What is the minimum send amount?

Question

Hello, Multichain developers:)

I found a strange thing during the test about the minimum send amount.

native-currency-multiple is 100000000 and minimum-relay-fee is 1000000 in params.dat

I’ve sent 0.000000001(0.1satoshi) through the 'send' API and confirmed that it has sent.

------------result------------

test: getbalance

{"method":"getbalance","params":[],"id":1,"chain_name":"test"}

 

1085699999.75523877

test: send HCwtvswP6YsrqUJg7sEhfySbNsh1mqhtje 0.000000001

{"method":"send","params":["HCwtvswP6YsrqUJg7sEhfySbNsh1mqhtje",0.00000000],"id":1,"chain_name":"test"}

 

0118bd59cd4c79ab8697746306a25c1b5d26824daddd34535f54ebb27a067b33

test: getbalance

{"method":"getbalance","params":[],"id":1,"chain_name":"test"}

 

1085699999.74523878

--------------------------------------
0.01 is a minimum fee in my blockchain.

balance before: 1085699999.75523877

balance after: 1085699999.74523878

as you can see above, the balance difference is -0.00999999, which is lower than the minimum fee(0.01).

And I was also able to send -0.1 satoshi.

------------result------------

test: send HCwtvswP6YsrqUJg7sEhfySbNsh1mqhtje -1

{"method":"send","params":["HCwtvswP6YsrqUJg7sEhfySbNsh1mqhtje",-1],"id":1,"chain_name":"test"}

 

error code: -8

error message:

Invalid amount

test: send HCwtvswP6YsrqUJg7sEhfySbNsh1mqhtje -0.000000001

{"method":"send","params":["HCwtvswP6YsrqUJg7sEhfySbNsh1mqhtje",-0.00000000],"id":1,"chain_name":"test"}

 

9c2fd783b8e661da02ceef6b608e9cd228b4586a8b6920c0a6ac151e09115165

------------------------------

Please check those result above and provide feedback.

Thank you.

Answer 1

There are two things here. First, the minimum fee parameter is per kilobyte of transaction size, so the actual fee can certainly be less. Second, when you sent a negative amount, you really sent zero, due to rounding of the JSON-RPC request. You can see the actual request sent in this line:

{"method":"send","params":["HCwtvswP6YsrqUJg7sEhfySbNsh1mqhtje",-0.00000000],"id":1,"chain_name":"test"}

Comments

Hello, thanks for the feedback.

below is the transaction information of first transaction.
-------------------------------------------------------------
test: gettransaction 0118bd59cd4c79ab8697746306a25c1b5d26824daddd34535f54ebb27a067b33
{"method":"gettransaction","params":["0118bd59cd4c79ab8697746306a25c1b5d26824daddd34535f54ebb27a067b33"],"id":1,"chain_name":"test"}

{
    "amount" : 0.00000000,
    "fee" : -0.01000000,
    "confirmations" : 17,
    "blockhash" : "27e9b13e5f531eb6a84057c258ab6ca1235bf873a814cb59477fdc9423d1b419",
    "blockindex" : 1,
    "blocktime" : 1512637667,
    "txid" : "0118bd59cd4c79ab8697746306a25c1b5d26824daddd34535f54ebb27a067b33",
    "walletconflicts" : [
    ],
    "valid" : true,
    "time" : 1512637665,
    "timereceived" : 1512637665,
    "details" : [
        {
            "account" : "",
            "address" : "HCwtvswP6YsrqUJg7sEhfySbNsh1mqhtje",
            "category" : "send",
            "amount" : 0.00000000,
            "vout" : 0,
            "fee" : -0.01000000
        }
    ],
    "hex" : "0100000001db0c71511a298e5ef19f4de8ab308ef0c97106fe7714f4d4d75832716988a1b9000000006b483045022100a5678c1b7bb2ec38842ce8cb86ff87a6eb23b9d4c1acecfd0d520779ec2f259b02202aab9ef127f71800a6a7c38484715a24eb3a9491c95970d6871108e9c3ef29db012103510de2741850e60c8bd9bbdd75c811a986105c982c1dbf327abbd53eef3acbabffffffff0200000000000000001976a914467febc661b202cbf94d039e004146d87e8dd01b88acc05d634e180900001976a914838c333876da0eca93514131cf5b13e7d6623aa288ac00000000"
}
---------------------------------------------

As, you can see above, amount is 0, and fee is 0.01.

But the balance diffrence is 0.00999999.

Can you please let me know the reason for result above?

---

This just appears to be because of rounding, because your native-currency-multiple implies more decimal digits than is returned by the API.