Moonshot decoder

carbon-moonshot-decoder decodes the instructions, accounts and events of the Moonshot program (MoonCVVNZFSYkqNXP6bxHLPL6QQJiMagDL3qcqUQTrG): 6 instructions, 2 account types, 2 events. It is generated with Codama from the program's IDL; see decoders for how decoders plug into a pipeline.

Other launchpad decoders: Boop, Meteora DBC, Pump.fun, Raydium Launchpad, Vertigo, Virtuals, Wavebreak. To decode several in one pipeline, see launchpad decoders.

The serde feature derives Serialize/Deserialize on every type, postgres adds tables and processors for Postgres, and graphql adds a schema for the GraphQL server.

Usage#

This program crawls recent Moonshot transactions from the public RPC and prints every decoded Buy instruction. Add the dependencies:

cargo add carbon-core@2.0.0 carbon-moonshot-decoder@2.0.0 carbon-rpc-transaction-crawler-datasource@2.0.0 carbon-log-metrics@2.0.0 env_logger tokio --features tokio/full

use {
    carbon_core::{
        error::CarbonResult, instruction::InstructionProcessorInputType, pipeline::Pipeline,
        processor::Processor,
    },
    carbon_log_metrics::LogMetrics,
    carbon_moonshot_decoder::{instructions::MoonshotInstruction, MoonshotDecoder, PROGRAM_ID},
    carbon_rpc_transaction_crawler_datasource::{ConnectionConfig, Filters, RpcTransactionCrawler},
    std::sync::Arc,
};

#[tokio::main]
async fn main() -> CarbonResult<()> {
    env_logger::init();

    // Fetches the program's recent transactions over JSON-RPC, newest first.
    let datasource = RpcTransactionCrawler::new(
        "https://api.mainnet-beta.solana.com".to_string(),
        PROGRAM_ID,
        ConnectionConfig::default(),
        Filters::new(None, None, None),
        None,
    );

    Pipeline::builder()
        .datasource(datasource)
        .metrics(Arc::new(LogMetrics::new()))
        .instruction(MoonshotDecoder, InstructionLogger)
        .build()?
        .run()
        .await
}

struct InstructionLogger;

impl Processor<InstructionProcessorInputType<'_, MoonshotInstruction>> for InstructionLogger {
    async fn process(
        &mut self,
        input: &InstructionProcessorInputType<'_, MoonshotInstruction>,
    ) -> CarbonResult<()> {
        let signature = input.metadata.transaction_metadata.signature;
        if let MoonshotInstruction::Buy { data, accounts, .. } = input.decoded_instruction {
            println!("buy {signature}: {data:?} sender={}", accounts.sender);
        }
        Ok(())
    }
}

RUST_LOG=info cargo run

Each Buy instruction prints one line with the transaction signature and the decoded Buy data. The public endpoint rate-limits requests, so the first lines can take a while; use your own RPC URL for anything beyond a test. See stream with RPC for the crawler options.

Events published with Anchor's emit_cpi! arrive as the CpiEvent instruction. Match them with MoonshotInstruction::CpiEvent { data: CpiEvent::TradeEvent(event), .. } (import instructions::CpiEvent); see Events. If CpiEvent never arrives, the program logs its events with emit! instead: decode them with decode_log_events.

Decode accounts#

The transaction crawler emits transactions only. To decode accounts, use a datasource that emits account updates. This program subscribes to the program's accounts with programSubscribe on the public WebSocket endpoint and prints every decoded ConfigAccount account as it changes. Add the datasource and the Solana RPC types it takes:

cargo add carbon-rpc-program-subscribe-datasource@2.0.0 solana-client@4.2.2

use {
    carbon_core::{
        account::AccountProcessorInputType, error::CarbonResult, pipeline::Pipeline,
        processor::Processor,
    },
    carbon_log_metrics::LogMetrics,
    carbon_moonshot_decoder::{accounts::MoonshotAccount, MoonshotDecoder, PROGRAM_ID},
    carbon_rpc_program_subscribe_datasource::{Filters, RpcProgramSubscribe},
    solana_client::rpc_config::{RpcAccountInfoConfig, RpcProgramAccountsConfig, UiAccountEncoding},
    std::sync::Arc,
};

#[tokio::main]
async fn main() -> CarbonResult<()> {
    env_logger::init();

    // Streams every change to an account owned by the program (programSubscribe).
    let config = RpcProgramAccountsConfig {
        account_config: RpcAccountInfoConfig {
            encoding: Some(UiAccountEncoding::Base64),
            ..Default::default()
        },
        ..Default::default()
    };
    let datasource = RpcProgramSubscribe::new(
        "wss://api.mainnet-beta.solana.com".to_string(),
        Filters::new(PROGRAM_ID, Some(config)),
    );

    Pipeline::builder()
        .datasource(datasource)
        .metrics(Arc::new(LogMetrics::new()))
        .account(MoonshotDecoder, AccountLogger)
        .build()?
        .run()
        .await
}

struct AccountLogger;

impl Processor<AccountProcessorInputType<'_, MoonshotAccount>> for AccountLogger {
    async fn process(
        &mut self,
        input: &AccountProcessorInputType<'_, MoonshotAccount>,
    ) -> CarbonResult<()> {
        if let MoonshotAccount::ConfigAccount(config_account) = &input.decoded_account.data {
            println!("config_account {}: {config_account:?}", input.metadata.pubkey);
        }
        Ok(())
    }
}

RUST_LOG=info cargo run

Each update to a ConfigAccount account prints its address and decoded fields; the program runs until you stop it. Cargo resolves solana-client to 4.2.2, the exact version the datasource pins, so both use the same RpcProgramAccountsConfig type. To load every existing account once instead of streaming changes, see load account state.

Instructions#

Variants of MoonshotInstruction. Each is MoonshotInstruction::<Variant> { program_id, data, accounts }, where data and accounts are the types listed under the variant, exported from carbon_moonshot_decoder::instructions. Discriminators are the leading bytes of the instruction data, in hex.

How an instruction decodes. The decoder returns a variant only when all of these hold; otherwise the instruction is skipped and no processor is called:

1. The instruction's program ID is MoonCVVNZFSYkqNXP6bxHLPL6QQJiMagDL3qcqUQTrG.
2. The data starts with the variant's discriminator, and the rest deserializes into its data type.
3. The instruction has at least as many accounts as the variant requires (the "Required accounts" count under each variant).

Accounts. They are matched by position, in the order listed. An account marked optional is None only when the instruction ends before it; Anchor programs pass the program ID as a placeholder for an omitted optional account, so check for Some(PROGRAM_ID) too. Accounts after the listed ones are in accounts.remaining as AccountMetas. The decoder doesn't record whether an account signed or was writable: read that from input.raw_instruction.accounts[i].is_signer and .is_writable, which follow the same order. It doesn't check signer, writable, owner or PDA constraints either; the program enforced those when the transaction executed, so a decoded instruction from a successful transaction already satisfied them.

Buy#

Discriminator 66063d1201daebea · data Buy · accounts BuyInstructionAccounts.

Required accounts: 11; extras go to remaining.

Fields of BuyInstructionAccounts, in account order:

ConfigInit#

Discriminator 0deca4ad6afda4b9 · data ConfigInit · accounts ConfigInitInstructionAccounts.

Required accounts: 3; extras go to remaining.

Fields of ConfigInitInstructionAccounts, in account order:

ConfigUpdate#

Discriminator 50256d88528759f1 · data ConfigUpdate · accounts ConfigUpdateInstructionAccounts.

Required accounts: 2; extras go to remaining.

Fields of ConfigUpdateInstructionAccounts, in account order:

MigrateFunds#

Discriminator 2ae50ae7bd3ec1ae · data MigrateFunds · accounts MigrateFundsInstructionAccounts.

No data fields.

Required accounts: 12; extras go to remaining.

Fields of MigrateFundsInstructionAccounts, in account order:

Sell#

Discriminator 33e685a4017f83ad · data Sell · accounts SellInstructionAccounts.

Required accounts: 11; extras go to remaining.

Fields of SellInstructionAccounts, in account order:

TokenMint#

Discriminator 032ca4b87b0df5b3 · data TokenMint · accounts TokenMintInstructionAccounts.

Required accounts: 11; extras go to remaining.

Fields of TokenMintInstructionAccounts, in account order:

CpiEvent#

Anchor self-CPI that carries one of the program's events. data is the CpiEvent enum.

Discriminator e445a52e51cb9a1d · data CpiEvent · accounts CpiEventInstructionAccounts.

Required accounts: 2; extras go to remaining.

Fields of CpiEventInstructionAccounts, in account order:

Accounts#

Variants of MoonshotAccount. Each wraps a boxed struct from carbon_moonshot_decoder::accounts::<module>. decode_account only considers accounts owned by PROGRAM_ID and returns the first variant that matches.

ConfigAccount#

Discriminator bdff6146babd1866 · accounts::config_account::ConfigAccount.

CurveAccount#

Discriminator 085b531c84d8f816 · accounts::curve_account::CurveAccount.

Events#

Variants of instructions::CpiEvent, decoded from the CpiEvent instruction. Each wraps a struct from carbon_moonshot_decoder::events::<module>. The discriminator is the 8-byte event discriminator that follows the e445a52e51cb9a1d CPI-event tag.

TradeEvent#

Discriminator bddb7fd34ee661ee · events::trade_event::TradeEventEvent.

MigrationEvent#

Discriminator ffca4c935be74916 · events::migration_event::MigrationEventEvent.

Types#

Types used by the instructions, accounts and events above, exported from carbon_moonshot_decoder::types.

ConfigParams#

Struct types::ConfigParams.

Currency#

Enum types::Currency.

CurveType#

Enum types::CurveType.

FixedSide#

Enum types::FixedSide.

MigrationEvent#

Struct types::MigrationEvent. Same fields as the MigrationEvent event.

MigrationTarget#

Enum types::MigrationTarget.

TokenMintParams#

Struct types::TokenMintParams.

TradeEvent#

Struct types::TradeEvent. Same fields as the TradeEvent event.

TradeParams#

Struct types::TradeParams.

TradeType#

Enum types::TradeType.