fix(miner): Do not use pending block for now (#1255)

eth/polar/api_backend.go

@@ -243,8 +243,10 @@ func (b *backend) BlockByNumber(_ context.Context, number rpc.BlockNumber) (*typ
 	// Pending block is only known by the miner
 	switch number {
 	case rpc.PendingBlockNumber:
-		block := b.polar.miner.PendingBlock()
-		return block, nil
+		header := b.polar.blockchain.CurrentBlock()
+		return b.polar.blockchain.GetBlock(header.Hash(), header.Number.Uint64()), nil
+		// block := b.polar.miner.PendingBlock()
+		// return block, nil
 	// Otherwise resolve and return the block
 	case rpc.LatestBlockNumber:
 		header := b.polar.blockchain.CurrentBlock()
@@ -307,16 +309,25 @@ func (b *backend) StateAndHeaderByNumber(
 	ctx context.Context,
 	number rpc.BlockNumber,
 ) (state.StateDB, *types.Header, error) {
+	var header *types.Header
 	// Pending state is only known by the miner
 	if number == rpc.PendingBlockNumber {
-		block, state := b.polar.miner.Pending()
-		return state, block.Header(), nil
-	}
-	// Otherwise resolve the block number and return its state
-	header, err := b.HeaderByNumber(ctx, number)
-	if err != nil {
-		return nil, nil, err
+		header = b.polar.blockchain.CurrentBlock()
+		// The above code is returning a block from the blockchain based on the given header
+		// hash and block
+		// number.
+		// return b.polar.blockchain.GetBlock(header.Hash(), header.Number.Uint64()), nil
+		// block, state := b.polar.miner.Pending()
+		// return state, block.Header(), nil
+	} else {
+		// Otherwise resolve the block number and return its state
+		var err error
+		header, err = b.HeaderByNumber(ctx, number)
+		if err != nil {
+			return nil, nil, err
+		}
 	}
+
 	if header == nil {
 		// to match Geth
 		return nil, nil, core.ErrBlockNotFound