Blockchain Inspection

NOTE All other debug namespace APIs EXCEPT FOR the following APIs are restricted with rpc.unsafe-debug.disable flag:

VM Tracing APIs, however with limited functionality (only pre-defined tracers are allowed)
debug_dumpBlock, debug_dumpStateTrie, debug_getBlockRlp, debug_getModifiedAccountsByHash, debug_getModifiedAccountsByNumber, debug_getBadBlocks, debug_getModifiedStorageNodesByNumber
debug_metrics

debug_dumpBlock

Retrieves the state that corresponds to the block number and returns a list of accounts (including storage and code).

NOTE: This function correctly returns the state for a few latest, currently 4, block numbers. Retrieving older block state is restricted depending on the value set for the command-line option --state.block-interval (default: 128). This means that the function performs the state retrieval against only the block numbers that are multiples of state.block-interval. For example, when state.block-interval is 128, this function returns the state for the block numbers "0x0", "0x80", "0x100", "0x180", and so on. If the block number is not a multiple of state.block-interval, it returns 'missing trie node' error.

Client

메서드 호출

Console

debug.dumpBlock(number)

RPC

{"method": "debug_dumpBlock", "params": [number]}

Parameters

Name

Type

Description

block number 또는 hash

QUANTITY | TAG | HASH

정수 형태의 블록 번호 또는 기본 블록 파라미터 또는 블록 해시에서와 같이 "earliest", "latest", "pending"과 같이 상태를 나타내는 문자열입니다.

NOTE: In versions earlier than Klaytn v1.7.0, only hex string type is available.

Return Value

Type

Description

JSON string

블록 정보입니다.

Example

Console

> debug.dumpBlock("0x80")
{
  accounts: {
    0000000000000000000000000000000000000035: {
      balance: "12800000000000000000",
      code: "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",
      codeHash: "62b00472fac99d94ccc52f5addac43d54c129cd2c6d2357c9557abea67efdec5",
      nonce: 0,
      root: "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
      storage: {}
    },
    /...(skipped).../
      codeHash: "3f34b5d7038ae652086ba4847ede2668b26a50107c5258d1412f764b942e2661",
      nonce: 1,
      root: "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
      storage: {}
    }
  },
  root: "70383c826d1161ec2f12d799023317d8da7775dd47b8502d2d7ef646d094d3a5"
}

> debug.dumpBlock("0x81")
Error: missing trie node a573119868e0898fe5526732a079dd713c005fcbcce38dec5cae75af0378e4d3 (path )
    at web3.js:3239:20
    at web3.js:6447:15
    at web3.js:5181:36
    at <anonymous>:1:1

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_dumpBlock","params":["0x80"],"id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":{"root":"70383c826d1161ec2f12d799023317d8da7775dd47b8502d2d7ef646d094d3a5","accounts":{"0000000000000000000000000000000000000035":{"balance":"12800000000000000000","nonce":0,"root":"56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421","codeHash":"62b00472fac99d94ccc52f5addac43d54c129cd2c6d2357c9557abea67efdec5","code":"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","storage":{}},...(skipped)...}}}

debug_dumpStateTrie

Retrieves all state/storage tries of the given state root.

Client

Method Invocation

Console

debug.dumpStateTrie(number)

RPC

{"method": "debug_dumpStateTrie", "params": [number]}

Parameters

Name

Type

Description

number

int

블록 번호입니다.

Return Value

Type

Description

JSON string

상태 트라이 덤프값

Example

Console

> debug.dumpStateTrie(10)
{
    root: "70383c826d1161ec2f12d799023317d8da7775dd47b8502d2d7ef646d094d3a5",
    tries: [...]
}

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_dumpStateTrie","params":["0x80"],"id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":{"root":"70383c826d1161ec2f12d799023317d8da7775dd47b8502d2d7ef646d094d3a5","tries":[...]}}

debug_getBlockRlp

Retrieves and returns the RLP-encoded block by the block number.

Client

Method Invocation

Console

debug.getBlockRlp(number)

RPC

{"method": "debug_getBlockRlp", "params": [number]}

References: RLP

Parameters

Name

Type

Description

block number or hash

QUANTITY | TAG | HASH

Integer or hexadecimal block number, or the string "earliest", "latest" or "pending" as in the default block parameter, or block hash.

NOTE: In versions earlier than Klaytn v1.7.0, only integer type is available.

Return Value

Type

Description

string

RLP 인코딩된 블록입니다.

Example

Console

> debug.getBlockRlp(100)
"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"

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_getBlockRlp","params":['200'],"id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":"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"}

debug_getModifiedAccountsByHash

Returns all accounts that have changed between the two blocks specified by their block hashes. Changes made in endBlockHash are included, but changes made in startBlockHash are not. If endBlockHash is not given, it returns the accounts modified in the startBlockHash. A change is defined as a difference in nonce, balance, code hash, or storage hash.

Client

Method Invocation

Console

debug.getModifiedAccountsByNumber(startBlockHash, endBlockHash)

RPC

{"method": "debug_getModifiedAccountsByNumber", "params": [startBlockHash, endBlockHash]}

Parameters

Name

Type

Description

startBlockHash

32바이트 크기 DATA

확인할 범위의 첫 번째 블록 해시입니다.

endBlockHash

32-byte DATA

(선택 사항) 범위 내 마지막 블록 해시입니다.

Return Value

Type

Description

JSON string

지정한 두 블록 사이에 변경이 이루어진 계정들의 주소 목록입니다.

Example

Console

> debug.getModifiedAccountsByHash("0x583a02df4222c82d4ffe5d3658d0f7ac233f4dc5de83f6430d74199038b606b6", "0x69833f0fc012dc36be910aa6909f5395cd35136dbeae29ed2170a7d4162a009c")

["0x31b93ca83b5ad17582e886c400667c6f698b8ccd", "0xb7fe15c42e66bd71835b07dc6e7daee7729f6235", "0xe31a0edb11357dba71377e625fc6174da4ef4321", "0x16b11cf9c2186a117b0da38315b42b1eaa03bbe5", "0xd3ec3c7e4cad042dbdcb6a7e0fdbc55a92276f12", "0xa4e0d726ce51572e66295756ad93206592c43a59", "0xf65e07b6626ab43ecea744803fa46bd4a89bfdb6", "0xaac56dfe44f9894d4f536cd17acfbc44bf81a843", "0x3855407fa65c4c5104648b3a9e495072df62b585", "0x61a7cbdd597848494fa85cbb76f9c63ad9c06cad", "0xa4845491cb0dad5bd6707a33c02af0d9db435c15", "0x026e8f70a26b6e5c8bec25e23869846edfdd6728", "0x3cf3e8caea91501321feee0f0692fcd98f1c6292", "0x18822790d7baf2fa6bbca6ad8baa46985abeb81b"]

HTTP RPC

curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_getModifiedAccountsByHash","params":["0x583a02df4222c82d4ffe5d3658d0f7ac233f4dc5de83f6430d74199038b606b6", "0x69833f0fc012dc36be910aa6909f5395cd35136dbeae29ed2170a7d4162a009c"],"id":1}' https://public-en-baobab.klaytn.net

{"jsonrpc":"2.0","id":1,"result":["0x31b93ca83b5ad17582e886c400667c6f698b8ccd","0xb7fe15c42e66bd71835b07dc6e7daee7729f6235","0xe31a0edb11357dba71377e625fc6174da4ef4321","0x16b11cf9c2186a117b0da38315b42b1eaa03bbe5","0xd3ec3c7e4cad042dbdcb6a7e0fdbc55a92276f12","0xa4e0d726ce51572e66295756ad93206592c43a59","0xf65e07b6626ab43ecea744803fa46bd4a89bfdb6","0xaac56dfe44f9894d4f536cd17acfbc44bf81a843","0x3855407fa65c4c5104648b3a9e495072df62b585","0x61a7cbdd597848494fa85cbb76f9c63ad9c06cad","0xa4845491cb0dad5bd6707a33c02af0d9db435c15","0x026e8f70a26b6e5c8bec25e23869846edfdd6728","0x3cf3e8caea91501321feee0f0692fcd98f1c6292","0x18822790d7baf2fa6bbca6ad8baa46985abeb81b"]}

debug_getModifiedAccountsByNumber

Returns all accounts that have changed between the two blocks specified by their block numbers. Changes made in endBlockNum are included, but changes made in startBlockNum are not. If endBlockNum is not given, it returns the accounts modified in the startBlockNum. A change is defined as a difference in nonce, balance, code hash, or storage hash.

Client

Method Invocation

Console

debug.getModifiedAccountsByNumber(startBlockNum, endBlockNum)

RPC

{"method": "debug_getModifiedAccountsByNumber", "params": [startBlockNum, endBlockNum]}

Parameters

Name

Type

Description

startBlockNum

int

확인할 범위의 첫 번째 블록 번호입니다.

endBlockNum

int

(선택 사항) 범위 내 마지막 블록 번호입니다.

Return Value

Type

Description

JSON string

The list of addresses modified between the given range.

Example

Console

> debug.getModifiedAccountsByNumber(171904, 172160)
["0x31b93ca83b5ad17582e886c400667c6f698b8ccd", "0xb7fe15c42e66bd71835b07dc6e7daee7729f6235", "0xe31a0edb11357dba71377e625fc6174da4ef4321", "0x16b11cf9c2186a117b0da38315b42b1eaa03bbe5", "0xd3ec3c7e4cad042dbdcb6a7e0fdbc55a92276f12", "0xa4e0d726ce51572e66295756ad93206592c43a59", "0xf65e07b6626ab43ecea744803fa46bd4a89bfdb6", "0xaac56dfe44f9894d4f536cd17acfbc44bf81a843", "0x3855407fa65c4c5104648b3a9e495072df62b585", "0x61a7cbdd597848494fa85cbb76f9c63ad9c06cad", "0xa4845491cb0dad5bd6707a33c02af0d9db435c15", "0x026e8f70a26b6e5c8bec25e23869846edfdd6728", "0x3cf3e8caea91501321feee0f0692fcd98f1c6292", "0x18822790d7baf2fa6bbca6ad8baa46985abeb81b"]

HTTP RPC

curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_getModifiedAccountsByNumber","params":[171904, 172160],"id":1}' https://public-en-baobab.klaytn.net

{"jsonrpc":"2.0","id":1,"result":["0x31b93ca83b5ad17582e886c400667c6f698b8ccd","0xb7fe15c42e66bd71835b07dc6e7daee7729f6235","0xe31a0edb11357dba71377e625fc6174da4ef4321","0x16b11cf9c2186a117b0da38315b42b1eaa03bbe5","0xd3ec3c7e4cad042dbdcb6a7e0fdbc55a92276f12","0xa4e0d726ce51572e66295756ad93206592c43a59","0xf65e07b6626ab43ecea744803fa46bd4a89bfdb6","0xaac56dfe44f9894d4f536cd17acfbc44bf81a843","0x3855407fa65c4c5104648b3a9e495072df62b585","0x61a7cbdd597848494fa85cbb76f9c63ad9c06cad","0xa4845491cb0dad5bd6707a33c02af0d9db435c15","0x026e8f70a26b6e5c8bec25e23869846edfdd6728","0x3cf3e8caea91501321feee0f0692fcd98f1c6292","0x18822790d7baf2fa6bbca6ad8baa46985abeb81b"]}

debug_preimage

Returns the preimage for a sha3 hash, if known.

Client

Method Invocation

Console

debug.preimage(hash)

RPC

{"method": "debug_preimage", "params": [hash]}

Parameters

Name

Type

Description

hash

string

sha3 해시

Return Value

Name

Type

Description

preimage

string

입력으로 받은 sha3 해시의 역상입니다.

Example

Console

> debug.preimage("0xaf953a2d01f55cfe080c0c94150a60105e8ac3d51153058a1f03dd239dd08586")
"0xdd738d9a7d987a98798123b2322d389470328420bb3d84023a8405a5523cc532235ba325235243242cb9a4758609a8604 ...  98bbd743053d0cbadaaccd4865cc0348685460ada874506ad984506ad80458ad69038fd6f908340fd9af68faf903760"

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_preimage","params":["0xaf953a2d01f55cfe080c0c94150a60105e8ac3d51153058a1f03dd239dd08586"],"id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":"0xaf953a2d01f55cfe080c0c94150a60105e8ac3d51153058a1f03dd239dd08586")
"0xdd738d9a7d987a98798123b2322d389470328420bb3d84023a8405a5523cc532235ba325235243242cb9a4758609a8604 ...  98bbd743053d0cbadaaccd4865cc0348685460ada874506ad984506ad80458ad69038fd6f908340fd9af68faf903760"}

debug_getBadBlocks

Returns a list of the last 'bad blocks' that the client has seen on the network.

Client

Method Invocation

Console

debug.getBadBlocks()

RPC

{"method": "debug_getBadBlocks", "params": []}

Parameters

None

Return Value

Name

Type

Description

badBlock

JSON

블록 해시의 JSON 목록입니다.

Example

Console

> debug.getBadBlocks()
[]

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_getBadBlocks","params":[],"id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":[]}

debug_printBlock

Retrieves a block and returns its pretty printed form.

Client

Method Invocation

Console

debug.printBlock(number)

RPC

{"method": "debug_printBlock", "params": [number]}

Parameters

Name

Type

Description

block number or hash

QUANTITY | TAG | HASH

Integer or hexadecimal block number, or the string "earliest", "latest" or "pending" as in the default block parameter, or block hash.

NOTE: In versions earlier than Klaytn v1.7.0, only integer type is available.

Return Value

Type

Description

string

블록 구조체의 덤프입니다.

Example

Console

> debug.printBlock(65120)
"(*types.Block)(0xc436fad3b0)(Block(#65120): Size: 2.95 kB {\nMinerHash: 7a5f8d37d34be6d9d19c5f161756d607da62227bb725ddb2f372682d7a9f1445\nHeader(e96d6477acfeba8ba865c315020471dcf751aa1bddca77f469334ab0492d218f):\n[\n\tParentHash:      e768b5b7eeb1005fe130c26da744d47e042e9227cee675fa70c89ede38653aea\n\tCoinbase:         0000000000000000000000000000000000000000\n\tRewardbase:       0000000000000000000000000000000000000000\n\tRoot: ... 0xc3be927ae5c0c48a0c83a1dbdf2df737c4a708eb6dae0ccb4a7eb042ea0a6ebf\n\tS:       0x53d8bed6357f88c8bab1f3d83942aa53c14269e58016e284656b12996a5d759a\n\tHex:      f863829d9280825208949619a83fcefc5647736cfd28845fcc4f716ff53b8080820fe7a0c3be927ae5c0c48a0c83a1dbdf2df737c4a708eb6dae0ccb4a7eb042ea0a6ebfa053d8bed6357f88c8bab1f3d83942aa53c14269e58016e284656b12996a5d759a\n]\n}\n)\n"

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_printBlock","params":[65120],"id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":"(*types.Block)(0xc4355b05a0)(Block(#65120): Size: 2.95 kB {\nMinerHash: 7a5f8d37d34be6d9d19c5f161756d607da62227bb725ddb2f372682d7a9f1445\nHeader(e96d6477acfeba8ba865c315020471dcf751aa1bddca77f469334ab0492d218f):\n[\n\tParentHash:       e768b5b7eeb1005fe130c26da744d47e042e9227cee675fa70c89ede38653aea\n\tCoinbase:         0000000000000000000000000000000000000000\n\tRewardbase:  ... 0000000000000000000000000000000000000000\n\tRoot:             4fd68a8f550cbd9ad665bc1a8021882ced5e1859fd9e28a48cb2910532b6ef27\n\tTxSha:            e3dbb8245038adcdc849de54af1d05f0c36c4c20d2710e31d525bd012d20a193\n\tReceiptSha:       212d4f453a897e2a486c86a4b120c1a850e89753865fe7f1aafa4"}

debug_setHead

WARNING: This API is not yet implemented and always returns "not yet implemented API" error.

Sets the current head of the local chain by block number.

NOTE: This is a destructive action and may severely damage your chain. Use with extreme caution.

Client

Method Invocation

Console

debug.setHead(number)

RPC

{"method": "debug_setHead", "params": [number]}

Parameters

Name

Type

Description

number

string

16진수 문자열 형태의 블록 번호입니다.

Return Value

None

Example

Console

> debug.setHead("0x100")
null

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_setHead","params":["0x100"],"id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":null}

debug_seedHash

Retrieves the seed hash of a block.

Client

Method Invocation

Console

debug.seedHash(number)

RPC

{"method": "debug_seedHash", "params": [number]}

Parameters

Name

Type

Description

number

uint64

The block number.

Return Value

Name

Type

Description

seedHash

string

블록 시드 해시입니다.

Example

Console

> debug.seedHash(100)
"0x0000000000000000000000000000000000000000000000000000000000000000"

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_seedHash","params":[100],"id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":"0x0000000000000000000000000000000000000000000000000000000000000000"}

debug_startWarmUp

The startWarmUp iterates the latest state trie to warm-up the trie cache. The iteration will be automatically stopped if 90% of the trie cache is full. The method returns an error if it fails in starting a warm-up, or null if it successfully has started it.

Client

Method invocation

Console

debug.startWarmUp()

RPC

{"method": "debug_startWarmUp"}

Parameters

None

Return Value

Type

Description

Error

트리 캐시 채우기를 시작하는 데에 성공했다면 null을 반환하고 그렇지 않으면 에러를 반환합니다.

Example

Console

> debug.startWarmUp()
null

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_startWarmUp","id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":null}

debug_startContractWarmUp

The startContractWarmUp iterates the latest storage trie of the given contract address to warm-up the trie cache. The iteration will be automatically stopped if 90% of the trie cache is full. The method returns an error if it fails in starting a warm-up or the given address is not a contract address, or null if it successfully has started it.

Client

Method invocation

Console

debug.startContractWarmUp(address)

RPC

{"method": "debug_startContractWarmUp", "params": [address]}

Parameters

Type

Description

20바이트 크기 DATA

컨트랙트 주소입니다.

Return Value

Type

Description

Error

null if a warm-up is started, or an error if not.

Example

Console

> debug.startContractWarmUp("0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b")
null

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_startContractWarmUp", "params":["0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b"], "id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":null}

debug_stopWarmUp

The stopWarmUp stops the currently running warm-up. This method takes no parameters, and returns null or an error depending on a warm-up was stopped or not.

Client

Method invocation

Console

debug.stopWarmUp()

RPC

{"method": "stopWarmUp"}

Parameters

None

Return Value

Type

Description

Error

트리 캐시 채우기를 중단하는 데에 성공했다면 null를 반환하고 그렇지 않으면 에러를 반환합니다.

Example

Console

> debug.stopWarmUp()
true

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_stopWarmUp","id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":null}

debug_startCollectingTrieStats

The startCollectingTrieStats iterates the latest state or storage trie to collect trie statistics. It collects storage trie statistics of the contract in the given address. If an empty address(="0x00...00") is given, it collects statistics of the whole state trie. Statistics will be logged every minute before end, containing overall and depth-by-depth information. The method returns an error if it fails in starting a task, or null if it successfully has started it.

Client

Method invocation

Console

debug.startCollectingTrieStats(address)

RPC

{"method": "debug_startCollectingTrieStats", "params": [address]}

Parameters

Type

Description

20-byte DATA

컨트랙트 주소입니다.

Return Value

Type

Description

Error

트리 통계 수집이 시작되었을 시 null를 반환하며, 그렇지 않을 경우 에러를 반환합니다.

Example

Console

// empty address to collect whole state trie statistics
> debug.startCollectingTrieStats("0x0000000000000000000000000000000000000000")
null
// contract address to collect storage trie statistics
> debug.startCollectingTrieStats("0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b")
null

HTTP RPC

$ curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_startCollectingTrieStats", "params":["0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b"], "id":1}' https://public-en-baobab.klaytn.net
{"jsonrpc":"2.0","id":1,"result":null}

Log

INFO[03/10,12:03:12 +09] [5] Started collecting trie statistics        blockNum=1491072 root=0x64af12b6374b92f6db457fa1b98fe9522d9f36ba352e3c4e01cdb75f001e8264 len(children)=16
INFO[03/10,12:03:12 +09] [5] Finished collecting trie statistics       elapsed=95.152412ms numNodes=133036 numLeafNodes=95948 maxDepth=9
INFO[03/10,12:03:12 +09] [5] number of leaf nodes in a depth           depth=5 numNodes=22098
INFO[03/10,12:03:12 +09] [5] number of leaf nodes in a depth           depth=6 numNodes=65309
INFO[03/10,12:03:12 +09] [5] number of leaf nodes in a depth           depth=7 numNodes=8083
INFO[03/10,12:03:12 +09] [5] number of leaf nodes in a depth           depth=8 numNodes=456
INFO[03/10,12:03:12 +09] [5] number of leaf nodes in a depth           depth=9 numNodes=2

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