feature: DynSolCall (#632)

* feature: DynSolCall

* lint: clippy

* Update crates/dyn-abi/src/eip712/mod.rs

Co-authored-by: DaniPopes <[email protected]>

* fix: revert crates/dyn-abi/src/ext/abi.rs

---------

Co-authored-by: DaniPopes <[email protected]>

crates/dyn-abi/src/dynamic/call.rs

@@ -0,0 +1,156 @@
+use crate::{DynSolType, DynSolValue, Error, Result};
+use alloy_primitives::Selector;
+use alloy_sol_types::abi::Decoder;
+
+#[cfg(not(feature = "std"))]
+use alloc::{string::String, vec::Vec};
+
+/// A representation of a Solidity call
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct DynSolCall {
+    /// The selector of the call.
+    selector: Selector,
+    /// The types of the call.
+    parameters: Vec<DynSolType>,
+    /// The method name of the call, if available.
+    method: Option<String>,
+    /// The types of the call's returns.
+    returns: DynSolReturns,
+}
+
+impl DynSolCall {
+    /// Create a new `DynSolCall` with the given selector and types.
+    pub fn new(
+        selector: Selector,
+        parameters: Vec<DynSolType>,
+        method: Option<String>,
+        returns: DynSolReturns,
+    ) -> Self {
+        Self { selector, parameters, method, returns }
+    }
+
+    /// Get the selector of the call.
+    pub const fn selector(&self) -> Selector {
+        self.selector
+    }
+
+    /// Get the types of the call.
+    pub fn types(&self) -> &[DynSolType] {
+        &self.parameters
+    }
+
+    /// Get the method name of the call (if available)
+    pub fn method(&self) -> Option<&str> {
+        self.method.as_deref()
+    }
+
+    /// ABI encode the given values as function params.
+    pub fn abi_encode_input(&self, values: &[DynSolValue]) -> Result<Vec<u8>> {
+        encode_typeck(&self.parameters, values).map(prefix_selector(self.selector))
+    }
+
+    /// ABI encode the given values as function params without prefixing the
+    /// selector.
+    pub fn abi_encode_input_raw(&self, values: &[DynSolValue]) -> Result<Vec<u8>> {
+        encode_typeck(&self.parameters, values)
+    }
+
+    /// ABI decode the given data as function returns.
+    pub fn abi_decode_input(&self, data: &[u8], validate: bool) -> Result<Vec<DynSolValue>> {
+        abi_decode(data, &self.parameters, validate)
+    }
+
+    /// ABI encode the given values as function return values.
+    pub fn abi_encode_output(&self, values: &[DynSolValue]) -> Result<Vec<u8>> {
+        self.returns.abi_encode_output(values)
+    }
+
+    /// ABI decode the given data as function return values.
+    pub fn abi_decode_output(&self, data: &[u8], validate: bool) -> Result<Vec<DynSolValue>> {
+        self.returns.abi_decode_output(data, validate)
+    }
+}
+
+/// A representation of a Solidity call's returns.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct DynSolReturns(Vec<DynSolType>);
+
+impl From<Vec<DynSolType>> for DynSolReturns {
+    fn from(types: Vec<DynSolType>) -> Self {
+        Self(types)
+    }
+}
+
+impl From<DynSolReturns> for Vec<DynSolType> {
+    fn from(returns: DynSolReturns) -> Vec<DynSolType> {
+        returns.0
+    }
+}
+
+impl DynSolReturns {
+    /// Create a new `DynSolReturns` with the given types.
+    pub fn new(types: Vec<DynSolType>) -> Self {
+        Self(types)
+    }
+
+    /// Get the types of the returns.
+    pub fn types(&self) -> &[DynSolType] {
+        &self.0
+    }
+
+    /// ABI encode the given values as function return values.
+    pub fn abi_encode_output(&self, values: &[DynSolValue]) -> Result<Vec<u8>> {
+        encode_typeck(self.types(), values)
+    }
+
+    /// ABI decode the given data as function return values.
+    pub fn abi_decode_output(&self, data: &[u8], validate: bool) -> Result<Vec<DynSolValue>> {
+        abi_decode(data, self.types(), validate)
+    }
+}
+
+#[inline]
+pub(crate) fn prefix_selector(selector: Selector) -> impl FnOnce(Vec<u8>) -> Vec<u8> {
+    move |data| {
+        let mut new = Vec::with_capacity(data.len() + 4);
+        new.extend_from_slice(&selector[..]);
+        new.extend_from_slice(&data[..]);
+        new
+    }
+}
+
+pub(crate) fn encode_typeck(tys: &[DynSolType], values: &[DynSolValue]) -> Result<Vec<u8>> {
+    if values.len() != tys.len() {
+        return Err(Error::EncodeLengthMismatch { expected: tys.len(), actual: values.len() });
+    }
+
+    for (value, ty) in core::iter::zip(values, tys) {
+        if !ty.matches(value) {
+            return Err(Error::TypeMismatch {
+                expected: ty.sol_type_name().into_owned(),
+                actual: value.sol_type_name().unwrap_or_else(|| "<none>".into()).into_owned(),
+            });
+        }
+    }
+
+    Ok(abi_encode(values))
+}
+
+#[inline]
+pub(crate) fn abi_encode(values: &[DynSolValue]) -> Vec<u8> {
+    DynSolValue::encode_seq(values)
+}
+
+pub(crate) fn abi_decode(
+    data: &[u8],
+    tys: &[DynSolType],
+    validate: bool,
+) -> Result<Vec<DynSolValue>> {
+    let mut values = Vec::with_capacity(tys.len());
+    let mut decoder = Decoder::new(data, validate);
+    for ty in tys {
+        let value = ty.abi_decode_inner(&mut decoder, crate::DynToken::decode_single_populate)?;
+        values.push(value);
+    }
+    Ok(values)
+}

crates/dyn-abi/src/dynamic/mod.rs

@@ -4,6 +4,9 @@ pub use error::{DecodedError, DynSolError};
 mod event;
 pub use event::{DecodedEvent, DynSolEvent};
 
+mod call;
+pub use call::{DynSolCall, DynSolReturns};
+
 pub(crate) mod ty;
 pub use ty::DynSolType;
 

crates/dyn-abi/src/eip712/mod.rs

@@ -16,3 +16,40 @@ mod resolver;
 pub use resolver::{PropertyDef, Resolver, TypeDef};
 
 pub(crate) mod coerce;
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use alloy_primitives::B256;
+    use alloy_sol_types::SolStruct;
+
+    #[test]
+    fn repro_i128() {
+        alloy_sol_types::sol! {
+            #[derive(serde::Serialize)]
+            struct Order {
+                bytes32 sender;
+                int128 priceX18;
+                int128 amount;
+                uint64 expiration;
+                uint64 nonce;
+            }
+        }
+
+        let msg = Order {
+            sender: B256::repeat_byte(3),
+            priceX18: -1000000000000000,
+            amount: 2,
+            expiration: 3,
+            nonce: 4,
+        };
+
+        let domain = Default::default();
+
+        let static_sh = msg.eip712_signing_hash(&domain);
+
+        let fromst = TypedData::from_struct(&msg, Some(domain));
+        let dyn_sh = fromst.eip712_signing_hash();
+        assert_eq!(static_sh, dyn_sh.unwrap());
+    }
+}

crates/dyn-abi/src/lib.rs

@@ -38,7 +38,8 @@ mod coerce;
 
 mod dynamic;
 pub use dynamic::{
-    DecodedError, DecodedEvent, DynSolError, DynSolEvent, DynSolType, DynSolValue, DynToken,
+    DecodedError, DecodedEvent, DynSolCall, DynSolError, DynSolEvent, DynSolReturns, DynSolType,
+    DynSolValue, DynToken,
 };
 
 mod error;

crates/dyn-abi/src/specifier.rs

@@ -2,9 +2,9 @@
 //!
 //! This is a simple representation of Solidity type grammar.
 
-use crate::{DynSolType, Result};
+use crate::{DynSolCall, DynSolType, Result};
 use alloc::vec::Vec;
-use alloy_json_abi::{EventParam, Param};
+use alloy_json_abi::{EventParam, Function, Param};
 use parser::{ParameterSpecifier, Parameters, RootType, TupleSpecifier, TypeSpecifier, TypeStem};
 
 #[cfg(feature = "eip712")]
@@ -155,6 +155,24 @@ impl Specifier<DynSolType> for EventParam {
     }
 }
 
+impl Specifier<DynSolCall> for Function {
+    #[inline]
+    fn resolve(&self) -> Result<DynSolCall> {
+        let selector = self.selector();
+        let parameters =
+            self.inputs.iter().map(Specifier::<DynSolType>::resolve).collect::<Result<Vec<_>>>()?;
+        let returns = self
+            .outputs
+            .iter()
+            .map(Specifier::<DynSolType>::resolve)
+            .collect::<Result<Vec<_>>>()?
+            .into();
+        let method = self.name.clone();
+
+        Ok(DynSolCall::new(selector, parameters, Some(method), returns))
+    }
+}
+
 fn resolve_param(
     ty: &str,
     components: &[Param],