This commit is contained in:
2026-04-28 20:03:57 +02:00
parent d036b4c79f
commit 574f90ddee
8 changed files with 1367 additions and 19 deletions

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// file: kb_lib/src/dex/meteora_dbc.rs
//! Meteora Dynamic Bonding Curve (DBC) transaction decoder.
/// Meteora DBC program id.
pub const KB_METEORA_DBC_PROGRAM_ID: &str = "dbcij3LWUppWqq96dh6gJWwBifmcGfLSB5D4DuSMaqN";
/// Decoded Meteora DBC create-pool event.
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
pub struct KbMeteoraDbcCreatePoolDecoded {
/// Parent transaction id.
pub transaction_id: i64,
/// Parent instruction id.
pub instruction_id: i64,
/// Transaction signature.
pub signature: std::string::String,
/// Program id.
pub program_id: std::string::String,
/// Optional pool account.
pub pool_account: std::option::Option<std::string::String>,
/// Optional base mint.
pub token_a_mint: std::option::Option<std::string::String>,
/// Optional quote mint.
pub token_b_mint: std::option::Option<std::string::String>,
/// Optional config account.
pub config_account: std::option::Option<std::string::String>,
/// Optional creator.
pub creator: std::option::Option<std::string::String>,
/// Decoded payload.
pub payload_json: serde_json::Value,
}
/// Decoded Meteora DBC swap event.
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
pub struct KbMeteoraDbcSwapDecoded {
/// Parent transaction id.
pub transaction_id: i64,
/// Parent instruction id.
pub instruction_id: i64,
/// Transaction signature.
pub signature: std::string::String,
/// Program id.
pub program_id: std::string::String,
/// Trade side relative to normalized base.
pub trade_side: crate::KbSwapTradeSide,
/// Optional pool account.
pub pool_account: std::option::Option<std::string::String>,
/// Optional base mint.
pub token_a_mint: std::option::Option<std::string::String>,
/// Optional quote mint.
pub token_b_mint: std::option::Option<std::string::String>,
/// Decoded payload.
pub payload_json: serde_json::Value,
}
/// Decoded Meteora DBC event.
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
pub enum KbMeteoraDbcDecodedEvent {
/// Create pool / launch pool.
CreatePool(KbMeteoraDbcCreatePoolDecoded),
/// Swap / swap2.
Swap(KbMeteoraDbcSwapDecoded),
}
/// Meteora DBC decoder.
#[derive(Debug, Clone, Default)]
pub struct KbMeteoraDbcDecoder;
impl KbMeteoraDbcDecoder {
/// Creates a new decoder.
pub fn new() -> Self {
Self
}
/// Decodes one projected transaction into zero or more Meteora DBC events.
pub fn decode_transaction(
&self,
transaction: &crate::KbChainTransactionDto,
instructions: &[crate::KbChainInstructionDto],
) -> Result<std::vec::Vec<crate::KbMeteoraDbcDecodedEvent>, crate::KbError> {
let transaction_id_option = transaction.id;
let transaction_id = match transaction_id_option {
Some(transaction_id) => transaction_id,
None => {
return Err(crate::KbError::InvalidState(format!(
"chain transaction '{}' has no internal id",
transaction.signature
)));
}
};
let transaction_json_result =
serde_json::from_str::<serde_json::Value>(transaction.transaction_json.as_str());
let transaction_json = match transaction_json_result {
Ok(transaction_json) => transaction_json,
Err(error) => {
return Err(crate::KbError::Json(format!(
"cannot parse transaction_json for signature '{}': {}",
transaction.signature, error
)));
}
};
let log_messages = kb_extract_log_messages(&transaction_json);
let mut decoded_events = std::vec::Vec::new();
for instruction in instructions {
if instruction.parent_instruction_id.is_some() {
continue;
}
let program_id_option = &instruction.program_id;
let program_id = match program_id_option {
Some(program_id) => program_id,
None => continue,
};
if program_id.as_str() != crate::KB_METEORA_DBC_PROGRAM_ID {
continue;
}
let instruction_id_option = instruction.id;
let instruction_id = match instruction_id_option {
Some(instruction_id) => instruction_id,
None => continue,
};
let accounts_result = kb_parse_accounts_json(instruction.accounts_json.as_str());
let accounts = match accounts_result {
Ok(accounts) => accounts,
Err(error) => return Err(error),
};
let parsed_json_result =
kb_parse_optional_parsed_json(instruction.parsed_json.as_ref());
let parsed_json = match parsed_json_result {
Ok(parsed_json) => parsed_json,
Err(error) => return Err(error),
};
let is_create_pool = kb_log_messages_contain_any_keyword(
&log_messages,
&[
"create_pool",
"createpool",
"initialize_pool",
"initializepool",
"launch_pool",
],
) || kb_value_contains_any_key(
parsed_json.as_ref(),
&[
"poolConfig",
"migrationQuoteThreshold",
"curveConfig",
"dbcConfig",
],
);
let is_swap = kb_log_messages_contain_any_keyword(&log_messages, &["swap2", "swap"]);
let pool_account = kb_extract_string_by_candidate_keys(
parsed_json.as_ref(),
&["pool", "poolAccount", "poolState", "virtualPool", "poolKey"],
)
.or_else(|| kb_extract_account(&accounts, 0));
let token_a_mint = kb_extract_string_by_candidate_keys(
parsed_json.as_ref(),
&["baseMint", "tokenAMint", "mintA", "token0Mint", "mint0"],
)
.or_else(|| kb_extract_account(&accounts, 1));
let token_b_mint = kb_extract_string_by_candidate_keys(
parsed_json.as_ref(),
&["quoteMint", "tokenBMint", "mintB", "token1Mint", "mint1"],
)
.or_else(|| kb_extract_account(&accounts, 2));
let config_account = kb_extract_string_by_candidate_keys(
parsed_json.as_ref(),
&["poolConfig", "config", "dbcConfig", "curveConfig"],
)
.or_else(|| kb_extract_account(&accounts, 3));
let creator = kb_extract_string_by_candidate_keys(
parsed_json.as_ref(),
&["creator", "poolCreator", "owner", "user"],
)
.or_else(|| kb_extract_account(&accounts, 4));
if is_create_pool {
let payload_json = serde_json::json!({
"decoder": "meteora_dbc",
"eventKind": "create_pool",
"signature": transaction.signature,
"instructionId": instruction_id,
"instructionIndex": instruction.instruction_index,
"accounts": accounts,
"parsed": parsed_json,
"logMessages": log_messages,
"poolAccount": pool_account,
"tokenAMint": token_a_mint,
"tokenBMint": token_b_mint,
"configAccount": config_account,
"creator": creator
});
decoded_events.push(crate::KbMeteoraDbcDecodedEvent::CreatePool(
crate::KbMeteoraDbcCreatePoolDecoded {
transaction_id,
instruction_id,
signature: transaction.signature.clone(),
program_id: program_id.clone(),
pool_account,
token_a_mint,
token_b_mint,
config_account,
creator,
payload_json,
},
));
continue;
}
if is_swap {
let trade_side = kb_infer_trade_side(&log_messages);
let payload_json = serde_json::json!({
"decoder": "meteora_dbc",
"eventKind": "swap",
"signature": transaction.signature,
"instructionId": instruction_id,
"instructionIndex": instruction.instruction_index,
"accounts": accounts,
"parsed": parsed_json,
"logMessages": log_messages,
"poolAccount": pool_account,
"tokenAMint": token_a_mint,
"tokenBMint": token_b_mint,
"tradeSide": format!("{:?}", trade_side)
});
decoded_events.push(crate::KbMeteoraDbcDecodedEvent::Swap(
crate::KbMeteoraDbcSwapDecoded {
transaction_id,
instruction_id,
signature: transaction.signature.clone(),
program_id: program_id.clone(),
trade_side,
pool_account,
token_a_mint,
token_b_mint,
payload_json,
},
));
}
}
Ok(decoded_events)
}
}
fn kb_extract_log_messages(
transaction_json: &serde_json::Value,
) -> std::vec::Vec<std::string::String> {
let mut messages = std::vec::Vec::new();
let meta_option = transaction_json.get("meta");
let meta = match meta_option {
Some(meta) => meta,
None => return messages,
};
let logs_option = meta.get("logMessages");
let logs = match logs_option {
Some(logs) => logs,
None => return messages,
};
let logs_array_option = logs.as_array();
let logs_array = match logs_array_option {
Some(logs_array) => logs_array,
None => return messages,
};
for value in logs_array {
let text_option = value.as_str();
if let Some(text) = text_option {
messages.push(text.to_string());
}
}
messages
}
fn kb_log_messages_contain_any_keyword(
log_messages: &[std::string::String],
keywords: &[&str],
) -> bool {
for keyword in keywords {
if kb_log_messages_contain_keyword(log_messages, keyword) {
return true;
}
}
false
}
fn kb_log_messages_contain_keyword(log_messages: &[std::string::String], keyword: &str) -> bool {
let keyword_normalized = kb_normalize_log_text(keyword);
for log_message in log_messages {
let log_normalized = kb_normalize_log_text(log_message.as_str());
if log_normalized.contains(keyword_normalized.as_str()) {
return true;
}
}
false
}
fn kb_normalize_log_text(value: &str) -> std::string::String {
let mut normalized = std::string::String::new();
for character in value.chars() {
if character.is_ascii_alphanumeric() {
normalized.push(character.to_ascii_lowercase());
}
}
normalized
}
fn kb_parse_accounts_json(
accounts_json: &str,
) -> Result<std::vec::Vec<std::string::String>, crate::KbError> {
let values_result = serde_json::from_str::<std::vec::Vec<serde_json::Value>>(accounts_json);
let values = match values_result {
Ok(values) => values,
Err(error) => {
return Err(crate::KbError::Json(format!(
"cannot parse instruction accounts_json '{}': {}",
accounts_json, error
)));
}
};
let mut accounts = std::vec::Vec::new();
for value in values {
let text_option = value.as_str();
if let Some(text) = text_option {
accounts.push(text.to_string());
}
}
Ok(accounts)
}
fn kb_parse_optional_parsed_json(
parsed_json: std::option::Option<&std::string::String>,
) -> Result<std::option::Option<serde_json::Value>, crate::KbError> {
let parsed_json = match parsed_json {
Some(parsed_json) => parsed_json,
None => return Ok(None),
};
let value_result = serde_json::from_str::<serde_json::Value>(parsed_json.as_str());
match value_result {
Ok(value) => Ok(Some(value)),
Err(error) => Err(crate::KbError::Json(format!(
"cannot parse instruction parsed_json '{}': {}",
parsed_json, error
))),
}
}
fn kb_extract_string_by_candidate_keys(
value: std::option::Option<&serde_json::Value>,
candidate_keys: &[&str],
) -> std::option::Option<std::string::String> {
let value = match value {
Some(value) => value,
None => return None,
};
kb_extract_string_by_candidate_keys_inner(value, candidate_keys)
}
fn kb_extract_string_by_candidate_keys_inner(
value: &serde_json::Value,
candidate_keys: &[&str],
) -> std::option::Option<std::string::String> {
if let Some(object) = value.as_object() {
for candidate_key in candidate_keys {
let direct_option = object.get(*candidate_key);
if let Some(direct) = direct_option {
let direct_text_option = direct.as_str();
if let Some(direct_text) = direct_text_option {
return Some(direct_text.to_string());
}
}
}
for nested_value in object.values() {
let nested_result =
kb_extract_string_by_candidate_keys_inner(nested_value, candidate_keys);
if nested_result.is_some() {
return nested_result;
}
}
return None;
}
if let Some(array) = value.as_array() {
for nested_value in array {
let nested_result =
kb_extract_string_by_candidate_keys_inner(nested_value, candidate_keys);
if nested_result.is_some() {
return nested_result;
}
}
}
None
}
fn kb_value_contains_any_key(
value: std::option::Option<&serde_json::Value>,
candidate_keys: &[&str],
) -> bool {
let value = match value {
Some(value) => value,
None => return false,
};
kb_value_contains_any_key_inner(value, candidate_keys)
}
fn kb_value_contains_any_key_inner(value: &serde_json::Value, candidate_keys: &[&str]) -> bool {
if let Some(object) = value.as_object() {
for candidate_key in candidate_keys {
if object.contains_key(*candidate_key) {
return true;
}
}
for nested_value in object.values() {
if kb_value_contains_any_key_inner(nested_value, candidate_keys) {
return true;
}
}
return false;
}
if let Some(array) = value.as_array() {
for nested_value in array {
if kb_value_contains_any_key_inner(nested_value, candidate_keys) {
return true;
}
}
}
false
}
fn kb_extract_account(
accounts: &[std::string::String],
index: usize,
) -> std::option::Option<std::string::String> {
if index >= accounts.len() {
return None;
}
Some(accounts[index].clone())
}
fn kb_infer_trade_side(log_messages: &[std::string::String]) -> crate::KbSwapTradeSide {
if kb_log_messages_contain_keyword(log_messages, "buy") {
return crate::KbSwapTradeSide::BuyBase;
}
if kb_log_messages_contain_keyword(log_messages, "sell") {
return crate::KbSwapTradeSide::SellBase;
}
crate::KbSwapTradeSide::Unknown
}
#[cfg(test)]
mod tests {
fn make_create_transaction() -> crate::KbChainTransactionDto {
let mut dto = crate::KbChainTransactionDto::new(
"sig-meteora-dbc-create-1".to_string(),
Some(888001),
Some(1779300001),
Some("helius_primary_http".to_string()),
Some("0".to_string()),
None,
None,
serde_json::json!({
"slot": 888001,
"meta": {
"logMessages": [
"Program log: Instruction: CreatePool"
]
},
"transaction": {
"message": {
"instructions": []
}
}
})
.to_string(),
);
dto.id = Some(301);
dto
}
fn make_create_instruction() -> crate::KbChainInstructionDto {
let mut dto = crate::KbChainInstructionDto::new(
301,
None,
0,
None,
Some(crate::KB_METEORA_DBC_PROGRAM_ID.to_string()),
Some("meteora-dbc".to_string()),
Some(1),
serde_json::json!([
"DbcPool111",
"DbcTokenA111",
"So11111111111111111111111111111111111111112",
"DbcConfig111",
"DbcCreator111"
])
.to_string(),
None,
None,
Some(
serde_json::json!({
"info": {
"pool": "DbcPool111",
"baseMint": "DbcTokenA111",
"quoteMint": "So11111111111111111111111111111111111111112",
"poolConfig": "DbcConfig111",
"creator": "DbcCreator111"
}
})
.to_string(),
),
);
dto.id = Some(302);
dto
}
fn make_swap_transaction() -> crate::KbChainTransactionDto {
let mut dto = crate::KbChainTransactionDto::new(
"sig-meteora-dbc-swap-1".to_string(),
Some(888002),
Some(1779300002),
Some("helius_primary_http".to_string()),
Some("0".to_string()),
None,
None,
serde_json::json!({
"slot": 888002,
"meta": {
"logMessages": [
"Program log: Instruction: Swap2"
]
},
"transaction": {
"message": {
"instructions": []
}
}
})
.to_string(),
);
dto.id = Some(303);
dto
}
fn make_swap_instruction() -> crate::KbChainInstructionDto {
let mut dto = crate::KbChainInstructionDto::new(
303,
None,
0,
None,
Some(crate::KB_METEORA_DBC_PROGRAM_ID.to_string()),
Some("meteora-dbc".to_string()),
Some(1),
serde_json::json!([
"DbcPoolSwap111",
"DbcSwapTokenA111",
"So11111111111111111111111111111111111111112"
])
.to_string(),
None,
None,
Some(
serde_json::json!({
"info": {
"pool": "DbcPoolSwap111",
"baseMint": "DbcSwapTokenA111",
"quoteMint": "So11111111111111111111111111111111111111112"
}
})
.to_string(),
),
);
dto.id = Some(304);
dto
}
#[test]
fn meteora_dbc_create_pool_is_detected() {
let decoder = crate::KbMeteoraDbcDecoder::new();
let transaction = make_create_transaction();
let instructions = vec![make_create_instruction()];
let decoded_result = decoder.decode_transaction(&transaction, &instructions);
let decoded = match decoded_result {
Ok(decoded) => decoded,
Err(error) => panic!("decode must succeed: {}", error),
};
assert_eq!(decoded.len(), 1);
match &decoded[0] {
crate::KbMeteoraDbcDecodedEvent::CreatePool(event) => {
assert_eq!(event.transaction_id, 301);
assert_eq!(event.instruction_id, 302);
assert_eq!(event.pool_account, Some("DbcPool111".to_string()));
assert_eq!(event.token_a_mint, Some("DbcTokenA111".to_string()));
assert_eq!(
event.token_b_mint,
Some("So11111111111111111111111111111111111111112".to_string())
);
assert_eq!(event.config_account, Some("DbcConfig111".to_string()));
}
crate::KbMeteoraDbcDecodedEvent::Swap(_) => {
panic!("unexpected swap event")
}
}
}
#[test]
fn meteora_dbc_swap_is_detected() {
let decoder = crate::KbMeteoraDbcDecoder::new();
let transaction = make_swap_transaction();
let instructions = vec![make_swap_instruction()];
let decoded_result = decoder.decode_transaction(&transaction, &instructions);
let decoded = match decoded_result {
Ok(decoded) => decoded,
Err(error) => panic!("decode must succeed: {}", error),
};
assert_eq!(decoded.len(), 1);
match &decoded[0] {
crate::KbMeteoraDbcDecodedEvent::Swap(event) => {
assert_eq!(event.transaction_id, 303);
assert_eq!(event.instruction_id, 304);
assert_eq!(event.pool_account, Some("DbcPoolSwap111".to_string()));
assert_eq!(event.token_a_mint, Some("DbcSwapTokenA111".to_string()));
assert_eq!(
event.token_b_mint,
Some("So11111111111111111111111111111111111111112".to_string())
);
}
crate::KbMeteoraDbcDecodedEvent::CreatePool(_) => {
panic!("unexpected create event")
}
}
}
}