Example subgraph, ethCall test to drive implementation (#18)

* Setup example subgraph. * Implement eth_call in subgraph. * eth-call test stub Co-authored-by: nabarun <nabarun@deepstacksoft.com>
2026-09-11 18:24:05 +00:00 · 2021-12-28 16:08:04 +05:30
parent f078db688a
commit d247815ce2
13 changed files with 3270 additions and 81 deletions
@@ -0,0 +1,64 @@
+import { Address, log } from '@graphprotocol/graph-ts';
+
+import {
+  Example1
+} from '../generated/Example1/Example1';
+
+// export function handleTest (event: Test): void {
+//   // Entities can be loaded from the store using a string ID; this ID
+//   // needs to be unique across all entities of the same type
+//   let entity = ExampleEntity.load(event.transaction.from.toHex());
+
+//   // Entities only exist after they have been saved to the store;
+//   // `null` checks allow to create entities on demand
+//   if (!entity) {
+//     entity = new ExampleEntity(event.transaction.from.toHex());
+
+//     // Entity fields can be set using simple assignments
+//     entity.count = BigInt.fromI32(0);
+//   }
+
+//   // BigInt and BigDecimal math are supported
+//   // entity.count = entity.count + BigInt.fromI32(1)
+
+//   // Entity fields can be set based on event parameters
+//   entity.param1 = event.params.param1;
+//   entity.param2 = event.params.param2;
+
+//   // Entities can be written to the store with `.save()`
+//   entity.save();
+
+//   // Note: If a handler doesn't require existing field values, it is faster
+//   // _not_ to load the entity from the store. Instead, create it fresh with
+//   // `new Entity(...)`, set the fields that should be updated and save the
+//   // entity back to the store. Fields that were not set or unset remain
+//   // unchanged, allowing for partial updates to be applied.
+
+//   // It is also possible to access smart contracts from mappings. For
+//   // example, the contract that has emitted the event can be connected to
+//   // with:
+//   //
+//   // let contract = Contract.bind(event.address)
+//   //
+//   // The following functions can then be called on this contract to access
+//   // state variables and other data:
+//   //
+//   // - contract.getMethod(...)
+// }
+
+export function testEthCall (): void {
+  log.debug('In test eth call', []);
+
+  // Bind the contract to the address that emitted the event.
+  // TODO: Address.fromString throws error in WASM module instantiation.
+  const contractAddress = Address.fromString('0xafAd925B5eAE1E370196cBa39893E858ff7257d5');
+  const contract = Example1.bind(contractAddress);
+
+  // Access functions by calling them.
+  const res = contract.try_getMethod();
+  if (res.reverted) {
+    log.debug('Contract eth call reverted', []);
+  } else {
+    log.debug('Contract eth call result', []);
+  }
+}