shell script to examine and deprecate a Wyvern user proxy via `cast`

deprecate_wyvern_user_proxy.sh

##### SUMMARY #####
#
# to brick a user proxy, you can upgrade to this contract then call the proxy:
# https://etherscan.io/address/0x00000000008fe2c0c1795fe9a8e2c1d3f913b35d#code
#
# Step 1: find the proxy for the account
# proxy registry: 0xa5409ec958C83C3f309868babACA7c86DCB077c1
# call: proxies(address) where address = user's account
#
# Step 2: upgrade the proxy and call it to renounce ownership
# upgradeToAndCall(address implementation, bytes data)
# 0x4f1ef28600000000000000000000000000000000008fe2c0c1795fe9a8e2c1d3f913b35d00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000000
#
# example tx: https://etherscan.io/tx/0x86a5d29d7088476c4bac3385589b8c352ad22167782aed9b0f3552c88d975ff8
#
##### USAGE #####
#
# cast must be installed to use the script below:
# $ curl -L https://foundry.paradigm.xyz | bash
#
# example usage (leave the derivation path off to provide a private key):
# $ deprecate_wyvern_user_proxy 0x0734d56DA60852A03e2Aafae8a36FFd8c12B32f1 https://eth.llamarpc.com "m/44'/60'/0'/2"

function deprecate_wyvern_user_proxy () {
    ADDRESS=$1
    RPC=$2
    DERIVATION_PATH=$3

    REGISTRY=0xa5409ec958C83C3f309868babACA7c86DCB077c1
    NULL_ADDRESS=0x0000000000000000000000000000000000000000

    PROXY=$(cast parse-bytes32-address $(cast call -r $RPC $REGISTRY "proxies(address)" $ADDRESS))

    if [ "$PROXY" = "$NULL_ADDRESS" ]
    then
        echo "No proxy found for $ADDRESS";
        return 1
    fi

    echo "Proxy: "$PROXY"";

    ORIGINAL=0xF9e266af4BcA5890e2781812cc6a6E89495a79f2
    DEPRECATED=0x00000000008FE2c0C1795Fe9A8e2C1D3F913b35d

    IMPLEMENTATION=$(cast parse-bytes32-address $(cast call -r $RPC $PROXY "implementation()"))
    if [ "$IMPLEMENTATION" = "$ORIGINAL" ]
    then
        echo "Implementation: "$IMPLEMENTATION" (original)";
    elif [ "$IMPLEMENTATION" = "$DEPRECATED" ]
    then
        echo "Implementation: "$IMPLEMENTATION" (deprecated)";
    else
        echo "Implementation: "$IMPLEMENTATION" (unknown)";
    fi

    OWNER=$(cast parse-bytes32-address $(cast call -r $RPC $PROXY "proxyOwner()"))
    if [ "$OWNER" = "$ADDRESS" ]
    then
        echo "Owner: "$OWNER" (owned)";
    elif [ "$OWNER" = "$NULL_ADDRESS" ]
    then
        echo "Owner: "$OWNER" (burned)";
        return 0
    else
        echo "Owner: "$OWNER" (OWNED BY ANOTHER ACCOUNT)";
        return 1
    fi

    echo "Preparing transaction to deprecate proxy..."

    if [[ -z "$DERIVATION_PATH" ]]; then
        cast send -i --from $ADDRESS -r $RPC $PROXY 0x4f1ef28600000000000000000000000000000000008fe2c0c1795fe9a8e2c1d3f913b35d00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000000
    else
        cast send --ledger --from $ADDRESS --mnemonic-derivation-path $DERIVATION_PATH -r $RPC $PROXY 0x4f1ef28600000000000000000000000000000000008fe2c0c1795fe9a8e2c1d3f913b35d00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000000
    fi

	if [[ $? -eq 0 ]]; then
	    echo "Done."
	else
	    echo "Error."
	fi

    return 0
}