graph_native/
contract.rs

1use crate::abi::DecodedParam;
2use crate::types::{Address, BigInt};
3
4/// Result of a try_call — mirrors graph-ts ethereum.CallResult
5pub struct CallResult {
6    pub reverted: bool,
7    pub value: DecodedParam,
8}
9
10/// Bound contract for making eth_call.
11///
12/// PHASE C BLOCKER: call() and try_call() are stubs returning fake values.
13/// They need graph-node's EthereumAdapter (or the HostFn interface) to make
14/// real eth_call RPC requests. This requires:
15/// - Access to the chain adapter via HostFn[] passed through MappingContext
16/// - The block pointer for the call context
17/// - ABI encoding/decoding of function args and return values
18///
19/// Until Phase C wiring, any handler using Contract.call/try_call will get
20/// wrong results. The transpiler's call-graph analysis already marks these
21/// handlers as unsupported (WASM fallback), so stubs are never hit in practice.
22///
23/// Tests for contract calls are also blocked on Phase C — they require a
24/// running Ethereum node or mock adapter.
25pub struct Contract {
26    #[allow(dead_code)]
27    contract_type: String,
28    #[allow(dead_code)]
29    address: Address,
30}
31
32impl Contract {
33    pub fn bind(contract_type: &str, address: &Address) -> Self {
34        Contract {
35            contract_type: contract_type.to_string(),
36            address: address.clone(),
37        }
38    }
39
40    /// STUB: Always returns zero. Phase C will wire to EthereumAdapter via HostFn.
41    pub fn call(&self, _method: &str, _args: &[DecodedParam]) -> DecodedParam {
42        DecodedParam::Uint(BigInt::zero())
43    }
44
45    /// STUB: Always returns reverted. Phase C will wire to EthereumAdapter via HostFn.
46    pub fn try_call(&self, _method: &str, _args: &[DecodedParam]) -> CallResult {
47        CallResult {
48            reverted: true,
49            value: DecodedParam::Uint(BigInt::zero()),
50        }
51    }
52}
graph_native/contract.rs

graph_native/
contract.rs
