/wallet/unfreezebalancev2

Initiate an unfreeze request (Stake 2.0). Enters a 14-day waiting period; after maturity, withdraw via /wallet/withdrawexpireunfreeze.

• Source: framework/src/main/java/org/tron/core/services/http/UnFreezeBalanceV2Servlet.java
• Method: POST
• Contract: protocol.UnfreezeBalanceV2Contract

Request parameters

Field	Type	Required	Description
owner_address	string	Yes	Unfreezing account address
unfreeze_balance	int64	Yes	Unfreeze amount (sun)
resource	enum	No	BANDWIDTH / ENERGY / TRON_POWER
permission_id	int32	No	Multi-sig permission ID
visible	bool	No	Address format

Example:

curl --request POST \
     --url https://nile.trongrid.io/wallet/unfreezebalancev2 \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '
{
  "owner_address":    "41dd791d6b49e190062d650e6a23c575510d35f2f9",
  "unfreeze_balance": 1000000000,
  "resource":         "ENERGY"
}
'

Response

Before construction, the validator checks that owner has enough frozen balance under the given resource. The example account has no V2 ENERGY freeze; the actual Nile response is:

{"Error": "class org.tron.core.exception.ContractValidateException : no frozenBalance(Energy)"}

When validation passes, returns an unsigned protocol.Transaction. Structure outline (txID / ref_block_* / expiration / timestamp / raw_data_hex semantics are the same as /wallet/createtransaction):

{
  "visible": false,
  "txID": "<computed from raw_data>",
  "raw_data": {
    "contract": [
      {
        "parameter": {
          "value": {
            "owner_address":    "41dd791d6b49e190062d650e6a23c575510d35f2f9",
            "unfreeze_balance": 1000000000,
            "resource":         "ENERGY"
          },
          "type_url": "type.googleapis.com/protocol.UnfreezeBalanceV2Contract"
        },
        "type": "UnfreezeBalanceV2Contract"
      }
    ],
    "ref_block_bytes": "<latest solidified block at construction time>",
    "ref_block_hash":  "<latest solidified block at construction time>",
    "expiration":      "<timestamp + 60_000>",
    "timestamp":       "<construction moment>"
  },
  "raw_data_hex": "<protobuf encoding of raw_data>"
}

Error responses

Trigger	Response
Request body exceeds node.maxMessageSize	{"Error": "class java.lang.Exception : body size is too big, the limit is <N>"}
Request body is not valid JSON / field type mismatch	{"Error": "class com.alibaba.fastjson.JSONException : <parser info>"} or {"Error": "class org.tron.core.services.http.JsonFormat$ParseException : <decoder info>"}
Proposal #70 UNFREEZE_DELAY_DAYS not activated	{"Error": "class org.tron.core.exception.ContractValidateException : Not support UnfreezeV2 transaction, need to be opened by the committee"}
Invalid owner_address	{"Error": "... : Invalid address"}
owner account does not exist	{"Error": "... : Account[<address>] does not exist"}
resource = BANDWIDTH but no corresponding freeze	{"Error": "... : no frozenBalance(BANDWIDTH)"}
resource = ENERGY but no corresponding freeze	{"Error": "... : no frozenBalance(Energy)"}
resource = TRON_POWER (with new resource model) but no corresponding freeze	{"Error": "... : no frozenBalance(TronPower)"}
resource = TRON_POWER but new resource model not enabled	{"Error": "... : ResourceCode error.valid ResourceCode[BANDWIDTH、Energy]"}
Other invalid resource (with new resource model enabled)	{"Error": "... : ResourceCode error.valid ResourceCode[BANDWIDTH、Energy、TRON_POWER]"}
Other invalid resource (without new resource model)	{"Error": "... : ResourceCode error.valid ResourceCode[BANDWIDTH、Energy]"}
Invalid unfreeze_balance (≤0, exceeds available, outstanding delegations not yet recalled, etc.)	{"Error": "... : Invalid unfreeze_balance, [<n>] is error"}
Concurrent unfreeze count exceeds UNFREEZE_MAX_TIMES	{"Error": "... : Invalid unfreeze operation, unfreezing times is over limit"}
Other exceptions	{"Error": "<exceptionClass> : <message>"}

---