Immutable X (Ethereum Layer-2)

Immutable X — Ethereum Layer-2 with ZK Rollup

Immutable X is an Ethereum Layer-2 scaling solution specifically for NFTs and gaming items. It uses StarkEx ZK rollup technology (developed by StarkWare) to enable gas-free NFT transactions — mintings, trades, and transfers cost users no ETH gas fees.

Tech Architecture

StarkEx ZK rollup works as follows:

1. Thousands of transactions are batched off-chain
2. A zero-knowledge proof confirms their validity
3. The proof is submitted to Ethereum mainnet
4. User operations are thus Ethereum-secured but gas-free

Organization

Immutable Pty Ltd is the developer organization:

• Headquarters: Sydney, Australia
• Co-founders: James Ferguson, Robbie Ferguson, Alex Connolly
• Funding: $1B+ from Tencent, Animoca, BITKRAFT, Galaxy Digital, etc.
• Native token: IMX (ERC-20, also on Immutable X)

Crypto Stamp Significance

Immutable X is the blockchain under VeVe — and thus the blockchain under all USPS crypto stamp editions:

• USPS Day of the Dead (02.11.2021)
• USPS Christmas Series (multi-year)
• USPS Lunar New Year Series
• USPS Stamp Art Series
• USPS Presidential Issue 1938 reference

Smart Contract Address for all USPS editions: 0xa7aefead2f25972d80516628417ac46b3f2604af (publicly verifiable on immutascan.io).

Comparison with Polygon

Polygon is the more common crypto stamp blockchain (DE/IT/AT family). Comparison:

Both are Ethereum Layer-2, but technically different. Immutable X is more NFT-focused and gas-free for users.

Significance in the Wiki

Immutable X documents the NFT scaling solution for USPS — and thus the B2C mass viability of crypto stamps. The gas cost advantage makes mass adoption editions like USPS Day of Dead 2021 (with 24,664 NFTs) economically viable.

In the crypto stamp universe:

• AT/NL/LU/BE/HR/PT, DE, IT: Polygon
• FR: Tezos
• JP: Rakuten Private
• US: Immutable X
• GG (halted): unknown
• GI: RSK/Rootstock
• LI, CH (Pioneer editions): Polygon (later)