362 lines
13 KiB
Rust
362 lines
13 KiB
Rust
use std::collections::HashMap;
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use anyhow::Result;
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use itertools::Itertools;
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use substreams::{
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pb::substreams::StoreDeltas,
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scalar::BigInt,
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store::{
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StoreAddBigInt, StoreGet, StoreGetInt64, StoreGetString, StoreNew, StoreSet, StoreSetInt64,
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StoreSetString,
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},
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};
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use substreams_ethereum::pb::eth;
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use crate::{
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consts::{CONTRACTS_TO_INDEX, NEW_SUSD, OLD_SUSD},
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pool_changes::emit_eth_deltas,
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pool_factories,
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pools::emit_specific_pools,
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};
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use tycho_substreams::{
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balances::{extract_balance_deltas_from_tx, store_balance_changes},
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contract::extract_contract_changes,
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prelude::*,
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};
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/// This struct purely exists to spoof the `PartialEq` trait for `Transaction` so we can use it in
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/// a later groupby operation.
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#[derive(Debug)]
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struct TransactionWrapper(Transaction);
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impl PartialEq for TransactionWrapper {
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fn eq(&self, other: &Self) -> bool {
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self.0.hash == other.0.hash
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}
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}
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#[substreams::handlers::map]
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// Map all created components and their related entity changes.
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pub fn map_components(params: String, block: eth::v2::Block) -> Result<BlockChanges> {
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let changes = block
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.transactions()
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.filter_map(|tx| {
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let mut entity_changes = vec![];
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let mut components = vec![];
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for (log, call) in tx
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.logs_with_calls()
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.filter(|(_, call)| !call.call.state_reverted)
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{
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if let Some((component, mut state)) = pool_factories::address_map(
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call.call
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.address
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.as_slice()
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.try_into()
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.ok()?, // this shouldn't fail
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log,
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call.call,
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tx,
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) {
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entity_changes.append(&mut state);
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components.push(component);
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}
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}
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if let Some((component, mut state)) = emit_specific_pools(¶ms, tx).expect(
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"An unexpected error occured when parsing params for emitting specific pools",
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) {
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entity_changes.append(&mut state);
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components.push(component);
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}
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if components.is_empty() {
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None
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} else {
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Some(TransactionChanges {
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tx: Some(Transaction {
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hash: tx.hash.clone(),
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from: tx.from.clone(),
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to: tx.to.clone(),
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index: tx.index.into(),
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}),
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contract_changes: vec![],
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entity_changes,
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component_changes: components,
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balance_changes: vec![],
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})
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}
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})
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.collect::<Vec<_>>();
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Ok(BlockChanges { block: None, changes })
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}
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/// Get result `map_components` and stores the created `ProtocolComponent`s with the pool id as the
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/// key and tokens as the value
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#[substreams::handlers::store]
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pub fn store_component_tokens(map: BlockChanges, store: StoreSetString) {
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map.changes
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.iter()
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.flat_map(|tx_changes| &tx_changes.component_changes)
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.for_each(|component| {
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store.set(
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0,
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format!("pool:{0}", component.id),
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&component
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.tokens
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.iter()
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.map(hex::encode)
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.join(":"),
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);
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});
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}
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/// Stores contracts required by components, for example LP tokens if they are different from the
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/// pool.
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/// This is later used to index them with `extract_contract_changes`
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#[substreams::handlers::store]
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pub fn store_non_component_accounts(map: BlockChanges, store: StoreSetInt64) {
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map.changes
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.iter()
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.flat_map(|tx_changes| &tx_changes.component_changes)
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.for_each(|component| {
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// Crypto pool factory creates LP token separated from the pool, we need to index it so
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// we add it to the store if the new protocol component comes from this factory
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if component.has_attributes(&[
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("pool_type", "crypto_pool".into()),
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("factory_name", "crypto_pool_factory".into()),
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]) {
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let lp_token = component
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.get_attribute_value("lp_token")
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.expect("didn't find lp_token attribute");
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store.set(0, hex::encode(lp_token), &1);
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}
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});
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}
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/// Since the `PoolBalanceChanged` events administer only deltas, we need to leverage a map and a
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/// store to be able to tally up final balances for tokens in a pool.
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#[substreams::handlers::map]
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pub fn map_relative_balances(
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block: eth::v2::Block,
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tokens_store: StoreGetString,
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) -> Result<BlockBalanceDeltas, anyhow::Error> {
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Ok(BlockBalanceDeltas {
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balance_deltas: {
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let mut deltas: Vec<_> = block
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.transactions()
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.flat_map(|tx| {
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emit_eth_deltas(tx, &tokens_store)
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.into_iter()
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.chain(
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extract_balance_deltas_from_tx(tx, |token, transactor| {
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let pool_key = format!("pool:{}", hex::encode(transactor));
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if let Some(tokens) = tokens_store.get_last(pool_key) {
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let token_id = if token == OLD_SUSD {
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hex::encode(NEW_SUSD)
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} else {
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hex::encode(token)
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};
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tokens.split(':').any(|t| t == token_id)
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} else {
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false
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}
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})
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.into_iter()
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.map(|mut balance| {
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if balance.token == OLD_SUSD {
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balance.token = NEW_SUSD.into();
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}
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balance
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})
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.collect::<Vec<_>>(),
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)
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})
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.collect();
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// Keep it consistent with how it's inserted in the store. This step is important
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// because we use a zip on the store deltas and balance deltas later.
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deltas.sort_unstable_by(|a, b| a.ord.cmp(&b.ord));
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deltas
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},
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})
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}
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/// It's significant to include both the `pool_id` and the `token_id` for each balance delta as the
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/// store key to ensure that there's a unique balance being tallied for each.
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#[substreams::handlers::store]
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pub fn store_balances(deltas: BlockBalanceDeltas, store: StoreAddBigInt) {
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store_balance_changes(deltas, store)
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}
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/// This is the main map that handles most of the indexing of this substream.
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/// Every change is grouped by transaction index via the `transaction_changes`
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/// map. Each block of code will extend the `TransactionChanges` struct with the
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/// cooresponding changes (balance, component, contract), inserting a new one if it doesn't exist.
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/// At the very end, the map can easily be sorted by index to ensure the final
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/// `BlockContractChanges` is ordered by transactions properly.
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#[substreams::handlers::map]
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pub fn map_protocol_changes(
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block: eth::v2::Block,
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grouped_components: BlockChanges,
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deltas: BlockBalanceDeltas,
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components_store: StoreGetString,
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non_component_accounts_store: StoreGetInt64,
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balance_store: StoreDeltas, // Note, this map module is using the `deltas` mode for the store.
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) -> Result<BlockChanges> {
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// We merge contract changes by transaction (identified by transaction index) making it easy to
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// sort them at the very end.
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let mut transaction_changes: HashMap<_, TransactionChanges> = HashMap::new();
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// `ProtocolComponents` are gathered with some entity changes from `map_pools_created` which
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// just need a bit of work to convert into `TransactionChanges`
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grouped_components
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.changes
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.into_iter()
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.for_each(|tx_changes| {
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let tx = tx_changes.tx.as_ref().unwrap();
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let transaction_entry = transaction_changes
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.entry(tx.index)
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.or_insert_with(|| TransactionChanges {
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tx: Some(tx.clone()),
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contract_changes: vec![],
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component_changes: vec![],
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balance_changes: vec![],
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entity_changes: vec![],
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});
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let formated_components: Vec<_> = tx_changes //TODO: format directly at creation
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.component_changes
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.into_iter()
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.map(|mut component| {
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component.id = format!("0x{}", component.id);
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component
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})
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.collect();
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transaction_entry
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.component_changes
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.extend(formated_components);
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transaction_entry
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.entity_changes
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.extend(tx_changes.entity_changes);
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});
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// Balance changes are gathered by the `StoreDelta` based on `TokenExchange`, etc. creating
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// `BalanceDeltas`. We essentially just process the changes that occured to the `store` this
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// block. Then, these balance changes are merged onto the existing map of tx contract changes,
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// inserting a new one if it doesn't exist.
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balance_store
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.deltas
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.into_iter()
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.zip(deltas.balance_deltas)
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.map(|(store_delta, balance_delta)| {
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let new_value_string = String::from_utf8(store_delta.new_value)
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.unwrap()
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.to_string();
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(
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balance_delta.tx.unwrap(),
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BalanceChange {
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token: balance_delta.token,
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balance: BigInt::try_from(new_value_string)
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.unwrap()
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.to_signed_bytes_be(),
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component_id: format!(
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"0x{}",
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String::from_utf8(balance_delta.component_id).unwrap()
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)
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.into(),
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},
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)
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})
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// We need to group the balance changes by tx hash for the `TransactionChanges` agg
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.chunk_by(|(tx, _)| TransactionWrapper(tx.clone()))
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.into_iter()
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.for_each(|(tx_wrapped, group)| {
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let tx = tx_wrapped.0;
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transaction_changes
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.entry(tx.index)
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.or_insert_with(|| TransactionChanges {
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tx: Some(tx.clone()),
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contract_changes: vec![],
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component_changes: vec![],
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balance_changes: vec![],
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entity_changes: vec![],
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})
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.balance_changes
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.extend(group.map(|(_, change)| change));
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});
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// General helper for extracting contract changes. Uses block, our component store which holds
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// all of our tracked deployed pool addresses, and the map of tx contract changes which we
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// output into for final processing later.
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extract_contract_changes(
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&block,
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|addr| {
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components_store
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.get_last(format!("pool:{0}", hex::encode(addr)))
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.is_some() ||
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non_component_accounts_store
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.get_last(hex::encode(addr))
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.is_some() ||
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CONTRACTS_TO_INDEX.contains(
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addr.try_into()
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.expect("address should be 20 bytes long"),
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)
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},
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&mut transaction_changes,
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);
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for change in transaction_changes.values_mut() {
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for balance_change in change.balance_changes.iter_mut() {
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replace_eth_address(&mut balance_change.token);
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}
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for component_change in change.component_changes.iter_mut() {
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for token in component_change.tokens.iter_mut() {
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replace_eth_address(token);
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}
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}
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}
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// Process all `transaction_changes` for final output in the `BlockContractChanges`,
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// sorted by transaction index (the key).
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Ok(BlockChanges {
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block: Some(Block {
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number: block.number,
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hash: block.hash.clone(),
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parent_hash: block
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.header
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.as_ref()
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.expect("Block header not present")
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.parent_hash
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.clone(),
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ts: block.timestamp_seconds(),
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}),
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changes: transaction_changes
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.drain()
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.sorted_unstable_by_key(|(index, _)| *index)
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.filter_map(|(_, change)| {
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if change.contract_changes.is_empty() &&
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change.component_changes.is_empty() &&
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change.balance_changes.is_empty()
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{
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None
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} else {
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Some(change)
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}
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})
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.collect::<Vec<_>>(),
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})
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}
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fn replace_eth_address(token: &mut Vec<u8>) {
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let eth_address = [238u8; 20]; // 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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if *token == eth_address {
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*token = [0u8; 20].to_vec();
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}
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}
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