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| 1 | +// |
| 2 | +// event_processor.rs |
| 3 | +// Copyright (C) 2023 db3.network Author imotai <[email protected]> |
| 4 | +// |
| 5 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | +// you may not use this file except in compliance with the License. |
| 7 | +// You may obtain a copy of the License at |
| 8 | +// |
| 9 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | +// |
| 11 | +// Unless required by applicable law or agreed to in writing, software |
| 12 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | +// See the License for the specific language governing permissions and |
| 15 | +// limitations under the License. |
| 16 | +// |
| 17 | + |
| 18 | +use db3_crypto::db3_address::DB3Address; |
| 19 | +use db3_error::{DB3Error, Result}; |
| 20 | +use db3_storage::db_store_v2::DBStoreV2; |
| 21 | +use ethabi::{Log as EthLog, Token}; |
| 22 | +use ethers::abi::RawLog; |
| 23 | +use ethers::types::Address; |
| 24 | +use ethers::types::Filter; |
| 25 | +use ethers::{ |
| 26 | + core::abi::Abi, |
| 27 | + providers::{Middleware, Provider, StreamExt, Ws}, |
| 28 | +}; |
| 29 | +use std::collections::HashSet; |
| 30 | +use std::sync::atomic::{AtomicBool, AtomicU64, Ordering}; |
| 31 | +use std::sync::Arc; |
| 32 | +use tracing::{info, warn}; |
| 33 | + |
| 34 | +#[derive(Debug)] |
| 35 | +pub struct EventProcessorConfig { |
| 36 | + pub evm_node_url: String, |
| 37 | + pub db_addr: String, |
| 38 | + pub abi: String, |
| 39 | + pub target_events: HashSet<String>, |
| 40 | + pub contract_addr: String, |
| 41 | +} |
| 42 | + |
| 43 | +pub struct EventProcessor { |
| 44 | + config: EventProcessorConfig, |
| 45 | + provider: Arc<Provider<Ws>>, |
| 46 | + running: Arc<AtomicBool>, |
| 47 | + db_store: DBStoreV2, |
| 48 | + block_number: Arc<AtomicU64>, |
| 49 | + event_number: Arc<AtomicU64>, |
| 50 | +} |
| 51 | + |
| 52 | +unsafe impl Sync for EventProcessor {} |
| 53 | +unsafe impl Send for EventProcessor {} |
| 54 | +impl EventProcessor { |
| 55 | + pub async fn new(config: EventProcessorConfig, db_store: DBStoreV2) -> Result<Self> { |
| 56 | + info!("new event processor with config {:?}", config); |
| 57 | + let provider = Provider::<Ws>::connect(&config.evm_node_url) |
| 58 | + .await |
| 59 | + .map_err(|e| DB3Error::StoreEventError(format!("{e}")))?; |
| 60 | + let provider_arc = Arc::new(provider); |
| 61 | + Ok(Self { |
| 62 | + config, |
| 63 | + provider: provider_arc, |
| 64 | + running: Arc::new(AtomicBool::new(false)), |
| 65 | + db_store, |
| 66 | + block_number: Arc::new(AtomicU64::new(0)), |
| 67 | + event_number: Arc::new(AtomicU64::new(0)), |
| 68 | + }) |
| 69 | + } |
| 70 | + |
| 71 | + pub fn close(&self) { |
| 72 | + self.running.store(false, Ordering::Relaxed); |
| 73 | + info!( |
| 74 | + "stop the event processor for db {}", |
| 75 | + self.config.db_addr.as_str() |
| 76 | + ); |
| 77 | + } |
| 78 | + |
| 79 | + pub fn get_config<'a>(&'a self) -> &'a EventProcessorConfig { |
| 80 | + &self.config |
| 81 | + } |
| 82 | + |
| 83 | + pub fn get_block_number(&self) -> u64 { |
| 84 | + self.block_number.load(Ordering::Relaxed) |
| 85 | + } |
| 86 | + |
| 87 | + pub fn get_event_number(&self) -> u64 { |
| 88 | + self.event_number.load(Ordering::Relaxed) |
| 89 | + } |
| 90 | + |
| 91 | + pub async fn start(&self) -> Result<()> { |
| 92 | + let abi: Abi = serde_json::from_str(self.config.abi.as_str()) |
| 93 | + .map_err(|e| DB3Error::StoreEventError(format!("{e}")))?; |
| 94 | + info!( |
| 95 | + "event processor for contract {}", |
| 96 | + self.config.contract_addr.as_str() |
| 97 | + ); |
| 98 | + self.running |
| 99 | + .store(true, std::sync::atomic::Ordering::Relaxed); |
| 100 | + let address = self |
| 101 | + .config |
| 102 | + .contract_addr |
| 103 | + .parse::<Address>() |
| 104 | + .map_err(|e| DB3Error::StoreEventError(format!("{e}")))?; |
| 105 | + let db_addr = DB3Address::from_hex(self.config.db_addr.as_str()) |
| 106 | + .map_err(|e| DB3Error::StoreEventError(format!("{e}")))?; |
| 107 | + |
| 108 | + let filter = Filter::new().address(address); |
| 109 | + let mut stream = self |
| 110 | + .provider |
| 111 | + .subscribe_logs(&filter) |
| 112 | + .await |
| 113 | + .map_err(|e| DB3Error::StoreEventError(format!("{e}")))?; |
| 114 | + while let Some(log) = stream.next().await { |
| 115 | + if !self.running.load(Ordering::Relaxed) { |
| 116 | + info!( |
| 117 | + "stop event processor for contract {}", |
| 118 | + self.config.contract_addr.as_str() |
| 119 | + ); |
| 120 | + break; |
| 121 | + } |
| 122 | + if let Some(number) = log.block_number { |
| 123 | + self.block_number.store(number.as_u64(), Ordering::Relaxed) |
| 124 | + } |
| 125 | + for e in abi.events() { |
| 126 | + // verify |
| 127 | + let event_signature = log |
| 128 | + .topics |
| 129 | + .get(0) |
| 130 | + .ok_or(DB3Error::StoreEventError(format!("")))?; |
| 131 | + |
| 132 | + if event_signature != &e.signature() { |
| 133 | + continue; |
| 134 | + } |
| 135 | + if !self.config.target_events.contains(e.name.as_str()) { |
| 136 | + continue; |
| 137 | + } |
| 138 | + let raw_log = RawLog { |
| 139 | + topics: log.topics.clone(), |
| 140 | + data: log.data.to_vec(), |
| 141 | + }; |
| 142 | + if let Ok(log_entry) = e.parse_log(raw_log) { |
| 143 | + let json_value = Self::log_to_doc(&log_entry); |
| 144 | + match serde_json::to_string(&json_value) { |
| 145 | + Ok(value) => { |
| 146 | + let values = vec![value.to_string()]; |
| 147 | + if let Err(e) = self.db_store.add_docs( |
| 148 | + &db_addr, |
| 149 | + &DB3Address::ZERO, |
| 150 | + e.name.as_str(), |
| 151 | + &values, |
| 152 | + ) { |
| 153 | + warn!("fail to write json doc {} for {e}", value.as_str()); |
| 154 | + } else { |
| 155 | + self.event_number.fetch_add(1, Ordering::Relaxed); |
| 156 | + } |
| 157 | + } |
| 158 | + Err(e) => { |
| 159 | + warn!("fail to convert to json for {e}"); |
| 160 | + } |
| 161 | + } |
| 162 | + break; |
| 163 | + } |
| 164 | + } |
| 165 | + } |
| 166 | + Ok(()) |
| 167 | + } |
| 168 | + |
| 169 | + fn log_to_doc(log: &EthLog) -> serde_json::Value { |
| 170 | + let mut doc = serde_json::Map::new(); |
| 171 | + for log_param in &log.params { |
| 172 | + doc.insert( |
| 173 | + log_param.name.to_string(), |
| 174 | + Self::param_to_value(&log_param.value), |
| 175 | + ); |
| 176 | + } |
| 177 | + serde_json::Value::Object(doc) |
| 178 | + } |
| 179 | + |
| 180 | + fn param_to_value(param: &Token) -> serde_json::Value { |
| 181 | + match param { |
| 182 | + Token::Address(addr) => { |
| 183 | + serde_json::value::Value::String(format!("0x{}", hex::encode(addr.as_bytes()))) |
| 184 | + } |
| 185 | + Token::String(value) => serde_json::value::Value::String(value.to_string()), |
| 186 | + Token::Uint(value) | Token::Int(value) => { |
| 187 | + serde_json::value::Value::String(value.to_string()) |
| 188 | + } |
| 189 | + _ => todo!(), |
| 190 | + } |
| 191 | + } |
| 192 | +} |
| 193 | + |
| 194 | +#[cfg(test)] |
| 195 | +mod tests { |
| 196 | + use super::*; |
| 197 | + #[tokio::test] |
| 198 | + async fn test_event_processor() { |
| 199 | + // let contract_abi: &str = r#"[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint256"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"deposit","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":true,"name":"guy","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":true,"name":"dst","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"dst","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"src","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Withdrawal","type":"event"}]"#; |
| 200 | + // let config = EventProcessorConfig { |
| 201 | + // evm_node_url: "wss://polygon-mainnet.g.alchemy.com/v2/EH9ZSJ0gS7a1DEIohAWMbhP33lK6qHj9" |
| 202 | + // .to_string(), |
| 203 | + // db_addr: "0xaaaaa".to_string(), |
| 204 | + // abi: contract_abi.to_string(), |
| 205 | + // target_events: Has, |
| 206 | + // contract_addr: "0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270".to_string(), |
| 207 | + // }; |
| 208 | + } |
| 209 | +} |
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