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Sometimes I want to interact with some smart contract ( maybe a decentralized exchange like uni swap)

And I want my transaction to be confirmed the fastest.

But usually, we are relying on other full nodes to help us broadcast the transactions.

For example on uniswap trading website https://app.uniswap.org/#/swap , it use https://mainnet.infura.io/v3/xxxxxxxxxxxxxxxxx as a provider.

But the service is not guaranteed and it could delay your request to broadcast the transactions.

So I am thinking whether building my own node will be better.

What node could broadcast transactions to miners? Is full node the only choice?

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