Appendix B · Precompile addresses

TRN exposes its native pallets to the EVM through precompiles at deterministic addresses. The address-derivation rules below let you compute the EVM address for any asset, collection, or futurepass without an indexer.

Singleton precompiles

Precompile	EVM address	Pallet	Reference
DEX router	0x000000000000000000000000000000000000DDDD	Dex	DEX precompile
FuturePass registrar	0x000000000000000000000000000000000000FFFF	FuturePass	FuturePass precompile
FeeProxy	0x00000000000000000000000000000000000004BB	FeeProxy	FeeProxy precompile

Address-derivation rules

Resource	EVM address rule
ERC-20 mirror of asset id N	0xCCCCCCCC + 24-bit big-endian asset-id padded to 12 bytes — i.e. 0xCCCCCCCC000000000000000000000000<assetIdHex>.
ERC-721 collection with collection id N	0xAAAAAAAA + 24-bit big-endian collection id padded to 12 bytes — i.e. 0xAAAAAAAA00000000000000000000000<collectionIdHex>.
ERC-1155 (SFT) collection with collection id N	0xBBBBBBBB + 24-bit big-endian collection id padded to 12 bytes — i.e. 0xBBBBBBBB00000000000000000000000<collectionIdHex>.
FuturePass for owner	Returned by FuturePassRegistrar.futurepassOf(owner).

The 0xCCCC / 0xAAAA / 0xBBBB prefixes are stable across releases. Always use the precompile registrar (or assetIdToAddress helpers in the SDKs) rather than hard-coding the derived address.

Where to confirm at runtime

// Substrate side
const address = api.consts.assetsExt.palletId.toHex(); // anchor address for asset prefixes

// EVM side (viem)
import { encodeAbiParameters, getAddress } from 'viem';
const erc20For = (assetId: number) =>
  getAddress('0xCCCCCCCC' + assetId.toString(16).padStart(24, '0'));

Sourced from the EVM precompile pages and the @therootnetwork/evm README. Verify against the live ABI on rootscan.io before relying on these in production.