Sending Transactions to Private Mempool (Priority Fee)

Learn how to add tips to transaction while sending to private mempool

Priority fees incentivize builders to include your transaction faster and position it more favorably within a block. Adding a tip to your private transaction provides three key benefits:

• Higher inclusion probability: Builders prioritize transactions with higher fees

• Better block positioning: Achieve positions 1–2 more reliably

• Faster confirmation: Reduce waiting time for transaction inclusion

Choosing a Method

They are Two approaches exist for adding priority fees to private transactions:

Method	Best For	Trade-offs
Multicall3	Most use cases	Single nonce, atomic execution, slightly higher gas
Bundle	Advanced scenarios requiring separate transactions	Two nonces, more complex setup

Different Between Bundles and Transactions

Choose the appropriate method based on your use case:

Method	bsc_privateTx	mev_sendBundle
Transaction count	Single	Multiple
Atomicity	Not applicable	All-or-nothing execution
Use cases	Simple transfers, individual swaps	Arbitrage, multi-step operations
Adding priority fees	Via Multicall3	Separate transaction in bundle
mev_builders format	Array: ["all"]	Object: {"all": ""}

Recommended Tip Amounts

Priority	Tip Amount	Use Case
Low	0.0001 BNB	Regular trades
Medium	0.0005 BNB	Time-sensitive
High	0.001 BNB	Arbitrage, liquidations
Very High	0.005+ BNB	Critical, competitive

Note: A higher tip means higher priority, but you only pay if TX is included.

Next Steps

Learn how to submit transactions via Multicall3 or Bundle method to the private mempool.