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