accounts/abi/bind: fix bounded contracts and sim backend for 1559 (#23038)

* accounts/abi/bind: fix bounded contracts and sim backend for 1559

* accounts/abi/bind, ethclient: don't rely on chain config for gas prices

* all: enable London for all internal tests

* les: get receipt type info in les tests

* les: fix weird test

Co-authored-by: Martin Holst Swende <martin@swende.se>

ethclient/ethclient.go

@@ -502,6 +502,16 @@ func (ec *Client) SuggestGasPrice(ctx context.Context) (*big.Int, error) {
 	return (*big.Int)(&hex), nil
 }
 
+// SuggestGasTipCap retrieves the currently suggested gas tip cap after 1559 to
+// allow a timely execution of a transaction.
+func (ec *Client) SuggestGasTipCap(ctx context.Context) (*big.Int, error) {
+	var hex hexutil.Big
+	if err := ec.c.CallContext(ctx, &hex, "eth_maxPriorityFeePerGas"); err != nil {
+		return nil, err
+	}
+	return (*big.Int)(&hex), nil
+}
+
 // EstimateGas tries to estimate the gas needed to execute a specific transaction based on
 // the current pending state of the backend blockchain. There is no guarantee that this is
 // the true gas limit requirement as other transactions may be added or removed by miners,