WIP deploy contract using builtin ABI package

Former-commit-id: 9ff3b6dfc6fc9f5bf8278eccef6eeb6bf9cd3434 [formerly 1282951d281590f65a7d8576c0535ce27d1d31ea]
Former-commit-id: 4a0607441cecc0c617dc1deda8a3a5b1291ef763

sharding/client_test.go

@@ -10,6 +10,7 @@ import (
 	"sync"
 	"testing"
 
+	ethereum "github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/core/types"
 
@@ -48,6 +49,10 @@ func (s *FakeEthService) GasPrice(ctx context.Context) (*big.Int, error) {
 	return big.NewInt(10000), nil
 }
 
+func (s *FakeEthService) EstimateGas(ctx context.Context, msg ethereum.CallMsg) ([]byte, error) {
+	return hexutil.MustDecode("0x1000000000"), nil
+}
+
 func (s *FakeEthService) GetTransactionCount(ctx context.Context, address common.Address, blockNr rpc.BlockNumber) (*hexutil.Uint64, error) {
 	return nil, nil
 }