feat: lots of refactoring (file splitting
- `lib.rs` split into multiple files with `modules.rs` being the main entrypoint for substreams - contract changes are tracked similiarly to ambient (generalized to use a store of tracked contracts) - static attributes were pruned of the dynamic ones
This commit is contained in:
0xMochan
239
substreams/ethereum-balancer/src/modules.rs
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239
substreams/ethereum-balancer/src/modules.rs
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use std::collections::HashMap;
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use anyhow::Result;
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use substreams::hex;
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use substreams::pb::substreams::StoreDeltas;
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use substreams::store::{
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StoreAdd, StoreAddBigInt, StoreAddInt64, StoreGet, StoreGetInt64, StoreNew,
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};
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use substreams::key;
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use substreams::scalar::BigInt;
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use substreams_ethereum::pb::eth;
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use itertools::Itertools;
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use pb::tycho::evm::v1::{self as tycho};
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use contract_changes::extract_contract_changes;
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use crate::{abi, contract_changes, pb, pool_factories};
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const VAULT_ADDRESS: &[u8] = &hex!("BA12222222228d8Ba445958a75a0704d566BF2C8");
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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(tycho::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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pub fn map_pools_created(
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block: eth::v2::Block,
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) -> Result<tycho::GroupedTransactionProtocolComponents> {
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// Gather contract changes by indexing `PoolCreated` events and analysing the `Create` call
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// We store these as a hashmap by tx hash since we need to agg by tx hash later
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Ok(tycho::GroupedTransactionProtocolComponents {
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tx_components: block
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.transactions()
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.map(|tx| tycho::TransactionProtocolComponents {
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tx: Some(tycho::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: Into::<u64>::into(tx.index),
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}),
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components: tx
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.logs_with_calls()
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.filter(|(_, call)| !call.call.state_reverted)
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.filter_map(|(log, call)| {
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Some(pool_factories::address_map(
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call.call.address.as_slice(),
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log,
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call.call,
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)?)
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})
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.collect::<Vec<_>>(),
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})
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.collect::<Vec<_>>(),
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})
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}
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/// Simply stores the `ProtocolComponent`s with the pool id as the key
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#[substreams::handlers::store]
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pub fn store_pools_created(map: tycho::GroupedTransactionProtocolComponents, store: StoreAddInt64) {
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store.add_many(
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0,
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&map.tx_components
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.iter()
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.flat_map(|tx_components| &tx_components.components)
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.map(|component| format!("pool:{0}", component.id))
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.collect::<Vec<_>>(),
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1,
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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_balance_deltas(block: eth::v2::Block) -> Result<tycho::BalanceDeltas, anyhow::Error> {
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Ok(tycho::BalanceDeltas {
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balance_deltas: block
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.events::<abi::vault::events::PoolBalanceChanged>(&[&VAULT_ADDRESS])
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.flat_map(|(event, log)| {
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event
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.tokens
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.iter()
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.zip(event.deltas.iter())
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.map(|(token, delta)| tycho::BalanceDelta {
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ord: log.log.ordinal,
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tx: Some(tycho::Transaction {
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hash: log.receipt.transaction.hash.clone(),
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from: log.receipt.transaction.from.clone(),
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to: log.receipt.transaction.to.clone(),
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index: Into::<u64>::into(log.receipt.transaction.index),
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}),
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token: token.clone(),
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delta: delta.to_signed_bytes_be(),
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component_id: event.pool_id.into(),
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})
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.collect::<Vec<_>>()
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})
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.collect::<Vec<_>>(),
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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_balance_changes(deltas: tycho::BalanceDeltas, store: StoreAddBigInt) {
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deltas.balance_deltas.iter().for_each(|delta| {
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store.add(
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delta.ord,
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format!(
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"pool:{0}:token:{1}",
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hex::encode(&delta.component_id),
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hex::encode(&delta.token)
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),
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BigInt::from_signed_bytes_be(&delta.delta),
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);
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});
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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 contract change is grouped by transaction index via the `transaction_contract_changes`
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/// map. Each block of code will extend the `TransactionContractChanges` 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 `BlockContractChanges`
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/// is ordered by transactions properly.
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#[substreams::handlers::map]
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pub fn map_changes(
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block: eth::v2::Block,
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grouped_components: tycho::GroupedTransactionProtocolComponents,
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deltas: tycho::BalanceDeltas,
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components_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<tycho::BlockContractChanges> {
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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_contract_changes: HashMap<_, tycho::TransactionContractChanges> =
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HashMap::new();
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// `ProtocolComponents` are gathered from `map_pools_created` which just need a bit of work to
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// convert into `TransactionContractChanges`
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grouped_components
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.tx_components
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.iter()
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.for_each(|tx_component| {
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let tx = tx_component.tx.as_ref().unwrap();
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transaction_contract_changes
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.entry(tx.index)
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.or_insert_with(|| tycho::TransactionContractChanges {
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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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})
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.component_changes
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.extend_from_slice(&tx_component.components);
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});
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// Balance changes are gathered by the `StoreDelta` based on `PoolBalanceChanged` 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 pool_id = key::segment_at(&store_delta.key, 1);
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let token_id = key::segment_at(&store_delta.key, 3);
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(
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balance_delta.tx.unwrap(),
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tycho::BalanceChange {
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token: hex::decode(token_id).expect("Token ID not valid hex"),
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balance: store_delta.new_value,
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component_id: hex::decode(pool_id).expect("Token ID not valid hex"),
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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 `TransactionContractChanges` agg
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.group_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_contract_changes
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.entry(tx.index)
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.or_insert_with(|| tycho::TransactionContractChanges {
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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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})
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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(&block, components_store, &mut transaction_contract_changes);
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// Process all `transaction_contract_changes` for final output in the `BlockContractChanges`,
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// sorted by transaction index (the key).
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Ok(tycho::BlockContractChanges {
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block: Some(tycho::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_contract_changes
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.drain()
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.sorted_unstable_by_key(|(index, _)| index.clone())
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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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