- Download the script to your node with
wget https://gist.githubusercontent.com/TrezorHannes/9caa88cb8d287cc6ab6a9cb5fb892195/raw/b77d2688b809bf5ac4e00a9b7d080dc6b7b2653f/CPFP-Fee-Calculator.sh - Execute it with
bash CPFP-Fee-Calculator.sh - Add the details of your parent tx weight from mempool explorers like Mempool
Last active
November 6, 2023 07:34
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Save TrezorHannes/9caa88cb8d287cc6ab6a9cb5fb892195 to your computer and use it in GitHub Desktop.
Quick Child Pays for Parent (CPFP) calculator in Bash to ensure you use the right fee to bump an unconfirmed transaction
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| #!/bin/bash | |
| echo "This estimates how many sats/vbyte you need to bump your child tx to get your desired parent fee" | |
| #x= targetChildFee | |
| #x = (sat/vB_effective * (vB_parent + vB_child) - current_parent_fee) / vB_child | |
| read -p "Enter the total amount of sats your current(parent) tx cost? " currentFee | |
| read -p "What fee do you want your tx to be in sats/vbyte? " effectiveFee | |
| read -p "Enter Virtual size of Parent? " vBParent | |
| read -p "Enter Virtual size of child? " vBChild | |
| x=$(echo "scale=2; (($effectiveFee * ($vBParent + $vBChild)) - $currentFee) / $vBChild" | bc) | |
| echo -e "Your Child tx needs to be \033[32m$x\033[0m sats/vByte for your parent tx to be \033[32m$effectiveFee\033[0m sats/vByte" |
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