Call eth_maxPriorityFeePerGas and returns a manual defined maxPriorityFeePerGas as a fallback

ethers/provider.nim

@@ -124,7 +124,7 @@ method getGasPrice*(
 
 method getMaxPriorityFeePerGas*(
     provider: Provider
-): Future[UInt256] {.base, async: (raises: [ProviderError, CancelledError]).} =
+): Future[UInt256] {.base, async: (raises: [CancelledError]).} =
   doAssert false, "not implemented"
 
 method getTransactionCount*(

ethers/providers/jsonrpc.nim

@@ -156,8 +156,14 @@ method getGasPrice*(
 
 method getMaxPriorityFeePerGas*(
     provider: JsonRpcProvider
-): Future[UInt256] {.async: (raises: [ProviderError, CancelledError]).} =
+): Future[UInt256] {.async: (raises: [CancelledError]).} =
+    try:
       convertError:
+        let client = await provider.client
+        return await client.eth_maxPriorityFeePerGas()
+    except ProviderError:
+      # If the provider does not provide the implementation
+      # let's just remove the manual value
       return provider.maxPriorityFeePerGas
 
 method getTransactionCount*(

ethers/providers/jsonrpc/signatures.nim

@@ -21,3 +21,4 @@ proc eth_newBlockFilter(): JsonNode
 proc eth_newFilter(filter: EventFilter): JsonNode
 proc eth_getFilterChanges(id: JsonNode): JsonNode
 proc eth_uninstallFilter(id: JsonNode): bool
+proc eth_maxPriorityFeePerGas(): UInt256

ethers/signer.nim

@@ -58,7 +58,7 @@ method getGasPrice*(
 
 method getMaxPriorityFeePerGas*(
     signer: Signer
-): Future[UInt256] {.async: (raises: [ProviderError, SignerError, CancelledError]).} =
+): Future[UInt256] {.async: (raises: [SignerError, CancelledError]).} =
   return await signer.provider.getMaxPriorityFeePerGas()
 
 method getTransactionCount*(