flywithu/Learning-Bitcoin-from-the-Command-Line
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fix for jq auto formatting decimals

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jq auto formats decimals to scientific notation so the calculation on the last line of the script fails on a syntax error:

For example:
```
$ echo "0.0001 - 9.5e-05" | /usr/bin/bc
(standard_in) 1: syntax error
```
vs this:
```
$ echo "0.0001 - 0.000095" | /usr/bin/bc
.000005
```
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psqnt 2020-11-01 08:43:04 -05:00 committed by GitHub
parent 2323ed4e1a
commit eadefbcf0c
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src/04_2_i_txfee-calc.sh
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@ -10,4 +10,5 @@ usedtxid=($(bitcoin-cli decoderawtransaction $1 | jq -r '.vin | .[] | .txid'))
usedvout=($(bitcoin-cli decoderawtransaction $1 | jq -r '.vin | .[] | .vout'))
btcin=$(for ((i=0; i<${#usedtxid[*]}; i++)); do txid=${usedtxid[i]}; vout=${usedvout[i]}; bitcoin-cli listunspent | jq -r '.[] | select (.txid | contains("'${txid}'")) | select(.vout | contains('$vout')) | .amount'; done | awk '{s+=$1} END {print s}')
btcout=$(bitcoin-cli decoderawtransaction $1 | jq -r '.vout [] | .value' | awk '{s+=$1} END {print s}')
btcout_f=$(awk -v btcout="$btcout" 'BEGIN { printf("%f\n", btcout) }' </dev/null)
echo "$btcin-$btcout"| /usr/bin/bc