This tutorial will quickly guide you through everything an exchange needs to add NEM.
1. Account
To create an account go to https://nem.io/downloads/ and download the desktop client. We recommend creating a simple wallet. The delegated keys can be found at Services/Delegated Harvesting/Manage delegated account. The account’s private key can be found at Account.
2. API Documentation
NEM is completely API based and therefore language agnostic. To get started, take a look at the API documentation https://nemproject.github.io/.
Further, the NEM Knowledge Base consolidates lots of developer resources and examples: https://docs.nem.io.
3. Self-Hosted Node/Hugenode
Most exchanges like to run their own node for obvious reasons. I’d still like to point out that you can use the NEM library to execute API calls on a pool of supernodes. This is more reliable than running your own node since the call will be attempted until a working node has been found: https://nemlibrary.com/documentation/connection_pool/
3.1. Self-Hosted Node
If you want to run your own node, you can use the supernode guide and skip step 3: https://forum.nem.io/t/nem-supernode-command-line-tutorial-for-debian-8-4/2211
3.2. Self-Hosted Hugenode
If you require historical lookups (i.e. running /account/transfers/all with a hash that’s older than 36 hours), you’ll need to change a few settings for your node and you’ll need much more RAM.
RAM Requirements
Running a node with historical lookups requires at least 9GB of RAM for the NIS process. I recommend a 16GB VPS that assigns 10GB to the NIS. Check section 1.3. of the supernode guide and change the config file to:
#!/bin/bash
java -Xms10240M -Xmx10240M -cp ".:package/nis:package/nis/*:package/libs/*" org.nem.deploy.CommonStarter
Config Changes
Change the following in nis-ncc/package/nis/config.properties:
nis.optionalFeatures = TRANSACTION_HASH_LOOKUP|HISTORICAL_ACCOUNT_DATA
and
nis.transactionHashRetentionTime = -1