23 lines
590 B
Rust
23 lines
590 B
Rust
use web3::types::{H256, Address, FilterBuilder};
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use ethabi;
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fn web3_topic(topic: ethabi::Topic<ethabi::Hash>) -> Option<Vec<H256>> {
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let t: Vec<ethabi::Hash> = topic.into();
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// parity does not conform to an ethereum spec
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if t.is_empty() {
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None
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} else {
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Some(t)
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}
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}
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pub fn web3_filter(filter: ethabi::TopicFilter, address: Address) -> FilterBuilder {
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let t0 = web3_topic(filter.topic0);
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let t1 = web3_topic(filter.topic1);
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let t2 = web3_topic(filter.topic2);
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let t3 = web3_topic(filter.topic3);
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FilterBuilder::default()
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.address(vec![address])
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.topics(t0, t1, t2, t3)
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}
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