[Java/Kotlin] AnySigner.signJSON Always return empty string

[ImL1s]

This is my code.

   val wallet = HDWallet(TRON_SHASTA_MNEMONIC, "")
   val signedTransation = AnySigner.signJSON(
                    Gson().toJson(responseModel.tx),
                    wallet.getKeyForCoin(CoinType.TRON).data(),
                    CoinType.TRON.value()
                )

responseModel.tx is

    "tx": {
        "blockChain": {
            "name": "TRON",
            "defaultDecimals": 18,
            "addressPatterns": [
                "^T[1-9A-HJ-NP-Za-km-z]{33}$"
            ],
            "feeAssets": [
                {
                    "blockchain": "TRON",
                    "symbol": "TRX",
                    "address": null
                }
            ],
            "type": "TRON",
            "chainId": "728126428"
        },
        "raw_data": {
            "contract": [
                {
                    "parameter": {
                        "value": {
                            "data": "b24ebddb000000000000000000000000000000000000000000000000000000000001d2000000000000000000000000000000000000000000000000000000018f46cb4e1600000000000000000000000000000000000000000000000000000000000f4240",
                            "owner_address": "418df8d04d21ea9f24fc1d2f16ee4bcc13a68759b9",
                            "contract_address": "41a2726afbecbd8e936000ed684cef5e2f5cf43008",
                            "call_value": 1000000
                        },
                        "type_url": "type.googleapis.com/protocol.TriggerSmartContract"
                    },
                    "type": "TriggerSmartContract"
                }
            ],
            "ref_block_bytes": "13ad",
            "ref_block_hash": "94783775847b747d",
            "expiration": 1714879737000,
            "fee_limit": 1500000000,
            "timestamp": 1714879680068
        },
        "approve_raw_data": null,
        "raw_data_hex": "0a0213ad220894783775847b747d40a8d9b0b6f4315ad301081f12ce010a31747970652e676f6f676c65617069732e636f6d2f70726f746f636f6c2e54726967676572536d617274436f6e74726163741298010a15418df8d04d21ea9f24fc1d2f16ee4bcc13a68759b9121541a2726afbecbd8e936000ed684cef5e2f5cf4300818c0843d2264b24ebddb000000000000000000000000000000000000000000000000000000000001d2000000000000000000000000000000000000000000000000000000018f46cb4e1600000000000000000000000000000000000000000000000000000000000f424070c49cadb6f431900180dea0cb05",
        "approve_raw_data_hex": null,
        "__payload__": {
            "owner_address": "418df8d04d21ea9f24fc1d2f16ee4bcc13a68759b9",
            "call_value": 1000000,
            "contract_address": "41a2726afbecbd8e936000ed684cef5e2f5cf43008",
            "fee_limit": 1500000000,
            "function_selector": "trxToTokenSwapInput(uint256,uint256,uint256)",
            "parameter": "000000000000000000000000000000000000000000000000000000000001d2000000000000000000000000000000000000000000000000000000018f46cb4e1600000000000000000000000000000000000000000000000000000000000f4240",
            "chainType": 0
        },
        "approve_payload": null,
        "txID": "2a7323ca246aed88b56c7b06e22118aab958a00a53a87f01c94734024702e6f6",
        "approveTxID": null,
        "visible": false,
        "approveVisible": null,
        "type": "TRON"
    }

signedTransation always empty string, I have no idea.

responseModel.tx is rango API reutrn TX json.

[satoshiotomakan]

Hi @ImL1s, AnySigner.signJSON has a completely different format. It takes a Tron.Proto.SigningInput Protobuf represented as a JSON:
https://chromium.googlesource.com/external/github.com/google/protobuf/+/HEAD/src/google/protobuf/util/json_util.h#31

At this moment, WalletCore does not provide functionality to process the Rango TX format, so you need to manually convert the given JSON to a Tron.Proto.SigningInput:

wallet-core/src/proto/Tron.proto

Lines 254 to 264 in 406abe4

	// Input data necessary to create a signed transaction.
	message SigningInput {
	// Transaction.
	Transaction transaction = 1;
	// The secret private key used for signing (32 bytes).
	bytes private_key = 2;
	// For direct sign in Tron, we just have to sign the txId returned by the DApp json payload.
	string txId = 3;
	}