<p>A transaction having a fee is not a consensus rule. Although the vast majority of nodes refuse to relay a 0 fee transaction, it is valid.</p>

<p>Such transactions can be included in a block by directly passing them to a miner, and would tend to belong to the miner themselves, or someone they have some kind of relation with.</p>

CC BY-SA 4.0
2020-02-25T16:04:31.230Z
2020-02-25T16:04:31.230Z
Raghav Sood
<p>I was debugging my little project and I've found this pair of txs without fees (they caused an alarm):</p>

<p>[txId=e8f6f08430ab6b1f3e645f499cf90c69acf2eb8a8d9766abb9d76314f29209dd, fees=0, weight=879600], [txId=cf7ba67c57d72dc735c200f5bf81789f6464adf65816b7640562d38a8c706a05, fees=0, weight=16052]}</p>

<p>both in block 618858.</p>

<p>first one is very heavy (almost a quarter of a block). </p>

<p>just curiosity. Do I have to suppose that it's probably the miner the one who has auto-sent this tx?</p>

<transaction-fees>
I've found two mined txs with no fee
dev7ba
# I've found two mined txs with no fee

(Asked by: username_0 on 2020-02-25)

I was debugging my little project and I've found this pair of txs without fees (they caused an alarm):

[txId=e8f6f08430ab6b1f3e645f499cf90c69acf2eb8a8d9766abb9d76314f29209dd, fees=0, weight=879600], [txId=cf7ba67c57d72dc735c200f5bf81789f6464adf65816b7640562d38a8c706a05, fees=0, weight=16052]}

both in block 618858.

first one is very heavy (almost a quarter of a block).

just curiosity. Do I have to suppose that it's probably the miner the one who has auto-sent this tx?

**Tags:** transaction-fees


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## 1 answers

### Answer by username_1 on 2020-02-25. Score: 8 | Accepted answer

A transaction having a fee is not a consensus rule. Although the vast majority of nodes refuse to relay a 0 fee transaction, it is valid.

Such transactions can be included in a block by directly passing them to a miner, and would tend to belong to the miner themselves, or someone they have some kind of relation with.


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