[Bitcoin Calculate Fee] How can i calculate fee on Android or iOS.

[weixuefeng]

i make brc20 transfer transaction. but how can i calculate transaction fee? or how can i calculate transaction size?

such as this transaction:

wallet-core/android/app/src/androidTest/java/com/trustwallet/core/app/blockchains/bitcoin/TestBitcoinSigning.kt

Line 164 in bad5dab

fun testSignBrc20Transfer() {

[weixuefeng]

@satoshiotomakan

[Milerius]

You need to use online rpc to calculate the fees @weixuefeng - fees calculation is not included in wallet core for any chains

[weixuefeng]

@Milerius if my transaction is a normal transaction, just like from A to B, not brc20 transaction, i can use feeRate and transaction plan calculate bitcoin transaction fee, but what should i do when transaction is brc20, i found related method about FeeCalculator, maybe do you know how can i calculate transaction visual size?

[weixuefeng]

• https://jlopp.github.io/bitcoin-transaction-size-calculator/
• https://bitcoinops.org/en/tools/calc-size/