Real-World Assets

Real-world assets (RWAs) model off-chain assets whose ownership or control is tracked on-chain. In Iroha, an RWA is a registered ledger lot with a generated identifier, an owner account, a quantity, business metadata, provenance, and optional lifecycle controls.

RWAs are different from numeric asset balances:

• a numeric asset is a fungible balance held by an account
• an NFT is a unique on-chain record with one owner
• an RWA is a lot that can carry business metadata, quantity, holds, freezes, redemption state, provenance, and controller policy

Use RWAs when the ledger needs to represent a specific off-chain lot instead of only a fungible balance.

RWA Lot

An RWA lot contains:

• id: the generated canonical RWA identifier, displayed as <hash>$<domain>
• owned_by: the account that currently owns the lot
• quantity: the outstanding quantity represented by the lot
• spec: quantity specification, such as decimal scale
• primary_reference: the main off-chain receipt, certificate, invoice, or registry reference
• status: optional business status text
• metadata: compact JSON fields used for business context and indexing
• parents: source lots used to derive this lot
• controls: controller accounts, controller roles, and enabled controller operations
• is_frozen and held_quantity: lifecycle state enforced by the runtime

Keep the on-chain payload compact. Store large legal documents, inspection reports, and audit bundles outside the WSV, then put a digest, URI, SoraFS path, or manifest reference in RWA metadata.

Identifiers

RegisterRwa does not accept a caller-chosen id, and it does not accept an owner field. The transaction authority becomes the initial owned_by account, and the runtime generates the RwaId in the target domain.

The textual form of an RWA ID is:

<generated-hash>$<domain>

For example:

0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef$commodities.universal

Applications should store their business identifier in primary_reference or metadata, then discover the generated RwaId from RwaEvent::Created, FindRwas, /v1/rwas, or the explorer route set after the transaction commits.

Lifecycle

Common RWA workflows include:

Operation	Implemented behavior
RegisterRwa	Create a generated-ID lot in a domain; the transaction authority becomes owned_by.
TransferRwa	Move quantity to another account. A full transfer can change owned_by; a partial transfer creates a generated child lot.
HoldRwa	Reserve quantity. Requires a configured controller and hold_enabled.
ReleaseRwa	Remove held quantity. Requires a configured controller and hold_enabled.
FreezeRwa	Block ordinary owner operations. Requires a configured controller and freeze_enabled.
UnfreezeRwa	Re-enable ordinary owner operations. Requires a configured controller and freeze_enabled.
RedeemRwa	Retire quantity. Requires the owner or a controller and redeem_enabled.
MergeRwas	Combine quantities from parent lots with the same domain and spec into a generated child lot.
ForceTransferRwa	Move quantity through a controller flow. Requires a configured controller and force_transfer_enabled.
SetRwaControls	Replace the lot control policy. Requires the owner or a controller.
SetKeyValue<Rwa> / RemoveKeyValue<Rwa>	Update lot metadata. Requires the owner or a controller; frozen lots require a controller.

There is no UnregisterRwa instruction in the current code. Retire an off-chain lot with RedeemRwa when the represented quantity is delivered, consumed, settled, or otherwise removed from circulation.

Metadata and Controls

Use metadata for compact facts that help applications identify and verify the lot:

• asset class, issuer, custodian, or registry reference
• warehouse, vault, ISIN, invoice, or certificate identifiers
• content hashes for attestations and legal documents
• SoraFS paths or manifest references for larger evidence bundles
• maturity, jurisdiction, or compliance tags used by off-chain services

The implemented RwaControlPolicy has these fields:

{
  "controller_accounts": [],
  "controller_roles": [],
  "freeze_enabled": true,
  "hold_enabled": true,
  "force_transfer_enabled": false,
  "redeem_enabled": true
}

Controller accounts and roles are allowed to perform only the controller operations enabled by the corresponding boolean flag. The current control payload is not an allow-list transfer policy and does not contain nested transfers rules.

Queries, Events, and APIs

Use FindRwas to list registered RWA lots. Applications that need live updates can subscribe to Rwa data events for created, owner-changed, split, merged, redeemed, frozen, unfrozen, held, released, force-transferred, controls-changed, and metadata events.

Torii exposes chain-state routes such as /v1/rwas and /v1/rwas/query, plus explorer routes such as /v1/explorer/rwas and /v1/explorer/rwas/{rwa_id} when that route family is enabled. Generated clients should prefer the live /openapi document for the exact response shape exposed by a node.

Try It on Taira

Check whether public Taira currently has registered RWA lots:

curl -fsS 'https://taira.sora.org/v1/rwas?limit=5' \
  | jq '{total, rwa_ids: [.items[].id]}'

List the RWA routes exposed by the live Taira OpenAPI document:

curl -fsS https://taira.sora.org/openapi.json \
  | jq -r '.paths | keys[] | select(startswith("/v1/rwas") or startswith("/v1/explorer/rwas"))'

Empty items output is expected when no public lots have been registered yet. Registration, transfer, hold, freeze, and redemption are signed transactions.

Try It

The examples below use the Python SDK surfaces from Shared Setup. Replace the account IDs, private keys, and generated lot IDs with values from your own network before submitting a transaction.

Discover RWA API Routes

This read-only example asks a running Torii node which app-facing RWA routes are enabled:

from iroha_python import create_torii_client

client = create_torii_client("https://taira.sora.org")
openapi = client.request_json("GET", "/openapi", expected_status=(200,))

rwa_paths = sorted(
    path for path in openapi.get("paths", {}) if path.startswith("/v1/rwas")
)

for path in rwa_paths:
    print(path)

If the list is empty, the node may still support RWA instructions and queries through other Torii APIs, but it is not exposing the optional JSON route family.

Register a Warehouse Receipt

Use a draft when one business action should become one signed transaction. The business receipt number goes in primary_reference; the ledger ID is generated after the transaction commits.

from iroha_python import TransactionConfig, TransactionDraft

config = TransactionConfig(
    chain_id=CHAIN_ID,
    authority=alice,
    metadata={**TX_METADATA, "source": "rwa-docs"},
)

draft = TransactionDraft(config)
draft.register_rwa(
    {
        "domain": "commodities.universal",
        "quantity": "100",
        "spec": {"scale": 0},
        "primary_reference": "warehouse-receipt-001",
        "status": "active",
        "metadata": {
            "asset_class": "commodity",
            "commodity": "copper",
            "warehouse": "DXB-01",
            "inspection_report": "sorafs://reports/copper-001.json",
        },
        "parents": [],
        "controls": {
            "controller_accounts": [alice],
            "controller_roles": [],
            "freeze_enabled": True,
            "hold_enabled": True,
            "force_transfer_enabled": False,
            "redeem_enabled": True,
        },
    }
)

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

After the transaction commits, list generated RWA IDs. Chain-state routes expose the canonical IDs; use events or explorer detail routes when you need to match an ID back to primary_reference or metadata:

page = client.list_rwas_typed(limit=20, offset=0)

for lot in page.items:
    print(lot.id)

Explorer-enabled nodes can also return richer projections:

page = client.list_explorer_rwas_typed(domain="commodities.universal")

for lot in page.items:
    print(lot.id, lot.primary_reference, lot.owned_by, lot.quantity)

Transfer With a Temporary Hold

Use the generated RWA ID returned by the chain. This example assumes alice is the owner and is also configured as a controller with hold_enabled.

warehouse_lot_id = (
    "0123456789abcdef0123456789abcdef"
    "0123456789abcdef0123456789abcdef$commodities.universal"
)

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)

draft.transfer_rwa(warehouse_lot_id, quantity="10", destination=bob)
draft.hold_rwa(warehouse_lot_id, quantity="5")

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

Release the hold when the off-chain process is complete:

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)
draft.release_rwa(warehouse_lot_id, quantity="5")

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

Add Controls and Audit Metadata

Controls and metadata are separate. Use controls for controller policy, and metadata for facts that applications or auditors need to display:

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)

draft.set_rwa_controls(
    warehouse_lot_id,
    {
        "controller_accounts": [alice],
        "controller_roles": [],
        "freeze_enabled": True,
        "hold_enabled": True,
        "force_transfer_enabled": True,
        "redeem_enabled": True,
    },
)
draft.set_rwa_key_value(warehouse_lot_id, "auditor", "alice")
draft.set_rwa_key_value(
    warehouse_lot_id,
    "proof_hash",
    "sha256:2b1c7a4e...",
)

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

Redeem or Retire Quantity

Redeem quantity when the represented off-chain asset has been delivered, consumed, retired, or otherwise removed from circulation. The lot must have redeem_enabled, and the signer must be the owner or a controller.

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)
draft.redeem_rwa(warehouse_lot_id, quantity="1")

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

Freeze During Compliance Review

Freeze a lot when an off-chain review must block ordinary owner operations. The signer must be a controller and the lot must have freeze_enabled.

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)
draft.freeze_rwa(warehouse_lot_id)
draft.set_rwa_key_value(
    warehouse_lot_id,
    "review",
    {
        "status": "frozen",
        "reason": "custodian inventory check",
        "case_id": "OPS-2026-0042",
    },
)

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

Unfreeze it when the review passes:

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)
draft.unfreeze_rwa(warehouse_lot_id)
draft.set_rwa_key_value(
    warehouse_lot_id,
    "review",
    {"status": "cleared", "case_id": "OPS-2026-0042"},
)

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

Invoice Receivable

Represent an invoice as an RWA lot by storing the invoice number in primary_reference and metadata. After registration, use the generated ID for transfer and redemption.

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)
draft.register_rwa(
    {
        "domain": "receivables.universal",
        "quantity": "50000",
        "spec": {"scale": 2},
        "primary_reference": "INV-2026-0007",
        "status": "issued",
        "metadata": {
            "asset_class": "invoice",
            "currency": "USD",
            "debtor": "example-buyer",
            "due_date": "2026-06-30",
            "document_hash": "sha256:4df4c8...",
        },
        "parents": [],
        "controls": {
            "controller_accounts": [alice],
            "controller_roles": [],
            "freeze_enabled": True,
            "hold_enabled": False,
            "force_transfer_enabled": False,
            "redeem_enabled": True,
        },
    }
)

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

When the receivable is financed or paid, use the generated invoice lot ID:

invoice_lot_id = (
    "fedcba9876543210fedcba9876543210"
    "fedcba9876543210fedcba9876543210$receivables.universal"
)

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)
draft.transfer_rwa(invoice_lot_id, quantity="50000", destination=bob)

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

Redeem the represented amount after off-chain settlement:

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=bob, metadata=TX_METADATA)
)
draft.redeem_rwa(invoice_lot_id, quantity="50000")

envelope = draft.sign_with_keypair(bob_pair)
client.submit_transaction_envelope_and_wait(envelope)

Carbon Credit Retirement

Use redemption to retire credits after they are claimed. The metadata points to the off-chain certificate or registry proof:

carbon_lot_id = (
    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa$carbon.universal"
)

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)
draft.redeem_rwa(carbon_lot_id, quantity="250")
draft.set_rwa_key_value(
    carbon_lot_id,
    "retirement_certificate",
    "sorafs://certificates/carbon-credit-2026-001-retired.json",
)

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

Merge Two Lots

Merge lots when two off-chain positions are consolidated. The parents must be in the same domain and use the same quantity spec. The runtime generates the child lot ID.

warehouse_lot_id_2 = (
    "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
    "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb$commodities.universal"
)

draft = TransactionDraft(
    TransactionConfig(chain_id=CHAIN_ID, authority=alice, metadata=TX_METADATA)
)
draft.merge_rwas(
    {
        "parents": [
            {"rwa": warehouse_lot_id, "quantity": "40"},
            {"rwa": warehouse_lot_id_2, "quantity": "60"},
        ],
        "primary_reference": "warehouse-receipt-003",
        "status": "merged",
        "metadata": {
            "asset_class": "commodity",
            "commodity": "copper",
            "warehouse": "DXB-01",
            "merge_reason": "same custodian and quality grade",
        },
    }
)

envelope = draft.sign_with_keypair(alice_pair)
client.submit_transaction_envelope_and_wait(envelope)

For the full Python transaction example, see Real-World Assets.

Related Docs

• Assets
• Metadata
• Iroha Special Instructions
• Queries
• Torii endpoints