address

#!/bin/bash

set -o errexit
set -o pipefail

SCRIPT_DIR=$(readlink -f $0 | xargs dirname)
. $SCRIPT_DIR/lib.sh

owner "$1" | openssl dgst -binary -sha256 | bin_to_base64_url

json-to-pem

#!/bin/bash

set -o errexit

SCRIPT_DIR=$(readlink -f $0 | xargs dirname)
. $SCRIPT_DIR/lib.sh

JSON=$1
OUT=$2

extract() {
    jq -r .$1 $JSON | base64_url_to_bin | xxd -p -c 1000000000
}

openssl asn1parse -genconf - -noout -out $2.der <<EOF
asn1=SEQUENCE:private_key

[private_key]
version=INTEGER:0
modulus=INTEGER:0x$(extract n)
publicExponent=INTEGER:0x$(extract e)
privateExponent=INTEGER:0x$(extract d)
prime1=INTEGER:0x$(extract p)
prime2=INTEGER:0x$(extract q)
exponent1=INTEGER:0x$(extract dp)
exponent2=INTEGER:0x$(extract dq)
coefficient=INTEGER:0x$(extract qi)
EOF

openssl rsa -in $2.der -inform DER -outform PEM -out $2
rm $2.der

lib.sh

#!/bin/sh

bin_to_base64_url() {
    openssl base64 -A | tr '+/' '-_' | tr -d '='
}

# https://raw.githubusercontent.com/Moodstocks/moodstocks-api-clients/master/bash/base64url.sh
decode() {
    _l=$((${#1} % 4))
    if [ $_l -eq 2 ]; then _s="$1"'=='
    elif [ $_l -eq 3 ]; then _s="$1"'='
    else _s="$1" ; fi
    echo "$_s" | tr '_-' '/+' | openssl enc -d -a -A
}

base64_url_to_bin() {
    decode $(tr -- '-_' '+/')
}

modulus() {
    openssl rsa -in $1 -modulus -noout | cut -f2 -d=
}

owner() {
    modulus "$1" | xxd -p -r
}

transfer

#!/bin/bash

set -o errexit
set -o pipefail

SCRIPT_DIR=$(readlink -f $0 | xargs dirname)
. $SCRIPT_DIR/lib.sh

KEY=$1
TARGET=$2
QUANTITY=$3
HOST=${HOST-arweave4.internal.nodes.upvest.co:1984}

WORKDIR=$(mktemp -d tx.XXXX)
SIGNING_DATA=$WORKDIR/signing_data
SIGNATURE=$WORKDIR/signature
REQUEST=$WORKDIR/request.json
trap "rm -r $WORKDIR" EXIT

calculate_reward() {
    curl --silent --fail $HOST/price/0/$TARGET
}

last_tx() {
    curl --silent --fail $HOST/wallet/$1/last_tx
}

sign() {
    openssl pkeyutl -sign \
        -inkey "$1" \
        -in <(openssl dgst -binary -sha256 < "$2") \
        -out "$3" \
        -pkeyopt digest:sha256 \
        -pkeyopt rsa_padding_mode:pss \
        -pkeyopt rsa_pss_saltlen:20
}

LAST_TX=$(last_tx $($SCRIPT_DIR/address "$KEY"))
OWNER=$(owner "$KEY" | bin_to_base64_url)
REWARD=$(calculate_reward)

owner "$KEY" > $SIGNING_DATA
echo "$TARGET" | base64_url_to_bin >> $SIGNING_DATA
echo -n "$QUANTITY" >> $SIGNING_DATA
echo -n "$REWARD" >> $SIGNING_DATA
echo $LAST_TX | base64_url_to_bin >> $SIGNING_DATA

sign "$KEY" $SIGNING_DATA $SIGNATURE

ID=$(openssl dgst -binary -sha256 $SIGNATURE | bin_to_base64_url)

cat > $REQUEST <<EOF
{
  "id": "$ID",
  "last_tx": "$LAST_TX",
  "data": "",
  "owner": "$OWNER",
  "target": "$TARGET",
  "quantity": "$QUANTITY",
  "reward": "$REWARD",
  "signature": "$(bin_to_base64_url < $SIGNATURE)"
}
EOF

tr -d ' \t\n\r\f' < $REQUEST | curl --silent -X POST -H "content-type: application/json" -d@- $HOST/tx > /dev/null

echo $ID