class Stellar::Util::StrKey
Constants
- VERSION_BYTES
Public Class Methods
check_decode(expected_version, str)
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# File lib/stellar/util/strkey.rb, line 22 def self.check_decode(expected_version, str) decoded = Base32.decode(str) rescue (raise ArgumentError, "Invalid base32 string") version_byte = decoded[0] payload = decoded[1...-2] check = decoded[-2..-1] version = VERSION_BYTES.key(version_byte) raise ArgumentError, "Unexpected version: #{version.inspect}" if version != expected_version raise ArgumentError, "Invalid checksum" if check != checksum(decoded[0...-2]) payload end
check_encode(version, byte_str)
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# File lib/stellar/util/strkey.rb, line 14 def self.check_encode(version, byte_str) version_byte = VERSION_BYTES[version] raise ArgumentError, "Invalid version: #{version}" if version_byte.blank? payload = version_byte + byte_str.dup.force_encoding("BINARY") check = checksum(payload) Base32.encode(payload + check) end
checksum(bytes)
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return the “XModem CRC16” (CCITT-like, but with 0-init and MSB first) packed into a string in little-endian order
# File lib/stellar/util/strkey.rb, line 36 def self.checksum(bytes) crc = Digest::CRC16XModem.checksum(bytes) [crc].pack("S<") end