruction
),
[feePayer]
);
const { calculatedUiAmount: calculatedUiAmountBeforeUpdate } =
await calculateScaledUiAmount(connection, mint.publicKey, tokenAmount);
const updateMultiplierInstruction = createUpdateMultiplierDataInstruction(
mint.publicKey, // Mint account that stores the ScaledUiAmountConfig extension.
feePayer.publicKey, // Signer authorized to update the multiplier.
updatedMultiplier, // New multiplier used for displayed UI amounts.
0n, // Unix timestamp when the new multiplier takes effect.
[], // Additional multisig signers.
TOKEN_2022_PROGRAM_ID // Token program that owns the mint.
);
await sendAndConfirmTransaction(
connection,
new Transaction().add(updateMultiplierInstruction),
[feePayer]
);
const {
calculatedUiAmount: calculatedUiAmountAfterUpdate,
scaledUiAmountConfig
} = await calculateScaledUiAmount(connection, mint.publicKey, tokenAmount);
console.log("Mint Address:", mint.publicKey.toBase58());
console.log("Token Account:", tokenAccount.toBase58());
console.log(
"Calculated UI Amount Before Update:",
calculatedUiAmountBeforeUpdate
);
console.log(
"Calculated UI Amount After Update:",
calculatedUiAmountAfterUpdate
);
console.log("ScaledUiAmountConfig:", scaledUiAmountConfig);
Console
Click to execute the code.

Rust

Rust
use anyhow::Result;
use solana_client::nonblocking::rpc_client::RpcClient;
use solana_commitment_config::CommitmentConfig;
use solana_sdk::{
sysvar::clock::{self, Clock},
signature::{Keypair, Signer},
transaction::Transaction,
};
use solana_system_interface::instruction::create_account;
use spl_associated_token_account_interface::{
address::get_associated_token_address_with_program_id,
instruction::create_associated_token_account,
};
use spl_token_2022_interface::{
extension::{
scaled_ui_amount::{instruction, ScaledUiAmountConfig},
BaseStateWithExtensions, ExtensionType, StateWithExtensions,
},
instruction::{initialize_mint, mint_to_checked},
state::Mint,
ID as TOKEN_2022_PROGRAM_ID,
};
#[tokio::main]
async fn main() -> Result<()> {
let client = RpcClient::new_with_commitment(
String::from("http://localhost:8899"),
CommitmentConfig::confirmed(),
);
let fee_payer = Keypair::new();
let recipient = Keypair::new();
let initial_multiplier = 5.0;
let updated_multiplier = 10.0;
let token_amount = 1_000u64;
let airdrop_signature = client
.request_airdrop(&fee_payer.pubkey(), 2_000_000_000)
.await?;
loop {
let confirmed = client.confirm_transaction(&airdrop_signature).await?;
if confirmed {
break;
}
}
let mint = Keypair::new();
let mint_space =
ExtensionType::try_calculate_account_len::<Mint>(&[ExtensionType::ScaledUiAmount])?;
let mint_rent = client
.get_minimum_balance_for_rent_exemption(mint_space)
.await?;
let create_mint_account_instruction = create_account(
&fee_payer.pubkey(), // Account funding the new mint account.
&mint.pubkey(), // New mint account to create.
mint_rent, // Lamports funding the mint account rent.
mint_space as u64, // Account size in bytes for the mint plus ScaledUiAmountConfig.
&TOKEN_2022_PROGRAM_ID, // Program that owns the mint account.
);
let initialize_scaled_ui_amount_instruction = instruction::initialize(
&TOKEN_2022_PROGRAM_ID, // Token program that owns the mint.
&mint.pubkey(), // Mint account that stores the ScaledUiAmountConfig extension.
Some(fee_payer.pubkey()), // Authority allowed to update the multiplier later.
initial_multiplier, // Initial multiplier used for displayed UI amounts.
)?;
let initialize_mint_instruction = initialize_mint(
&TOKEN_2022_PROGRAM_ID, // Program that owns the mint account.
&mint.pubkey(), // Mint account to initialize.
&fee_payer.pubkey(), // Authority allowed to mint new tokens.
Some(&fee_payer.pubkey()), // Authority allowed to freeze token accounts.
0, // Number of decimals for the token.
)?;
let create_mint_transaction = Transaction::new_signed_with_payer(
&[
create_mint_account_instruction,
initialize_scaled_ui_amount_instruction,
initialize_mint_instruction,
],
Some(&fee_payer.pubkey()),
&[&fee_payer, &mint],
client.get_latest_blockhash().await?,
);
client
.send_and_confirm_transaction(&create_mint_transaction)
.await?;
let token_account = get_associated_token_address_with_program_id(
&recipient.pubkey(),
&mint.pubkey(),
&TOKEN_2022_PROGRAM_ID,
);
let create_token_account_instruction = create_associated_token_account(
&fee_payer.pubkey(), // Account funding the associated token account creation.
&recipient.pubkey(), // Owner of the token account.
&mint.pubkey(), // Mint for the associated token account.
&TOKEN_2022_PROGRAM_ID, // Token program that owns the token account.
);
let mint_to_token_account_instruction = mint_to_checked(
&TOKEN_2022_PROGRAM_ID, // Token program that owns the mint and token account.
&mint.pubkey(), // Mint account that issues the tokens.
&token_account, // Token account receiving the newly minted tokens.
&fee_payer.pubkey(), // Signer authorized to mint new tokens.
&[], // Additional multisig signers.
token_amount, // Token amount in base units.
0, // Decimals defined on the mint.
)?;
let create_token_account_transaction = Transaction::new_signed_with_payer(
&[
create_token_account_instruction,
mint_to_token_account_instruction,
],
Some(&fee_payer.pubkey()),
&[&fee_payer],
client.get_latest_blockhash().await?,
);
client
.send_and_confirm_transaction(&create_token_account_transaction)
.await?;
let mint_account_before_update = client.get_account(&mint.pubkey()).await?;
let mint_state_before_update = StateWithExtensions::<Mint>::unpack(&mint_account_before_update.data)?;
let scaled_ui_amount_config_before_update =
mint_state_before_update.get_extension::<ScaledUiAmountConfig>()?;
let clock_account = client.get_account(&clock::ID).await?;
let clock: Clock = clock_account.deserialize_data()?;
let calculated_ui_amount_before_update = scaled_ui_amount_config_before_update
.amount_to_ui_amount(
token_amount,
mint_state_before_update.base.decimals,
clock.unix_timestamp,
)
.unwrap();
let update_multiplier_instruction = instruction::update_multiplier(
&TOKEN_2022_PROGRAM_ID, // Token program that owns the mint.
&mint.pubkey(), // Mint account that stores the ScaledUiAmountConfig extension.
&fee_payer.pubkey(), // Signer authorized to update the multiplier.
&[], // Additional multisig signers.
updated_multiplier, // New multiplier used for displayed UI amounts.
0, // Unix timestamp when the new multiplier takes effect.
)?;
let update_multiplier_transaction = Transaction::new_signed_with_payer(
&[update_multiplier_instruction],
Some(&fee_payer.pubkey()),
&[&fee_payer],
client.get_latest_blockhash().await?,
);
client
.send_and_confirm_transaction(&update_multiplier_transaction)
.await?;
let mint_account_after_update = client.get_account(&mint.pubkey()).await?;
let mint_state_after_update = StateWithExtensions::<Mint>::unpack(&mint_account_after_update.data)?;
let scaled_ui_amount_config_after_update =
mint_state_after_update.get_extension::<ScaledUiAmountConfig>()?;
let calculated_ui_amount_after_update = scaled_ui_amount_config_after_update
.amount_to_ui_amount(
token_amount,
mint_state_after_update.base.decimals,
clock.unix_timestamp,
)
.unwrap();
println!("Mint Address: {}", mint.pubkey());
println!("Token Account: {}", token_account);
println!(
"Calculated UI Amount Before Update: {}",
calculated_ui_amount_before_update
);
println!(
"Calculated UI Amount After Update: {}",
calculated_ui_amount_after_update
);
println!("ScaledUiAmountConfig: {:#?}", scaled_ui_amount_config_after_update);
Ok(())
}
Console
Click to execute the code.

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