Pause transfers

Pause the TRANSFER feature during an incident without stopping issuance or cancellation. B20 grants pause and unpause through separate roles so you can separate emergency response from recovery authority.

Real-world asset (RWA) tokenization is one of many use cases for the B20 Asset standard. The examples on this page use a stock token for illustration; the same flows apply to other asset types.Coinbase tokenized equities are only available to persons in eligible jurisdictions outside of the U.S.Tokenized securities examples shown for illustration. Base is a general-purpose blockchain; issuance and compliance are the responsibility of the issuer under applicable law.

Demo

New to B20? See the B20 Token Standard for the concepts and a full launch walkthrough. These samples target base-std@v1.0.0, viem@2.55.11, and Base Foundry v1.1.1.

Pause and resume stock transfers

import { type Address } from "viem";
import { publicClient } from "../../shared/clients.js";
import { b20Abi } from "../abi.js";
import { sendContract } from "../write.js";

export async function setStockTransfersPaused(token: Address, paused: boolean) {
  await sendContract({ address: token, abi: b20Abi, functionName: paused ? "pause" : "unpause", args: [[0]] });
  const current = await publicClient.readContract({ address: token, abi: b20Abi, functionName: "isPaused", args: [0] });
  if (current !== paused) throw new Error("Unexpected transfer pause state");
}

base-cast send "$TOKEN_ADDRESS" "pause(uint8[])" "[0]" \
  --rpc-url "$RPC_URL" --private-key "$PRIVATE_KEY"
base-cast call "$TOKEN_ADDRESS" "isPaused(uint8)(bool)" 0 --rpc-url "$RPC_URL"
base-cast send "$TOKEN_ADDRESS" "unpause(uint8[])" "[0]" \
  --rpc-url "$RPC_URL" --private-key "$PRIVATE_KEY"

See the complete verified B20 examples for imports, client construction, and runnable projects.

Transfer pause state changes without pausing mint or burn.

Pause and unpause use separate roles. Grant recovery authority more narrowly than emergency pause authority.

Build on Base

Issue Stablecoins

Integrate DeFi

Issue RWA

Accept Payments

Private Transactions

Demo

Pause and resume stock transfers

See also

​Demo

​Pause and resume stock transfers

​See also

Demo

Pause and resume stock transfers

See also