sendTransaction raises ProviderError instead of SignerError

Allows it to contain error data.
It is not the signing that fails, so it makes sense to
use an error type that indicates that the provider failed.

ethers/providers/jsonrpc.nim

@@ -324,9 +324,9 @@ method signMessage*(
 method sendTransaction*(
   signer: JsonRpcSigner,
   transaction: Transaction): Future[TransactionResponse]
-  {.async: (raises:[SignerError]).} =
+  {.async: (raises:[SignerError, ProviderError]).} =
 
-  convertSignerError:
+  convertError:
     if nonce =? transaction.nonce:
       signer.updateNonce(nonce)
     let

ethers/signer.nim

@@ -43,7 +43,7 @@ method signMessage*(
 method sendTransaction*(
   signer: Signer,
   transaction: Transaction): Future[TransactionResponse]
-  {.base, async: (raises:[SignerError]).} =
+  {.base, async: (raises:[SignerError, ProviderError]).} =
 
   doAssert false, "not implemented"
 

ethers/signers/wallet.nim

@@ -83,9 +83,8 @@ proc signTransaction*(wallet: Wallet,
 method sendTransaction*(
   wallet: Wallet,
   transaction: Transaction): Future[TransactionResponse]
-  {.async: (raises:[SignerError]).} =
+  {.async: (raises:[SignerError, ProviderError]).} =
 
-  convertError:
   let signed = await signTransaction(wallet, transaction)
   if nonce =? transaction.nonce:
     wallet.updateNonce(nonce)

testmodule/mocks.nim

@@ -20,6 +20,6 @@ method getAddress*(
 method sendTransaction*(
   signer: MockSigner,
   transaction: Transaction): Future[TransactionResponse]
-  {.async: (raises:[SignerError]).} =
+  {.async: (raises:[SignerError, ProviderError]).} =
 
   signer.transactions.add(transaction)

testmodule/providers/jsonrpc/testJsonRpcProvider.nim

@@ -97,7 +97,7 @@ for url in ["ws://localhost:8545", "http://localhost:8545"]:
         discard await provider.getBlock(BlockTag.latest)
       expect JsonRpcProviderError:
         discard await provider.subscribe(proc(_: Block) = discard)
-      expect JsonRpcSignerError:
+      expect JsonRpcProviderError:
         discard await provider.getSigner().sendTransaction(Transaction.example)
 
     test "syncing":