2.0.0-beta.3

• Open will now fall back to loading the database in memory if the file-system does not support mmap. Pull request by database64128. GitHub #163.
• Made significant improvements to the Windows memory-map handling. . GitHub #162.
• Fix an integer overflow on large databases when using a 32-bit architecture. See ipinfo/mmdbctl#33.

2.0.0-beta.2

• Allow negative indexes for arrays when using DecodePath. #152
• Add IncludeNetworksWithoutData option for Networks and NetworksWithin. #155 and #156

2.0.0-beta.1

This is the first beta of the v2 releases. Go 1.23 is required. I don't expect to do a final release until Go 1.24 is available. See #141 for the v2 roadmap.

Notable changes:

• (*Reader).Lookup now takes only the IP address and returns a Result. Lookup(ip, &rec) would now become Lookup(ip).Decode(&rec).
• (*Reader).LookupNetwork has been removed. To get the network for a result, use (Result).Prefix().
• (*Reader).LookupOffset now takes an offset and returns a Result. Result has an Offset() method that returns the offset value. (*Reader).Decode has been removed.
• Use of net.IP and *net.IPNet have been replaced with netip.Addr and netip.Prefix.
• You may now decode a particular path within a database record using (Result).DecodePath. For instance, to decode just the country code in GeoLite2 Country to a string called code, you might do something like Lookup(ip).DecodePath(&code, "country", "iso_code"). Strings should be used for map keys and ints for array indexes.
• (*Reader).Networks and (*Reader).NetworksWithin now return a Go 1.23 iterator of Result values. Aliased networks are now skipped by default. If you wish to include them, use the IncludeAliasedNetworks option.

1.13.1

• Return the *net.IPNet in canonical form when using NetworksWithin to look up a network more specific than the one in the database. Previously, the IP field on the *net.IPNet would be set to the IP from the lookup network rather than the first IP of the network.
• NetworksWithin will now correctly handle an *net.IPNet parameter that is not in canonical form. This issue would only occur if the *net.IPNet was manually constructed, as net.ParseCIDR returns the value in canonical form even if the input string is not.

1.13.0

• Go 1.21 or greater is now required.
• The error messages when decoding have been improved. #119

1.12.0

• The wasi target is now built without memory-mapping support. Pull request
  by Alex Kashintsev. GitHub #114.
• When decoding to a map of non-scalar, non-interface types such as a
  map[string]map[string]any, the decoder failed to zero out the value for
  the map elements, which could result in incorrect decoding. Reported by
  JT Olio. GitHub #115.

1.11.0

• wasm and wasip1 targets are now built without memory-mapping support.
  Pull request by Randy Reddig. GitHub #110.

Full Changelog: v1.10.0...v1.11.0

1.10.0

• Set Go version in go.mod file to 1.18.

1.9.0

• Set the minimum Go version in the go.mod file to 1.17.
• Updated dependencies.
• Minor performance improvements to the custom deserializer feature
  added in 1.8.0.

1.8.0

• Added maxminddb.SkipAliasedNetworks option to Networks and
  NetworksWithin methods. When set, this option will cause the
  iterator to skip networks that are aliases of the IPv4 tree.
• Added experimental custom deserializer support. This allows
  much more control over the deserialization. The API is
  subject to change and you should use at your own risk.