AssociatedEvmAddress

Storage Map v261 → v411 Changed in v411

EVM address associated with a neuron position.

Queried by: developerswallets

The Big Picture

Bridges the gap between Substrate accounts and EVM addresses. Neurons can prove ownership of an EVM address, enabling cross-chain features and EVM-based access to Bittensor functionality.

Use Cases

Find EVM address for a neuron
Build cross-chain identity tools
Link EVM and Substrate accounts

From Chain Metadata

============================= ==== EVM related storage ==== ============================= DMAP (netuid, uid) --> (H160, last_block_where_ownership_was_proven)

Purpose & Usage

Purpose

Link Substrate neuron UIDs to EVM addresses for cross-chain identity.

Common Query Patterns

Query by (netuid, uid)

Query Keys

#	Name	Type	Description
1	netuid	u16	Subnet ID
2	uid	u16	Neuron UID on the subnet

Stored Value

(H160, u64)

.0
evm_address — H160 EVM-compatible address (20 bytes) associated with this neuron. Used by EVM-side tooling to map a Substrate neuron to an Ethereum-style address.
.1
ownership_proof_block — Last block number at which the EVM-side controller proved ownership of the associated H160 address. Used to age and re-validate the binding.

Relationships

Modified By

associate_evm_key

Related Events

EvmKeyAssociated

Code Examples

import { createClient, Binary } from "polkadot-api";
import { getWsProvider } from "polkadot-api/ws";
import { sub } from "@polkadot-api/descriptors"; // generated by: npx papi add sub -w wss://entrypoint-finney.opentensor.ai:443

const client = createClient(getWsProvider("wss://entrypoint-finney.opentensor.ai:443"));
const api = client.getTypedApi(sub);

// Query AssociatedEvmAddress storage
const netuid = 1;
const uid = 0;

const result = await api.query.SubtensorModule.AssociatedEvmAddress.getValue(netuid, uid);
console.log("AssociatedEvmAddress:", result);

On-Chain Activity

Write Frequency

●●○○○○ Minimal <10K est. writes

<10K estimated writes

#59 most written storage item

Write Source User Extrinsics

Modified via user-submitted extrinsics

As of block 7,429,232

Version History

Version:

v261 block 5,328,895 Added

v266–v272 · runtime versions skipped on chain (never deployed)

v273 block 5,659,032 Internal re-bind

v278–v289 · runtime versions skipped on chain (never deployed)

v290 block 5,947,548 Internal re-bind

v293–v296 · runtime versions skipped on chain (never deployed)

v297 block 6,067,943 Internal re-bind

v307–v314 · runtime versions skipped on chain (never deployed)

v315 block 6,414,634 Internal re-bind

v316–v319 · runtime versions skipped on chain (never deployed)

v320 block 6,523,566 Internal re-bind

v327–v333 · runtime versions skipped on chain (never deployed)

v334 block 6,811,690 Internal re-bind

v353–v360 · runtime versions skipped on chain (never deployed)

v361 block 7,063,679 Internal re-bind

v363–v364 · runtime versions skipped on chain (never deployed)

v365 block 7,135,419 Internal re-bind

v386–v390 · runtime versions skipped on chain (never deployed)

v391 block 7,782,857 Internal re-bind

v394–v400 · runtime versions skipped on chain (never deployed)

v401 block 8,036,576 Internal re-bind

v403–v410 · runtime versions skipped on chain (never deployed)

v411 block 8,283,784 Internal re-bind Current

Runtime Info

View Source

Pallet: SubtensorModule
Storage Kind: Map
First Version: v261
Current Version: v411

Back to SubtensorModule Storage