txutils.sh

#!/bin/bash

# Some helper functions for working with cosmos-sdk txs from the command line or
# in bash scripts.
#
# Example: say, if you want to send coins to multiple recipients. We need to:
#
# - compose a tx containing multiple "send" messages
# - set an appropriate gas limit and fee amount
# - sign it
# - broadcast it
# - wait until the tx is confirmed onchain.
#
# To do these, use the following commands:
#
# ```bash
# source txutils.sh
# resetTx
# appendMsg $(osmosisd tx bank send [account] cosmos1... 12345uosmo --from [account] --generate-only)
# appendMsg $(osmosisd tx bank send [account] cosmos1... 23456uosmo --from [account] --generate-only)
# setGas 1000000 0.0025uosmo
# signAndBroadcast osmosisd osmosis-1 [account] [password]
# ```

resetTx() {
  if [ -f "./tx.json" ]; then
    rm ./tx.json
  fi
}

appendMsg() {
  tx=$1
  msgs=$(echo $tx | jq ".body.messages")

  if [ -f "./tx.json" ]; then
    jq ".body.messages += $msgs" tx.json | sponge tx.json
  else
    echo "$tx" > tx.json
  fi
}

setGas() {
  gas=$1
  gasPrice=$2 # price without the denom
  gasDenom=$3

  jq ".auth_info.fee.gas_limit = \"$gas\"" tx.json | sponge tx.json

  amountDec=$(echo "$gas * $gasPrice" | bc)
  amount=${amountDec%.*}
  if (( $amount > 0 )); then
    jq ".auth_info.fee.amount = [{\"denom\":\"$gasDenom\",\"amount\":\"$amount\"}]" tx.json | sponge tx.json
  else
    jq '.auth_info.fee.amount = []' tx.json | sponge tx.json
  fi
}

signAndBroadcast() {
  bin=$1
  chainId=$2
  accName=$3
  pass=$4

  echo "🤖 Signing tx..."
  echo $pass | $bin tx sign tx.json --chain-id $chainId --from $accName --output-document tx.json -y

  echo "🤖 Broadcasting tx..."
  txhash=$($bin tx broadcast tx.json --output json | jq -r '.txhash')
  echo "txhash: $txhash"

  echo "🤖 Tx broadcasted, waiting for confirmation..."
  while true; do
    txRes=$($bin q tx $txhash --output json 2> /dev/null) && returncode=0 || returncode=$?
    if [[ $returncode -ne 0 ]]; then
      echo "⏳ Tx not confirmed on chain yet, waiting..."
      sleep 1
      continue
    fi

    code=$(echo $txRes | jq -r '.code')
    if [[ $code -ne 0 ]]; then
      errMsg=$(echo $txRes | jq -r '.raw_log')
      echo "❌ Tx failed: $errMsg"
      exit 1
    fi

    echo "✅ Tx success!"
    break
  done
}