fix: operator id fetching on scripts

bin/hkdf

@@ -13,5 +13,5 @@ if (process.argv.length !== 4) {
   process.exit(3)
 }
 
-const masterSeed = new Buffer(masterSeedHex, 'hex')
+const masterSeed = Buffer.from(masterSeedHex, 'hex')
 console.log(hkdf(masterSeed, 32, { salt: 'lamassu-server-salt', info: label }).toString('hex'))

bin/lamassu-coinatmradar

@@ -1,7 +1,5 @@
 #!/usr/bin/env bash
 
-SEED="$(cat ~/seeds/seed.txt)"
-
 echo
 echo "Here is the 'External ID' of your paired machine(s), for use under the 'ATM / Teller details' of your CoinATMRadar listing:"
 echo
@@ -9,5 +7,5 @@ su - postgres -c "psql \"lamassu\" -Atc \"select regexp_replace(device_id, '$',
 echo
 echo "If speaking with CoinATMRadar directly, it may be helpful to let them know your 'Operator ID':"
 echo
-$(npm root -g)/lamassu-server/bin/hkdf operator-id "$SEED" | cut -c -32
+$(npm root -g)/lamassu-server/bin/lamassu-operator
 echo

bin/lamassu-operator

@@ -1,9 +1,12 @@
-#!/usr/bin/env bash
+#!/usr/bin/env node
 
-SEED="$(cat ~/seeds/seed.txt)"
+const fs = require('fs')
+const hkdf = require('futoin-hkdf')
 
-echo
-echo "Your Operator ID for use with CoinATMRadar is:" 
-echo
-/usr/bin/hkdf operator-id "$SEED" | cut -c -32
-echo
+const options = require('../lib/options')
+const mnemonicHelpers = require('../lib/mnemonic-helpers')
+
+const mnemonic = fs.readFileSync(options.mnemonicPath, 'utf8').trim()
+const masterSeed = mnemonicHelpers.toEntropyBuffer(mnemonic)
+
+console.log(hkdf(masterSeed, 16, { salt: 'lamassu-server-salt', info: 'operator-id' }).toString('hex'))