ethers-rs/ethers-providers/tests/txpool.rs

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#![cfg(not(target_arch = "wasm32"))]
use ethers::{
providers::{Http, Middleware, Provider},
types::TransactionRequest,
utils::Geth,
};
use std::convert::TryFrom;
#[tokio::test]
async fn txpool() {
let geth = Geth::new().block_time(20u64).spawn();
let provider = Provider::<Http>::try_from(geth.endpoint()).unwrap();
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let account = provider.get_accounts().await.unwrap()[0];
let value: u64 = 42;
let gas_price = ethers::types::U256::from_dec_str("221435145689").unwrap();
let mut tx = TransactionRequest::new()
.to(account)
.from(account)
.value(value)
.gas_price(gas_price);
// send a few transactions
let mut txs = Vec::new();
for _ in 0..10 {
let tx_hash = provider.send_transaction(tx.clone(), None).await.unwrap();
txs.push(tx_hash);
}
// we gave a 20s block time, should be plenty for us to get the txpool's content
let status = provider.txpool_status().await.unwrap();
assert_eq!(status.pending.as_u64(), 10);
assert_eq!(status.queued.as_u64(), 0);
let inspect = provider.txpool_inspect().await.unwrap();
assert!(inspect.queued.is_empty());
let summary = inspect.pending.get(&account).unwrap();
for i in 0..10 {
let tx_summary = summary.get(&i.to_string()).unwrap();
assert_eq!(tx_summary.gas_price, gas_price);
assert_eq!(tx_summary.value, value.into());
assert_eq!(tx_summary.gas, 21000.into());
assert_eq!(tx_summary.to.unwrap(), account);
}
let content = provider.txpool_content().await.unwrap();
assert!(content.queued.is_empty());
let content = content.pending.get(&account).unwrap();
// the txs get their gas and nonce auto-set upon mempool entry
tx = tx.gas(21000);
for i in 0..10 {
tx = tx.nonce(i);
let req = content.get(&i.to_string()).unwrap();
assert_eq!(req, &tx);
}
}