rpc: separate out golang API into rpc/core

rpc/core/blocks.go

@@ -0,0 +1,44 @@
+package core
+
+import (
+	"fmt"
+	. "github.com/tendermint/tendermint/common"
+	"github.com/tendermint/tendermint/types"
+)
+
+//-----------------------------------------------------------------------------
+
+func BlockchainInfoHandler(minHeight, maxHeight uint) (uint, []*types.BlockMeta) {
+	if maxHeight == 0 {
+		maxHeight = blockStore.Height()
+	} else {
+		maxHeight = MinUint(blockStore.Height(), maxHeight)
+	}
+	if minHeight == 0 {
+		minHeight = uint(MaxInt(1, int(maxHeight)-20))
+	}
+	log.Debug("BlockchainInfoHandler", "maxHeight", maxHeight, "minHeight", minHeight)
+
+	blockMetas := []*types.BlockMeta{}
+	for height := maxHeight; height >= minHeight; height-- {
+		blockMeta := blockStore.LoadBlockMeta(height)
+		blockMetas = append(blockMetas, blockMeta)
+	}
+
+	return blockStore.Height(), blockMetas
+}
+
+//-----------------------------------------------------------------------------
+
+func GetBlockHandler(height uint) (*types.BlockMeta, *types.Block, error) {
+	if height == 0 {
+		return nil, nil, fmt.Errorf("height must be greater than 1")
+	}
+	if height > blockStore.Height() {
+		return nil, nil, fmt.Errorf("height must be less than the current blockchain height")
+	}
+
+	blockMeta := blockStore.LoadBlockMeta(height)
+	block := blockStore.LoadBlock(height)
+	return blockMeta, block, nil
+}