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update-price.sh
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#!/bin/sh
# Variables
tmpDir="/tmp/cardano-swaps/"
# Make the tmpDir if it doesn't already exist.
mkdir -p $tmpDir
ownerPubKeyFile="$HOME/wallets/01Stake.vkey"
beaconScriptFile="${tmpDir}twoWayBeacons.plutus"
beaconAddrFile="${tmpDir}twoWayBeaconStake.addr"
swapAddrFile="${tmpDir}twoWaySwap.addr"
swapDatumFile="${tmpDir}swapDatum.json"
swapRedeemerFile="${tmpDir}twoWaySpendingRedeemer.json"
beaconRedeemerFile="${tmpDir}twoWayBeaconRedeemer.json"
# The reference scripts are permanently locked in the swap address without a staking credential!
# You can use the `cardano-swaps query personal-address` command to see them.
beaconScriptPreprodTestnetRef="115c9ebb9928b8ec6e0c9d1420c43421cfb323639dd9fdcf1e7155e73bec13c5#1"
beaconScriptSize=4707
spendingScriptPreprodTestnetRef="115c9ebb9928b8ec6e0c9d1420c43421cfb323639dd9fdcf1e7155e73bec13c5#0"
spendingScriptSize=5343
# Generate the hash for the staking verification key.
echo "Calculating the staking pubkey hash for the borrower..."
ownerPubKeyHash=$(cardano-cli conway stake-address key-hash \
--stake-verification-key-file $ownerPubKeyFile)
# Export the beacon script.
echo "Exporting the beacon script..."
cardano-swaps scripts two-way beacon-script \
--out-file $beaconScriptFile
# Create the beacon stake address.
echo "Creating the beacon reward address..."
cardano-cli conway stake-address build \
--stake-script-file $beaconScriptFile \
--testnet-magic 1 \
--out-file $beaconAddrFile
# Create the spending redeemer.
echo "Creating the spending redeemer..."
cardano-swaps spending-redeemers two-way \
--update-with-stake \
--out-file $swapRedeemerFile
# Create the beacon script redeemer.
echo "Creating the beacon redeemer..."
cardano-swaps beacon-redeemers two-way \
--update-only \
--out-file $beaconRedeemerFile
# Create the swap datum.
echo "Creating the swap datum..."
cardano-swaps datums two-way \
--first-asset lovelace \
--second-asset c0f8644a01a6bf5db02f4afe30d604975e63dd274f1098a1738e561d.4f74686572546f6b656e0a \
--first-price '1 / 1000000' \
--second-price 3000000 \
--out-file $swapDatumFile
# Helper beacon variables.
echo "Calculating the beacon names..."
beaconPolicyId=$(cardano-swaps beacon-info two-way policy-id \
--stdout)
pairBeaconName=$(cardano-swaps beacon-info two-way pair-beacon \
--first-asset lovelace \
--second-asset c0f8644a01a6bf5db02f4afe30d604975e63dd274f1098a1738e561d.4f74686572546f6b656e0a \
--stdout)
asset1BeaconName=$(cardano-swaps beacon-info two-way asset-beacon \
--first-asset lovelace \
--stdout)
asset2BeaconName=$(cardano-swaps beacon-info two-way asset-beacon \
--second-asset c0f8644a01a6bf5db02f4afe30d604975e63dd274f1098a1738e561d.4f74686572546f6b656e0a \
--stdout)
pairBeacon="${beaconPolicyId}.${pairBeaconName}"
asset1Beacon="${beaconPolicyId}.${asset1BeaconName}"
asset2Beacon="${beaconPolicyId}.${asset2BeaconName}"
# Create the transaction.
echo "Exporting the current protocol parameters..."
cardano-swaps query protocol-params \
--testnet \
--out-file "${tmpDir}protocol.json"
initial_change=$((8179466356))
echo "Building the initial transaction..."
cardano-cli conway transaction build-raw \
--tx-in e44ff771ac294fca630bb4752058cbbde85a97e640bfaf03050ad8bb0c70adf9#1 \
--tx-in e44ff771ac294fca630bb4752058cbbde85a97e640bfaf03050ad8bb0c70adf9#0 \
--spending-tx-in-reference $spendingScriptPreprodTestnetRef \
--spending-plutus-script-v2 \
--spending-reference-tx-in-inline-datum-present \
--spending-reference-tx-in-execution-units "(0,0)" \
--spending-reference-tx-in-redeemer-file $swapRedeemerFile \
--withdrawal "$(cat ${beaconAddrFile})+0" \
--withdrawal-tx-in-reference $beaconScriptPreprodTestnetRef \
--withdrawal-plutus-script-v2 \
--withdrawal-reference-tx-in-execution-units "(0,0)" \
--withdrawal-reference-tx-in-redeemer-file $beaconRedeemerFile \
--tx-out "$(cat ${swapAddrFile}) + 3000000 lovelace + 1 ${pairBeacon} + 1 ${asset1Beacon} + 1 ${asset2Beacon} + 20 c0f8644a01a6bf5db02f4afe30d604975e63dd274f1098a1738e561d.4f74686572546f6b656e0a" \
--tx-out-inline-datum-file $swapDatumFile \
--tx-out "$(cat $HOME/wallets/01.addr) + ${initial_change} lovelace" \
--tx-in-collateral 4cc5755712fee56feabad637acf741bc8c36dda5f3d6695ac6487a77c4a92d76#0 \
--tx-total-collateral 21000000 \
--tx-out-return-collateral "$(cat $HOME/wallets/01.addr) 21000000 lovelace" \
--required-signer-hash "$ownerPubKeyHash" \
--protocol-params-file "${tmpDir}protocol.json" \
--fee 5000000 \
--out-file "${tmpDir}tx.body"
echo "Getting the execution units estimations..."
exec_units=$(cardano-swaps evaluate-tx \
--testnet \
--tx-file "${tmpDir}tx.body")
# MAKE SURE THE INDEXES MATCH THE LEXICOGRAPHICAL ORDERING FOR INPUTS AND POLICY IDS.
# You can use `cardano-cli debug transaction view --tx-file "${tmpDir}tx.body` to view the prior
# transaction with everything in the correct order.
stake_mem=$(echo $exec_units | jq '.result | .[] | select(.validator.purpose=="withrdrawal" and .validator.index==0) | .budget.memory' )
stake_steps=$(echo $exec_units | jq '.result | .[] | select(.validator.purpose=="withrdrawal" and .validator.index==0) | .budget.cpu' )
spend_0_mem=$(echo $exec_units | jq '.result | .[] | select(.validator.purpose=="spend" and .validator.index==0) | .budget.memory' )
spend_0_steps=$(echo $exec_units | jq '.result | .[] | select(.validator.purpose=="spend" and .validator.index==0) | .budget.cpu' )
echo "Rebuilding the transaction with proper execution budgets..."
cardano-cli conway transaction build-raw \
--tx-in e44ff771ac294fca630bb4752058cbbde85a97e640bfaf03050ad8bb0c70adf9#1 \
--tx-in e44ff771ac294fca630bb4752058cbbde85a97e640bfaf03050ad8bb0c70adf9#0 \
--spending-tx-in-reference $spendingScriptPreprodTestnetRef \
--spending-plutus-script-v2 \
--spending-reference-tx-in-inline-datum-present \
--spending-reference-tx-in-execution-units "(${spend_0_steps},${spend_0_mem})" \
--spending-reference-tx-in-redeemer-file $swapRedeemerFile \
--withdrawal "$(cat ${beaconAddrFile})+0" \
--withdrawal-tx-in-reference $beaconScriptPreprodTestnetRef \
--withdrawal-plutus-script-v2 \
--withdrawal-reference-tx-in-execution-units "(${stake_steps},${stake_mem})" \
--withdrawal-reference-tx-in-redeemer-file $beaconRedeemerFile \
--tx-out "$(cat ${swapAddrFile}) + 3000000 lovelace + 1 ${pairBeacon} + 1 ${asset1Beacon} + 1 ${asset2Beacon} + 20 c0f8644a01a6bf5db02f4afe30d604975e63dd274f1098a1738e561d.4f74686572546f6b656e0a" \
--tx-out-inline-datum-file $swapDatumFile \
--tx-out "$(cat $HOME/wallets/01.addr) + ${initial_change} lovelace" \
--tx-in-collateral 4cc5755712fee56feabad637acf741bc8c36dda5f3d6695ac6487a77c4a92d76#0 \
--tx-total-collateral 21000000 \
--tx-out-return-collateral "$(cat $HOME/wallets/01.addr) 21000000 lovelace" \
--required-signer-hash "$ownerPubKeyHash" \
--protocol-params-file "${tmpDir}protocol.json" \
--fee 5000000 \
--out-file "${tmpDir}tx.body"
echo "Calculating the required fee..."
calculated_fee=$(cardano-cli conway transaction calculate-min-fee \
--tx-body-file "${tmpDir}tx.body" \
--protocol-params-file "${tmpDir}protocol.json" \
--reference-script-size $((beaconScriptSize+spendingScriptSize)) \
--witness-count 2 | cut -d' ' -f1)
req_fee=$((calculated_fee+50000)) # Add 0.05 ADA to be safe since the fee must still be updated.
req_collateral=$(printf %.0f $(echo "${req_fee}*1.5" | bc))
echo "Rebuilding the transaction with the required fee..."
cardano-cli conway transaction build-raw \
--tx-in e44ff771ac294fca630bb4752058cbbde85a97e640bfaf03050ad8bb0c70adf9#1 \
--tx-in e44ff771ac294fca630bb4752058cbbde85a97e640bfaf03050ad8bb0c70adf9#0 \
--spending-tx-in-reference $spendingScriptPreprodTestnetRef \
--spending-plutus-script-v2 \
--spending-reference-tx-in-inline-datum-present \
--spending-reference-tx-in-execution-units "(${spend_0_steps},${spend_0_mem})" \
--spending-reference-tx-in-redeemer-file $swapRedeemerFile \
--withdrawal "$(cat ${beaconAddrFile})+0" \
--withdrawal-tx-in-reference $beaconScriptPreprodTestnetRef \
--withdrawal-plutus-script-v2 \
--withdrawal-reference-tx-in-execution-units "(${stake_steps},${stake_mem})" \
--withdrawal-reference-tx-in-redeemer-file $beaconRedeemerFile \
--tx-out "$(cat ${swapAddrFile}) + 3000000 lovelace + 1 ${pairBeacon} + 1 ${asset1Beacon} + 1 ${asset2Beacon} + 20 c0f8644a01a6bf5db02f4afe30d604975e63dd274f1098a1738e561d.4f74686572546f6b656e0a" \
--tx-out-inline-datum-file $swapDatumFile \
--tx-out "$(cat $HOME/wallets/01.addr) + $((initial_change-req_fee)) lovelace " \
--tx-in-collateral 4cc5755712fee56feabad637acf741bc8c36dda5f3d6695ac6487a77c4a92d76#0 \
--tx-total-collateral $req_collateral \
--tx-out-return-collateral "$(cat $HOME/wallets/01.addr) $((21000000-$req_collateral)) lovelace" \
--required-signer-hash "$ownerPubKeyHash" \
--protocol-params-file "${tmpDir}protocol.json" \
--fee "$req_fee" \
--out-file "${tmpDir}tx.body"
echo "Signing the transaction..."
cardano-cli conway transaction sign \
--tx-body-file "${tmpDir}tx.body" \
--signing-key-file $HOME/wallets/01.skey \
--signing-key-file $HOME/wallets/01Stake.skey \
--testnet-magic 1 \
--out-file "${tmpDir}tx.signed"
echo "Submitting the transaction..."
cardano-swaps submit \
--testnet \
--tx-file "${tmpDir}tx.signed"
# Add a newline after the submission response.
echo ""