307 lines
11 KiB
Rust
307 lines
11 KiB
Rust
//! This is a basic representation of a contract ABI that does no post processing but contains the
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//! raw content of the ABI.
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#![allow(missing_docs)]
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use ethers_core::types::Bytes;
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use serde::{
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de::{MapAccess, SeqAccess, Visitor},
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Deserialize, Deserializer, Serialize,
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};
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/// Contract ABI as a list of items where each item can be a function, constructor or event
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#[derive(Debug, Clone, Serialize)]
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#[serde(transparent)]
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pub struct RawAbi(Vec<Item>);
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impl IntoIterator for RawAbi {
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type Item = Item;
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type IntoIter = std::vec::IntoIter<Self::Item>;
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#[inline]
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fn into_iter(self) -> Self::IntoIter {
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self.0.into_iter()
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}
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}
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struct RawAbiVisitor;
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impl<'de> Visitor<'de> for RawAbiVisitor {
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type Value = RawAbi;
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fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
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formatter.write_str("a sequence or map with `abi` key")
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}
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fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
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where
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A: SeqAccess<'de>,
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{
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let mut vec = Vec::new();
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while let Some(element) = seq.next_element()? {
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vec.push(element);
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}
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Ok(RawAbi(vec))
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}
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fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
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where
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A: MapAccess<'de>,
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{
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let mut vec = None;
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while let Some(key) = map.next_key::<String>()? {
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if key == "abi" {
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vec = Some(RawAbi(map.next_value::<Vec<Item>>()?));
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} else {
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map.next_value::<serde::de::IgnoredAny>()?;
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}
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}
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vec.ok_or_else(|| serde::de::Error::missing_field("abi"))
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}
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}
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impl<'de> Deserialize<'de> for RawAbi {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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deserializer.deserialize_any(RawAbiVisitor)
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}
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}
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#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
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#[serde(rename_all = "camelCase")]
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pub struct Item {
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#[serde(default)]
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pub inputs: Vec<Component>,
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#[serde(default, skip_serializing_if = "Option::is_none")]
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pub state_mutability: Option<String>,
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#[serde(rename = "type")]
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pub type_field: String,
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#[serde(default, skip_serializing_if = "Option::is_none")]
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pub name: Option<String>,
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#[serde(default)]
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pub outputs: Vec<Component>,
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// required to satisfy solidity events
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#[serde(default, skip_serializing_if = "Option::is_none")]
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pub anonymous: Option<bool>,
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}
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/// Either an input/output or a nested component of an input/output
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#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
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pub struct Component {
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#[serde(rename = "internalType", default, skip_serializing_if = "Option::is_none")]
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pub internal_type: Option<String>,
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#[serde(default)]
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pub name: String,
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#[serde(rename = "type")]
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pub type_field: String,
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#[serde(default)]
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pub components: Vec<Component>,
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/// Indexed flag. for solidity events
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#[serde(default, skip_serializing_if = "Option::is_none")]
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pub indexed: Option<bool>,
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}
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/// Represents contract ABI input variants
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#[derive(Deserialize)]
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#[serde(untagged)]
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pub(crate) enum JsonAbi {
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/// json object input as `{"abi": [..], "bin": "..."}`
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Object(AbiObject),
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/// json array input as `[]`
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#[serde(deserialize_with = "deserialize_abi_array")]
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Array(RawAbi),
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}
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fn deserialize_abi_array<'de, D>(deserializer: D) -> Result<RawAbi, D::Error>
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where
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D: Deserializer<'de>,
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{
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deserializer.deserialize_seq(RawAbiVisitor)
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}
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/// Contract ABI and optional bytecode as JSON object
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pub(crate) struct AbiObject {
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pub abi: RawAbi,
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pub bytecode: Option<Bytes>,
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}
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struct AbiObjectVisitor;
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impl<'de> Visitor<'de> for AbiObjectVisitor {
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type Value = AbiObject;
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fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
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formatter.write_str("a sequence or map with `abi` key")
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}
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fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
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where
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A: MapAccess<'de>,
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{
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let mut abi = None;
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let mut bytecode = None;
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#[derive(Deserialize)]
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struct BytecodeObject {
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object: Bytes,
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}
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struct DeserializeBytes(Bytes);
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impl<'de> Deserialize<'de> for DeserializeBytes {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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Ok(DeserializeBytes(ethers_core::types::deserialize_bytes(deserializer)?.into()))
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}
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}
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while let Some(key) = map.next_key::<String>()? {
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match key.as_str() {
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"abi" => {
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abi = Some(RawAbi(map.next_value::<Vec<Item>>()?));
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}
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"bytecode" | "byteCode" => {
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bytecode = map
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.next_value::<BytecodeObject>()
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.ok()
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.map(|obj| obj.object)
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.filter(|bytecode| !bytecode.0.is_empty());
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}
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"bin" => {
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bytecode = map
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.next_value::<DeserializeBytes>()
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.ok()
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.map(|b| b.0)
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.filter(|b| !b.0.is_empty());
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}
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_ => {
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map.next_value::<serde::de::IgnoredAny>()?;
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}
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}
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}
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let abi = abi.ok_or_else(|| serde::de::Error::missing_field("abi"))?;
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Ok(AbiObject { abi, bytecode })
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}
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}
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impl<'de> Deserialize<'de> for AbiObject {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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deserializer.deserialize_map(AbiObjectVisitor)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use ethers_core::abi::Abi;
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fn assert_has_bytecode(s: &str) {
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match serde_json::from_str::<JsonAbi>(s).unwrap() {
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JsonAbi::Object(abi) => {
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assert!(abi.bytecode.is_some());
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}
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_ => {
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panic!("expected abi object")
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}
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}
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}
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#[test]
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fn can_parse_raw_abi() {
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const VERIFIER_ABI: &str = include_str!("../../tests/solidity-contracts/verifier_abi.json");
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let _ = serde_json::from_str::<RawAbi>(VERIFIER_ABI).unwrap();
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}
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#[test]
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fn can_parse_hardhat_raw_abi() {
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const VERIFIER_ABI: &str =
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include_str!("../../tests/solidity-contracts/verifier_abi_hardhat.json");
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let _ = serde_json::from_str::<RawAbi>(VERIFIER_ABI).unwrap();
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}
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/// due to ethabi's limitations some may be stripped when ethers-solc generates the abi, such as
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/// the name of the component
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#[test]
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fn can_parse_ethers_solc_generated_abi() {
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let s = r#"[{"type":"function","name":"greet","inputs":[{"internalType":"struct Greeter.Stuff","name":"stuff","type":"tuple","components":[{"type":"bool"}]}],"outputs":[{"internalType":"struct Greeter.Stuff","name":"","type":"tuple","components":[{"type":"bool"}]}],"stateMutability":"view"}]"#;
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let _ = serde_json::from_str::<RawAbi>(s).unwrap();
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}
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#[test]
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fn can_ethabi_round_trip() {
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let s = r#"[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"number","type":"uint64"}],"name":"MyEvent","type":"event"},{"inputs":[],"name":"greet","outputs":[],"stateMutability":"nonpayable","type":"function"}]"#;
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let raw = serde_json::from_str::<RawAbi>(s).unwrap();
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let abi = serde_json::from_str::<Abi>(s).unwrap();
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let de = serde_json::to_string(&raw).unwrap();
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assert_eq!(abi, serde_json::from_str::<Abi>(&de).unwrap());
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}
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#[test]
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fn can_deserialize_abi_object() {
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let abi_str = r#"[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"number","type":"uint64"}],"name":"MyEvent","type":"event"},{"inputs":[],"name":"greet","outputs":[],"stateMutability":"nonpayable","type":"function"}]"#;
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let abi = serde_json::from_str::<JsonAbi>(abi_str).unwrap();
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assert!(matches!(abi, JsonAbi::Array(_)));
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let code = "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";
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let s = format!(r#"{{"abi": {}, "bin" : "{}" }}"#, abi_str, code);
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assert_has_bytecode(&s);
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let s = format!(r#"{{"abi": {}, "bytecode" : {{ "object": "{}" }} }}"#, abi_str, code);
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assert_has_bytecode(&s);
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let hh_artifact = include_str!("../../tests/solidity-contracts/verifier_abi_hardhat.json");
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match serde_json::from_str::<JsonAbi>(hh_artifact).unwrap() {
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JsonAbi::Object(abi) => {
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assert!(abi.bytecode.is_none());
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}
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_ => {
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panic!("expected abi object")
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}
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}
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}
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#[test]
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fn can_parse_greeter_bytecode() {
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let artifact = include_str!("../../tests/solidity-contracts/greeter.json");
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assert_has_bytecode(artifact);
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}
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#[test]
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fn ignores_empty_bytecode() {
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let abi_str = r#"[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint64","name":"number","type":"uint64"}],"name":"MyEvent","type":"event"},{"inputs":[],"name":"greet","outputs":[],"stateMutability":"nonpayable","type":"function"}]"#;
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let s = format!(r#"{{"abi": {}, "bin" : "0x" }}"#, abi_str);
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match serde_json::from_str::<JsonAbi>(&s).unwrap() {
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JsonAbi::Object(abi) => {
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assert!(abi.bytecode.is_none());
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}
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_ => {
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panic!("expected abi object")
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}
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}
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let s = format!(r#"{{"abi": {}, "bytecode" : {{ "object": "0x" }} }}"#, abi_str);
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match serde_json::from_str::<JsonAbi>(&s).unwrap() {
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JsonAbi::Object(abi) => {
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assert!(abi.bytecode.is_none());
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}
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_ => {
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panic!("expected abi object")
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}
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}
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}
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}
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