cancel transaction after estimateGas failure

ethers/contract.nim

@@ -123,7 +123,7 @@ proc send(contract: Contract,
          Future[?TransactionResponse] {.async.} =
   if signer =? contract.signer:
     let transaction = createTransaction(contract, function, parameters, overrides)
-    let populated = await signer.populateTransaction(transaction)
+    let populated = await signer.populateTransaction(transaction, cancelOnEstimateGasError = true)
     let txResp = await signer.sendTransaction(populated)
     return txResp.some
   else:

ethers/signer.nim

@@ -1,7 +1,12 @@
 import ./basics
 import ./provider
+import pkg/chronicles
 
 export basics
+export chronicles
+
+logScope:
+  topics = "ethers signer"
 
 type
   Signer* = ref object of RootObj
@@ -87,7 +92,8 @@ method decreaseNonce*(signer: Signer) {.base, gcsafe.} =
     signer.lastSeenNonce = some lastSeen - 1
 
 method populateTransaction*(signer: Signer,
-                            transaction: Transaction):
+                            transaction: Transaction,
+                            cancelOnEstimateGasError = false):
                            Future[Transaction] {.base, async.} =
 
   if sender =? transaction.sender and sender != await signer.getAddress():

testmodule/testContracts.nim

@@ -9,6 +9,7 @@ import ./hardhat
 import ./helpers
 import ./miner
 import ./mocks
+import ./examples
 
 type
   TestToken = ref object of Erc20Token