trace Namespace

Through trace RPCs we can know the transaction executive details. To use these RPC Conflux archive node need set two additional config:

executive_trace = true
public_rpc_apis = "safe,trace"  // or public_rpc_apis = "all"

Note: An existing archive node need clear all blockchain data to open executive_trace config.

Note: From Conflux-rust v2.0 trace RPC have some breaking change, Read below for details.

Action object

An action object corresponds to an operation executed by the underlying EVM, which could be a call (call), contract creation (create), or an internal transfer (internal transfer). Currently, there are several types of actions:

call: Represents a method call operation.
call_result: Represents the result of a method call operation.
create: Represents a contract creation operation.
create_result: Represents the result of a contract creation operation.
internal_transfer_action: Represents an internal transfer operation.
set_auth: EIP-7702 setting authorization.
suicide: Contract self-destruct.

Among these, call and call_result, as well as create and create_result, always appear in pairs, while the other types appear individually.

call

Field	Type	Optional	Description
space	Space Enum
from	Address
to	Address
value	U256
gas	U256
input	Bytes
callType	CallType Enum

call_result

Field	Type	Description
outcome	ActionStatus Enum
gasLeft	U256
returnData	Bytes	When the outcome is success, returnData is the return value of the method call. When the outcome is revert, returnData is the ABI-encoded value of the revert string in the Solidity contract (Error(string)). When the outcome is failed, returnData is the string Error of the EVM contract execution failure.

create

Field	Type	Optional	Description
space	Space Enum
from	Address
value	U256
gas	U256
init	Bytes
createType	CreateType Enum

create_result

Field	Type	Description
outcome	ActionStatus Enum
addr	Address
gasLeft	U256
returnData	Bytes	When the outcome is success, returnData is the return value of the method call. When the outcome is revert, returnData is the ABI-encoded value of the revert string in the Solidity contract (Error(string)). When the outcome is failed, returnData is the string Error of the EVM contract execution failure.

internal_transfer_action

Field	Type	Optional	Description
fromSpace	Space Enum
fromPocket	Pocket Enum
from	Address
toSpace	Space Enum
toPocket	Pocket Enum
to	Address
value	U256

set_auth

Field	Type	Optional	Description
space	Space Enum
address	Address		Impl address
chainId	Uint256
nonce	Uint256
outcome	SetAuthOutcome Enum
author	Address	✅	The authorizer address

Note: Core Space does not support this type of action, which means that traces from Core Space will not contain this action type.

suicide

Field	Type	Description
space	Space Enum
address	Address	Contract address
balance	Uint256
refundAddress	Address	Refund address

Trace object

A Trace trace object contain below field:

Field	Type	Description
type	ActionType Enum
action	Action Object	Trace's action info，different type trace's action have different fields.
valid	Boolean

Example:

{
  "action": {
    "callType": "call",
    "from": "CFXTEST:TYPE.USER:AAJSUKECFVZF2MG8GZYR9GNAKZYSX9P6VU29DWZ6T2",
    "gas": "0x171e2",
    "input": "0x9c312cfd",
    "to": "CFXTEST:TYPE.CONTRACT:ACE8BSDS7WN52KHYK29NEBZWFPVZ5RPPD28KCXETJ8",
    "value": "0x1d6e3"
  },
  "type": "call",
  "valid": true
}

trace RPCs

trace_block

Get block traces by block hash

Parameters

DATA, 32 Bytes - hash of a block

Returns

BlockTrace - Block trace object

TransactionTrace object

Field	Type	Optional	Description
transactionHash	Hash
transactionPosition	QUANTITY
traces	Array of Trace

BlockTrace object

Field	Type	Optional	Description
blockHash	Hash
epochHash	Hash
epochNumber	QUANTITY
transactionTraces	Array of TransactionTrace

// Request
curl --location --request POST 'http://testnet-rpc:12537' \
--header 'Content-Type: application/json' \
--data-raw ' {
    "jsonrpc": "2.0",
    "id": "15922956697249514502",
    "method": "trace_block",
    "params": ["0x4c4db64db7ddaf4fd6c9d0eb5398d4c7838252ceaefdfb6b1be27aa301428369"]
  }'

// Response
{
    "jsonrpc": "2.0",
    "result": {
        "blockHash": "0x4c4db64db7ddaf4fd6c9d0eb5398d4c7838252ceaefdfb6b1be27aa301428369",
        "epochHash": "0x4c4db64db7ddaf4fd6c9d0eb5398d4c7838252ceaefdfb6b1be27aa301428369",
        "epochNumber": "0x28968d0",
        "transactionTraces": [
            {
                "traces": [
                    {
                        "action": {
                            "space": "native",
                            "callType": "call",
                            "from": "CFXTEST:TYPE.USER:AAJSUKECFVZF2MG8GZYR9GNAKZYSX9P6VU29DWZ6T2",
                            "gas": "0x171e2",
                            "input": "0x9c312cfd",
                            "to": "CFXTEST:TYPE.CONTRACT:ACE8BSDS7WN52KHYK29NEBZWFPVZ5RPPD28KCXETJ8",
                            "value": "0x1d6e3"
                        },
                        "valid": true,
                        "type": "call"
                    },
                    {
                        "action": {
                            "space": "native",
                            "callType": "call",
                            "from": "CFXTEST:TYPE.CONTRACT:ACE8BSDS7WN52KHYK29NEBZWFPVZ5RPPD28KCXETJ8",
                            "gas": "0x14ac7",
                            "input": "0xb281a7bd00000000000000000000000089e0b86eec97bc24f44e3eb206b22b235db58c1e",
                            "to": "CFXTEST:TYPE.CONTRACT:ACFNPY71HJHAMY075XYPS56124ZJE5154UX9NTE7VT",
                            "value": "0x1d6e3"
                        },
                        "valid": true,
                        "type": "call"
                    },
                    {
                        "action": {
                            "space": "native",
                            "callType": "delegatecall",
                            "from": "CFXTEST:TYPE.CONTRACT:ACFNPY71HJHAMY075XYPS56124ZJE5154UX9NTE7VT",
                            "gas": "0x14157",
                            "input": "0xb281a7bd00000000000000000000000089e0b86eec97bc24f44e3eb206b22b235db58c1e",
                            "to": "CFXTEST:TYPE.CONTRACT:ACEMTZA4ZJN1FCUTZWN6P8EKDBF2X8DCZY4TEESNH8",
                            "value": "0x1d6e3"
                        },
                        "valid": true,
                        "type": "call"
                    },
                    {
                        "action": {
                            "space": "native",
                            "callType": "staticcall",
                            "from": "CFXTEST:TYPE.CONTRACT:ACFNPY71HJHAMY075XYPS56124ZJE5154UX9NTE7VT",
                            "gas": "0x13464",
                            "input": "0xf0940002",
                            "to": "CFXTEST:TYPE.CONTRACT:ACE8BSDS7WN52KHYK29NEBZWFPVZ5RPPD28KCXETJ8",
                            "value": "0x0"
                        },
                        "valid": true,
                        "type": "call"
                    },
                    {
                        "action": {
                            "gasLeft": "0x11ae8",
                            "outcome": "success",
                            "returnData": "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"
                        },
                        "valid": true,
                        "type": "call_result"
                    },
                    {
                        "action": {
                            "space": "native",
                            "callType": "staticcall",
                            "from": "CFXTEST:TYPE.CONTRACT:ACFNPY71HJHAMY075XYPS56124ZJE5154UX9NTE7VT",
                            "gas": "0xce86",
                            "input": "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",
                            "to": "CFXTEST:TYPE.BUILTIN:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAJK7B54454",
                            "value": "0x0"
                        },
                        "valid": true,
                        "type": "call"
                    },
                    {
                        "action": {
                            "gasLeft": "0xcd8a",
                            "outcome": "success",
                            "returnData": "0xdccb9be50637c331c1c66ef1b0c2779f0a1893661c017c530b641dcec02010dc"
                        },
                        "valid": true,
                        "type": "call_result"
                    },
                    {
                        "action": {
                            "gasLeft": "0x8fe9",
                            "outcome": "success",
                            "returnData": "0x0000000000000000000000000000000000000000000000000000000000001662"
                        },
                        "valid": true,
                        "type": "call_result"
                    },
                    {
                        "action": {
                            "gasLeft": "0x94d5",
                            "outcome": "success",
                            "returnData": "0x0000000000000000000000000000000000000000000000000000000000001662"
                        },
                        "valid": true,
                        "type": "call_result"
                    },
                    {
                        "action": {
                            "gasLeft": "0x713e",
                            "outcome": "success",
                            "returnData": "0x"
                        },
                        "valid": true,
                        "type": "call_result"
                    }
                ],
                "transactionHash": "0x8437fd07e33ffaff9dc1b360cb8b0450847b15a164059b50736c65762e6629ad",
                "transactionPosition": "0x0"
            }
        ]
    },
    "id": "15922956697249514502"
}

trace_transaction

Get transaction's trace by it's hash

Parameters

DATA, 32 Bytes - hash of a transaction

Returns

Array - Array of LocalizedTrace info

LocalizedTrace Object

Field	Type	Description
type	ActionType Enum
blockHash	Hash	Hash of block
epochHash	Hash	Hash of epoch
epochNumber	QUANTITY	Number of epoch
transactionHash	Hash	Hash of transaction
transactionPosition	QUANTITY	Position of transaction in block
valid	Boolean
action	Action Object	Trace info

// Request
curl --location --request POST 'http://testnet-rpc:12537' \
--header 'Content-Type: application/json' \
--data-raw ' {
    "jsonrpc": "2.0",
    "id": "15922956697249514502",
    "method": "trace_transaction",
    "params": ["0x8437fd07e33ffaff9dc1b360cb8b0450847b15a164059b50736c65762e6629ad"]
  }'

// Response
{
    "jsonrpc": "2.0",
    "result": [
        {
            "type": "internal_transfer_action",
            "action": {
                "from": "CFX:TYPE.USER:AAR5P39N0JGA6GN2JB4Z93E46SU6BG7ARP8152HUR2",
                "fromPocket": "balance",
                "fromSpace": "native",
                "to": "CFX:TYPE.NULL:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA0SFBNJM2",
                "toPocket": "gas_payment",
                "toSpace": "none",
                "value": "0x1c13f6519ca00"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call",
            "action": {
                "space": "native",
                "from": "CFX:TYPE.USER:AAR5P39N0JGA6GN2JB4Z93E46SU6BG7ARP8152HUR2",
                "to": "CFX:TYPE.CONTRACT:ACAD67180SED348RWSFUR34DZ6VS8MMCAJ8TV9B69E",
                "value": "0x0",
                "gas": "0x73739",
                "input": "0xddbbce3b",
                "callType": "call"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call",
            "action": {
                "space": "native",
                "from": "CFX:TYPE.CONTRACT:ACAD67180SED348RWSFUR34DZ6VS8MMCAJ8TV9B69E",
                "to": "CFX:TYPE.CONTRACT:ACFVDMF5XK7R0FDH9FBGRX3D579D3M3EFJRH3BX1JJ",
                "value": "0x0",
                "gas": "0x706ac",
                "input": "0xddbbce3b",
                "callType": "delegatecall"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call",
            "action": {
                "space": "native",
                "from": "CFX:TYPE.CONTRACT:ACAD67180SED348RWSFUR34DZ6VS8MMCAJ8TV9B69E",
                "to": "CFX:TYPE.CONTRACT:ACCRDADJNXBX75X5MX6523FAJWX3K81B12EUGEC37V",
                "value": "0x0",
                "gas": "0x6ce13",
                "input": "0x82df7a3b",
                "callType": "staticcall"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call",
            "action": {
                "space": "native",
                "from": "CFX:TYPE.CONTRACT:ACCRDADJNXBX75X5MX6523FAJWX3K81B12EUGEC37V",
                "to": "CFX:TYPE.CONTRACT:ACF81PBPVSEP9HMCCWVHGP0SXX72EKTCNPZN8HBUE9",
                "value": "0x0",
                "gas": "0x69f2a",
                "input": "0x82df7a3b",
                "callType": "delegatecall"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call_result",
            "action": {
                "outcome": "success",
                "gasLeft": "0x418ce",
                "returnData": "0x0000000000000000000000000000000000000000000000000000000000000285"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call_result",
            "action": {
                "outcome": "success",
                "gasLeft": "0x4338a",
                "returnData": "0x0000000000000000000000000000000000000000000000000000000000000285"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call",
            "action": {
                "space": "native",
                "from": "CFX:TYPE.CONTRACT:ACAD67180SED348RWSFUR34DZ6VS8MMCAJ8TV9B69E",
                "to": "CFX:TYPE.BUILTIN:AAEJUAAAAAAAAAAAAAAAAAAAAAAAAAAAA2SN102VJV",
                "value": "0x0",
                "gas": "0x42724",
                "input": "0xbea05ee3e9af34e140ab2a30e1ec1f39917aa506504b8c320000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000002401cfc7f8000000000000000000000000000000000000000000000000000000000000028500000000000000000000000000000000000000000000000000000000",
                "callType": "call"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "internal_transfer_action",
            "action": {
                "from": "CFX:TYPE.BUILTIN:AAEJUAAAAAAAAAAAAAAAAAAAAAAAAAAAA2SN102VJV",
                "fromPocket": "balance",
                "fromSpace": "native",
                "to": "CFX:TYPE.UNKNOWN:AD9CWFZA79RKKB8FW3T6WJJNH6V4E99NVA4CJ5FFTP",
                "toPocket": "balance",
                "toSpace": "evm",
                "value": "0x0"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call_result",
            "action": {
                "outcome": "success",
                "gasLeft": "0x33d45",
                "returnData": "0x00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000000"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call",
            "action": {
                "space": "native",
                "from": "CFX:TYPE.CONTRACT:ACAD67180SED348RWSFUR34DZ6VS8MMCAJ8TV9B69E",
                "to": "CFX:TYPE.CONTRACT:ACCRDADJNXBX75X5MX6523FAJWX3K81B12EUGEC37V",
                "value": "0x0",
                "gas": "0x339f4",
                "input": "0xd68076c3000000000000000000000000803e76feb3883cebcd938b06e743af22ef294202",
                "callType": "staticcall"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call",
            "action": {
                "space": "native",
                "from": "CFX:TYPE.CONTRACT:ACCRDADJNXBX75X5MX6523FAJWX3K81B12EUGEC37V",
                "to": "CFX:TYPE.CONTRACT:ACF81PBPVSEP9HMCCWVHGP0SXX72EKTCNPZN8HBUE9",
                "value": "0x0",
                "gas": "0x32aa6",
                "input": "0xd68076c3000000000000000000000000803e76feb3883cebcd938b06e743af22ef294202",
                "callType": "delegatecall"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call_result",
            "action": {
                "outcome": "success",
                "gasLeft": "0x2d6b4",
                "returnData": "0x0000000000000000000000000000000000000000000000000000000000000000"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call_result",
            "action": {
                "outcome": "success",
                "gasLeft": "0x2e366",
                "returnData": "0x0000000000000000000000000000000000000000000000000000000000000000"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call_result",
            "action": {
                "outcome": "success",
                "gasLeft": "0x2ef0a",
                "returnData": "0x"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "call_result",
            "action": {
                "outcome": "success",
                "gasLeft": "0x30b6d",
                "returnData": "0x"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        },
        {
            "type": "internal_transfer_action",
            "action": {
                "from": "CFX:TYPE.NULL:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA0SFBNJM2",
                "fromPocket": "gas_payment",
                "fromSpace": "none",
                "to": "CFX:TYPE.USER:AAR5P39N0JGA6GN2JB4Z93E46SU6BG7ARP8152HUR2",
                "toPocket": "balance",
                "toSpace": "native",
                "value": "0x704fca5fc000"
            },
            "valid": true,
            "epochHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "epochNumber": "0x83f0b14",
            "blockHash": "0x20b2241f1c4ad1f64a1fbb677ebbf5a4f1e334120a8ee5e7e1c1d5cf96e286a7",
            "transactionPosition": "0x1",
            "transactionHash": "0xb817af2240cccc0311419651bd7b563775c6701842a0ea42043a20ad02a1128e"
        }
    ],
    "id": "15922956697249514502"
}

trace_epoch

Get whole epoch transaction's trace by it's number

Parameters

QUANTITY|TAG - the epoch number, or the string "latest_mined", "latest_state", "latest_confirmed", "latest_checkpoint" or "earliest", see the epoch number parameter.

Returns

Field	Type	Description
cfxTraces	Array of LocalizedTrace
ethTraces	Array of eSpaceTraceObject
mirrorAddressMap	Map(Address,Base32)	hex address to base32 address

eSpaceTraceObject

Field	Type	Optional	Description
action	Call or Create or SelfDestruct
result	CallResult or CreateResult Or None
error	String	✅
traceAddress	Array of Number		explanation
subtraces	Number		Count of subtraces
transactionPosition	Number
transactionHash	Hash
blockNumber	Number
blockHash	Hash
valid	Boolean

trace_filter

Returns all traces matching the provided filter.

Parameters

Object - A trace filter object

Field	Type	Optional	Description
fromEpoch	QUANTITY or TAG	✅	the epoch number, or the string `"latest_state"`, `"latest_confirmed"`, `"latest_checkpoint"` or `"earliest"`, see the epoch number parameter Search will be applied from this epoch number.
toEpoch	QUANTITY or TAG	✅	the epoch number, or the string `"latest_state"`, `"latest_confirmed"`, `"latest_checkpoint"` or `"earliest"`, see the epoch number parameter. Search will be applied up until (and including) this epoch number.
fromAddress	Base32	✅
toAddress	Base32	✅
blockHashes	Array of Hash	✅	default: `null` Array of up to 128 block hashes that the search will be applied to. This will override from/to epoch fields if it's not `null`.
actionTypes	Array of ActionType Enum	✅	If None, match all. If specified, trace must match one of these action types.
after	QUANTITY	✅	The offset trace number.
count	QUANTITY	✅	The number of traces to display in a batch.

Returns

Same as trace_transaction

Note

Only traces which's callType value is call and have success result status, that can indicate CFX transfer.

V2.0 trace breaking change

From Conflux-rust v2.0 the trace RPC have imported some breaking change, below is a quick introduction of the updates, there also is detail document here

Note: To use the new trace data, the fullnode data should be cleaned and resynchronization.

New added field `valid`

A new field valid is added to trace to indicate whether the corresponding trace is reverted.

Note: If the old trace data is not cleaned and resynchronization, the valid filed will always be true.

Gas consume and refund trace was introduced

Any transaction bumping nonce during execution will generate one or two traces with type "internal_transfer_action" to indicate gas payment and gas refund.

Consider a transaction has gas limit 40000 and gas price 3 Drip.

{
    "action": {
        "from": <contract_address>,
        "fromPocket": "sponsor_balance_for_gas",
        "to": <zero_address>,
        "toPocket": "gas_payment",
        "value": 120000, 
    }
    "type": "internal_transfer_action"
    ......
}

If the transaction is not sponsored, the trace will be

{
    "action": {
        "from": <sender_address>,
        "fromPocket": "balance",
        "to": <zero_address>,
        "toPocket": "gas_payment",
        "value": 120000, 
    }
    "type": "internal_transfer_action"
    ......
}

This should be the first trace of most transactions.

After execution, if this transaction costs 25000 gas, up to 1/4 of gas limit, i.e., 10000 gas (30000 Drip when gas price = 3) will be refunded, then it will generate a trace

{
    "action": {
        "from": <zero_address>,
        "fromPocket": "gas_payment",
        "to": ...,
        "toPocket": ...,
        "value": 30000, 
    },
    "type": "internal_transfer_action",
    ...
}

Trace for storage collateral.

Consider a transaction collateralize 10 Drip (it can not happen in a real Conflux system, just for example).

If the transaction is sponsored,

{
    "action": {
        "from": <contract_address>,
        "fromPocket": "sponsor_balance_for_collateral",
        "to": <contract_address>,
        "toPocket": "storage_collateral",
        "value": 10, 
    },
    "type": "internal_transfer_action",
    ...
}

If the transaction is not sponsored,

{
    "action": {
        "from": <sender_address>,
        "fromPocket": "balance",
        "to": <sender_address>,
        "toPocket": "storage_collateral",
        "value": 10, 
    },
    "type": "internal_transfer_action",
    ...
}

When releasing storage, the value will be returned to the same route.

Indicator for kill contract

Each time a contract is killed, it will produce such a trace,

{
    "action": {
        "from": <contract_address>,
        "fromPocket": "balance",
        "to": <zero_address>, 
        "toPocket": "mint_or_burn",
        "value": ...,
        ...
    },
    "type": "internal_transfer_action",
    ...
}

New added `space` field

The call and create type action will add a new field space to indicate which space the trace occurred in, the possible values are:

native
ethereum
none

Four new field added to `internal_transfer_action`

fromPocket
toPocket
fromSpace
toSpace

Specification for pocket

In Conflux, each account could have several pockets to store CFX.

balance
staking_balance
storage_collateral
sponsor_balance_for_gas
sponsor_balance_for_collateral

The fromPocket field and toPocket field could be one of them.

Besides these five values, the "pocket" could be two special values mint_or_burn and gas_payment.

fromPocket = mint_or_burn: mint CFX, e.g., generate staking interest
toPocket = mint_or_burn: burn CFX, e.g., when a contract is killed, its staking balance will be burnt.
fromPocket = gas_payment: gas payment, usually equals to gas_price * gas_limit
toPocket = gas_payment: gas refund after transaction execution.

Specification for space

native
evm
none

Changes in integrity constraints

Before change

The balance increasing (or decreasing) of an address (except the internal contract) during transaction execution corresponds to a trace whose "to" (or "from") is this address.

After change

The balance increasing (or decreasing) of an address (all the address) during transaction execution corresponds to a trace whose "to" (or "from") is this address and "toPocket" (or "fromPocket") is "balance". (Note: for trace type except "interal_transfer_action", the "fromPocket" and "toPocket" equal to "balance" implicitly.)
The staking balance/collateral balance/sponsor balance for gas/sponsor balance for collateral increasing (or decreasing) of an address during transaction execution corresponds to an internal_transfer type trace whose "to" (or "from") is this address and "toPocket" (or "fromPocket") is "sponsor_balance"/"storage_collateral"/"sponsor_balance_for_gas"/"sponsor_balance_for_collateral".

Action object​

call​

call_result​

create​

create_result​

internal_transfer_action​

set_auth​

suicide​

Trace object​

trace RPCs​

trace_block​

Parameters​

Returns​

TransactionTrace object​

BlockTrace object​

trace_transaction​

Parameters​

Returns​

LocalizedTrace Object​

trace_epoch​

Parameters​

Returns​

trace_filter​

Parameters​

Returns​

Note​

V2.0 trace breaking change​

New added field valid​

Gas consume and refund trace was introduced​

Trace for storage collateral.​

Indicator for kill contract​

New added space field​

Four new field added to internal_transfer_action​

Specification for pocket​

Specification for space​

Changes in integrity constraints​

Before change​

After change​

Action object

call

call_result

create

create_result

internal_transfer_action

set_auth

suicide

Trace object

trace RPCs

trace_block

Parameters

Returns

TransactionTrace object

BlockTrace object

trace_transaction

Parameters

Returns

LocalizedTrace Object

trace_epoch

Parameters

Returns

trace_filter

Parameters

Returns

Note

V2.0 trace breaking change

New added field `valid`

Gas consume and refund trace was introduced

Trace for storage collateral.

Indicator for kill contract

New added `space` field

Four new field added to `internal_transfer_action`

Specification for pocket

Specification for space

Changes in integrity constraints

Before change

After change