Nium
Nium Technical Briefing
Published September 20, 2022
Supported by Modern Treasury , IowaEDA and Brale
Overview
Nium is a B2B money-movement platform supporting 190 currencies and moving into crypto rails including Stellar, Polygon, Ethereum mainnet, the Lightning Network, and Bitcoin. The demo focuses on Nium\'s Stellar integration for stablecoin (USDC) payouts. Login uses Stellar\'s sign-a-secret flow (challenge → wallet signature → JWT) so there are no usernames or passwords. Nium creates a second participant on Stellar testnet, validates the destination routing number (the same validation used for fiat rails), and sends $0.20 USDC — recording the transaction on Nium\'s side, broadcasting to Stellar, and reflecting the debited balance in seconds. The product positioning: Nium is the pipes connecting fiat and digital-asset rails, giving people more control over what/when/how/where their money moves.
0:00 Introduction to Nium
Nium is a B2B money-movement platform supporting 190 currencies and increasingly moving into crypto. The demo focuses on Nium's integration with the Stellar network for stablecoin (USDC) payments.
0:30 Chains supported — Stellar, Polygon, Ethereum, Lightning, Bitcoin
Nium is integrated with Stellar, Polygon, Ethereum mainnet, the Lightning Network, and Bitcoin, among others. Today's demo runs on the Stellar testnet with 3.90 USDC in the sending wallet.
1:00 Stellar-native login — sign-a-secret for a JWT
Logging in uses Stellar's sign-a-secret flow: the server issues a challenge, the wallet signs it, and the user gets a JWT — no username or password. Nium exposes this as a simple API.
1:30 Create a participant on Stellar
Nium creates a second participant on the Stellar testnet, pushing the same data from the UI into the network and accepting the new wallet before any funds can be sent.
2:30 Routing-number validation
Even for crypto rails, Nium enforces the same validation used for fiat — the routing number is looked up and validated before the transaction is created on Nium's side.
3:00 Send $0.20 USDC — Nium creates, Stellar settles
Nium records the transaction on its side, pushes it to Stellar for settlement, and debits the sender for $0.20 USDC — leaving the sender with $3.70. The live wallet balance reflects the Stellar-settled transfer in seconds.
Presented by Geoff Greenberg — Nium · LinkedIn · website
Topics: Payments, Cross-Border
