Transfer BNB

[grindydev]

I tried to transfer BNB by javascript-sdk

This is my code:

    const rawTx = {
        msg: [{
            type: "cosmos-sdk/Send",
            value: {
                inputs: [{
                    address: fromAddress,
                    coins: [{ denom: "BNB", amount }]
                }],
                outputs: [{
                    address: toAddress,
                    coins: [{ denom: "BNB", amount }]
                }]
            }
        }],
        signatures,
        memo,
        source: 0,
        chainId: "test-chain-WQW3zR",
        aminoPrefix: types.AminoPrefix.StdTx
    }

    var tx = new Transaction(rawTx);

    tx.sign(privateKey);
    const raw = '0x' + tx.serialize();

API: bnbcli: http://localhost:8080

Got err: "log": "{"codespace":1,"code":2,"abci_code":65538,"message":"tx parse error"}",