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385 lines
10 KiB
385 lines
10 KiB
package core
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import (
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"fmt"
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cmn "github.com/tendermint/tendermint/libs/common"
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ctypes "github.com/tendermint/tendermint/rpc/core/types"
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sm "github.com/tendermint/tendermint/state"
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"github.com/tendermint/tendermint/types"
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)
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// Get block headers for minHeight <= height <= maxHeight.
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// Block headers are returned in descending order (highest first).
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//
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// ```shell
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// curl 'localhost:26657/blockchain?minHeight=10&maxHeight=10'
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// ```
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//
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// ```go
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// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
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// info, err := client.BlockchainInfo(10, 10)
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// ```
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//
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// > The above command returns JSON structured like this:
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//
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// ```json
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// {
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// "error": "",
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// "result": {
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// "block_metas": [
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// {
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// "header": {
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// "app_hash": "",
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// "chain_id": "test-chain-6UTNIN",
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// "height": "10",
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// "time": "2017-05-29T15:05:53.877Z",
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// "num_txs": "0",
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// "last_block_id": {
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// "parts": {
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// "hash": "3C78F00658E06744A88F24FF97A0A5011139F34A",
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// "total": "1"
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// },
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// "hash": "F70588DAB36BDA5A953D548A16F7D48C6C2DFD78"
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// },
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// "last_commit_hash": "F31CC4282E50B3F2A58D763D233D76F26D26CABE",
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// "data_hash": "",
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// "validators_hash": "9365FC80F234C967BD233F5A3E2AB2F1E4B0E5AA"
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// },
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// "block_id": {
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// "parts": {
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// "hash": "277A4DBEF91483A18B85F2F5677ABF9694DFA40F",
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// "total": "1"
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// },
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// "hash": "96B1D2F2D201BA4BC383EB8224139DB1294944E5"
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// }
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// }
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// ],
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// "last_height": "5493"
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// },
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// "id": "",
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// "jsonrpc": "2.0"
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// }
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// ```
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//
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// <aside class="notice">Returns at most 20 items.</aside>
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func BlockchainInfo(minHeight, maxHeight int64) (*ctypes.ResultBlockchainInfo, error) {
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// maximum 20 block metas
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const limit int64 = 20
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var err error
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minHeight, maxHeight, err = filterMinMax(blockStore.Height(), minHeight, maxHeight, limit)
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if err != nil {
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return nil, err
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}
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logger.Debug("BlockchainInfoHandler", "maxHeight", maxHeight, "minHeight", minHeight)
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blockMetas := []*types.BlockMeta{}
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for height := maxHeight; height >= minHeight; height-- {
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blockMeta := blockStore.LoadBlockMeta(height)
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blockMetas = append(blockMetas, blockMeta)
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}
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return &ctypes.ResultBlockchainInfo{blockStore.Height(), blockMetas}, nil
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}
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// error if either min or max are negative or min < max
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// if 0, use 1 for min, latest block height for max
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// enforce limit.
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// error if min > max
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func filterMinMax(height, min, max, limit int64) (int64, int64, error) {
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// filter negatives
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if min < 0 || max < 0 {
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return min, max, fmt.Errorf("heights must be non-negative")
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}
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// adjust for default values
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if min == 0 {
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min = 1
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}
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if max == 0 {
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max = height
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}
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// limit max to the height
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max = cmn.MinInt64(height, max)
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// limit min to within `limit` of max
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// so the total number of blocks returned will be `limit`
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min = cmn.MaxInt64(min, max-limit+1)
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if min > max {
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return min, max, fmt.Errorf("min height %d can't be greater than max height %d", min, max)
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}
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return min, max, nil
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}
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// Get block at a given height.
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// If no height is provided, it will fetch the latest block.
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//
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// ```shell
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// curl 'localhost:26657/block?height=10'
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// ```
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//
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// ```go
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// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
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// info, err := client.Block(10)
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// ```
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//
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// > The above command returns JSON structured like this:
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//
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// ```json
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// {
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// "error": "",
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// "result": {
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// "block": {
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// "last_commit": {
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// "precommits": [
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// {
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// "signature": {
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// "data": "12C0D8893B8A38224488DC1DE6270DF76BB1A5E9DB1C68577706A6A97C6EC34FFD12339183D5CA8BC2F46148773823DE905B7F6F5862FD564038BB7AE03BF50D",
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// "type": "ed25519"
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// },
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// "block_id": {
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// "parts": {
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// "hash": "3C78F00658E06744A88F24FF97A0A5011139F34A",
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// "total": "1"
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// },
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// "hash": "F70588DAB36BDA5A953D548A16F7D48C6C2DFD78"
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// },
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// "type": "2",
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// "round": "0",
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// "height": "9",
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// "validator_index": "0",
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// "validator_address": "E89A51D60F68385E09E716D353373B11F8FACD62"
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// }
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// ],
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// "blockID": {
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// "parts": {
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// "hash": "3C78F00658E06744A88F24FF97A0A5011139F34A",
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// "total": "1"
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// },
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// "hash": "F70588DAB36BDA5A953D548A16F7D48C6C2DFD78"
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// }
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// },
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// "data": {
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// "txs": []
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// },
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// "header": {
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// "app_hash": "",
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// "chain_id": "test-chain-6UTNIN",
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// "height": "10",
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// "time": "2017-05-29T15:05:53.877Z",
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// "num_txs": "0",
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// "last_block_id": {
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// "parts": {
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// "hash": "3C78F00658E06744A88F24FF97A0A5011139F34A",
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// "total": "1"
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// },
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// "hash": "F70588DAB36BDA5A953D548A16F7D48C6C2DFD78"
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// },
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// "last_commit_hash": "F31CC4282E50B3F2A58D763D233D76F26D26CABE",
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// "data_hash": "",
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// "validators_hash": "9365FC80F234C967BD233F5A3E2AB2F1E4B0E5AA"
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// }
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// },
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// "block_meta": {
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// "header": {
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// "app_hash": "",
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// "chain_id": "test-chain-6UTNIN",
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// "height": "10",
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// "time": "2017-05-29T15:05:53.877Z",
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// "num_txs": "0",
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// "last_block_id": {
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// "parts": {
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// "hash": "3C78F00658E06744A88F24FF97A0A5011139F34A",
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// "total": "1"
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// },
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// "hash": "F70588DAB36BDA5A953D548A16F7D48C6C2DFD78"
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// },
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// "last_commit_hash": "F31CC4282E50B3F2A58D763D233D76F26D26CABE",
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// "data_hash": "",
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// "validators_hash": "9365FC80F234C967BD233F5A3E2AB2F1E4B0E5AA"
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// },
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// "block_id": {
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// "parts": {
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// "hash": "277A4DBEF91483A18B85F2F5677ABF9694DFA40F",
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// "total": "1"
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// },
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// "hash": "96B1D2F2D201BA4BC383EB8224139DB1294944E5"
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// }
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// }
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// },
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// "id": "",
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// "jsonrpc": "2.0"
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// }
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// ```
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func Block(heightPtr *int64) (*ctypes.ResultBlock, error) {
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storeHeight := blockStore.Height()
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height, err := getHeight(storeHeight, heightPtr)
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if err != nil {
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return nil, err
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}
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blockMeta := blockStore.LoadBlockMeta(height)
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block := blockStore.LoadBlock(height)
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return &ctypes.ResultBlock{blockMeta, block}, nil
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}
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// Get block commit at a given height.
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// If no height is provided, it will fetch the commit for the latest block.
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//
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// ```shell
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// curl 'localhost:26657/commit?height=11'
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// ```
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//
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// ```go
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// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
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// info, err := client.Commit(11)
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// ```
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//
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// > The above command returns JSON structured like this:
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//
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// ```json
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// {
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// "error": "",
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// "result": {
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// "canonical": true,
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// "commit": {
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// "precommits": [
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// {
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// "signature": {
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// "data": "00970429FEC652E9E21D106A90AE8C5413759A7488775CEF4A3F44DC46C7F9D941070E4FBE9ED54DF247FA3983359A0C3A238D61DE55C75C9116D72ABC9CF50F",
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// "type": "ed25519"
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// },
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// "block_id": {
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// "parts": {
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// "hash": "9E37CBF266BC044A779E09D81C456E653B89E006",
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// "total": "1"
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// },
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// "hash": "CC6E861E31CA4334E9888381B4A9137D1458AB6A"
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// },
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// "type": "2",
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// "round": "0",
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// "height": "11",
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// "validator_index": "0",
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// "validator_address": "E89A51D60F68385E09E716D353373B11F8FACD62"
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// }
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// ],
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// "blockID": {
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// "parts": {
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// "hash": "9E37CBF266BC044A779E09D81C456E653B89E006",
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// "total": "1"
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// },
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// "hash": "CC6E861E31CA4334E9888381B4A9137D1458AB6A"
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// }
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// },
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// "header": {
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// "app_hash": "",
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// "chain_id": "test-chain-6UTNIN",
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// "height": "11",
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// "time": "2017-05-29T15:05:54.893Z",
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// "num_txs": "0",
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// "last_block_id": {
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// "parts": {
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// "hash": "277A4DBEF91483A18B85F2F5677ABF9694DFA40F",
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// "total": "1"
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// },
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// "hash": "96B1D2F2D201BA4BC383EB8224139DB1294944E5"
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// },
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// "last_commit_hash": "3CE0C9727CE524BA9CB7C91E28F08E2B94001087",
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// "data_hash": "",
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// "validators_hash": "9365FC80F234C967BD233F5A3E2AB2F1E4B0E5AA"
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// }
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// },
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// "id": "",
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// "jsonrpc": "2.0"
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// }
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// ```
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func Commit(heightPtr *int64) (*ctypes.ResultCommit, error) {
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storeHeight := blockStore.Height()
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height, err := getHeight(storeHeight, heightPtr)
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if err != nil {
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return nil, err
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}
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header := blockStore.LoadBlockMeta(height).Header
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// If the next block has not been committed yet,
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// use a non-canonical commit
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if height == storeHeight {
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commit := blockStore.LoadSeenCommit(height)
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return ctypes.NewResultCommit(&header, commit, false), nil
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}
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// Return the canonical commit (comes from the block at height+1)
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commit := blockStore.LoadBlockCommit(height)
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return ctypes.NewResultCommit(&header, commit, true), nil
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}
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// BlockResults gets ABCIResults at a given height.
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// If no height is provided, it will fetch results for the latest block.
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//
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// Results are for the height of the block containing the txs.
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// Thus response.results[5] is the results of executing getBlock(h).Txs[5]
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//
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// ```shell
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// curl 'localhost:26657/block_results?height=10'
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// ```
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//
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// ```go
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// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
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// info, err := client.BlockResults(10)
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// ```
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//
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//
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// > The above command returns JSON structured like this:
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//
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// ```json
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// {
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// "height": "10",
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// "results": [
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// {
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// "code": "0",
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// "data": "CAFE00F00D"
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// },
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// {
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// "code": "102",
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// "data": ""
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// }
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// ]
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// }
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// ```
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func BlockResults(heightPtr *int64) (*ctypes.ResultBlockResults, error) {
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storeHeight := blockStore.Height()
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height, err := getHeight(storeHeight, heightPtr)
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if err != nil {
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return nil, err
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}
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// load the results
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results, err := sm.LoadABCIResponses(stateDB, height)
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if err != nil {
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return nil, err
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}
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res := &ctypes.ResultBlockResults{
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Height: height,
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Results: results,
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}
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return res, nil
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}
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func getHeight(currentHeight int64, heightPtr *int64) (int64, error) {
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if heightPtr != nil {
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height := *heightPtr
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if height <= 0 {
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return 0, fmt.Errorf("Height must be greater than 0")
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}
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if height > currentHeight {
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return 0, fmt.Errorf("Height must be less than or equal to the current blockchain height")
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}
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return height, nil
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}
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return currentHeight, nil
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}
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