Bridge token

Step-by-step guide for initiating cross-chain transfers using Token Bridge. Learn how to select assets, set amounts, and manage transaction parameters with role-based access control.

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This guide explains how to use the Token Bridge dialog to initiate cross-chain transfers.

Access Requirements

• View access: All users can view the form.
• Transaction access: Only users with the Spender user role can initiate transactions.

Form Components

Source Asset (“From”)

1. Token selection

   • Select from available tokens in your custodial wallet.
   • Tokens are sorted by:
     • Balance (high to low).
     • Token name alphabetically.
     • Chain name alphabetically.
   • Current wallet balance is displayed in the top right.

2. Amount input

   • Enter the amount to bridge.
   • Click “MAX” to use maximum available amount.
   • Amount must be within limits:
     • Minimum: Varies by token (see limits below).
     • Maximum: Lesser of available balance or maximum bridge amount.
   • Error messages:
     • “The minimum bridge amount is ”.
     • “The maximum bridge amount is ”.

Destination asset (“To”)

1. Token selection

   • Available tokens depend on source selection.
   • Sorted by:
     • Balance (high to low).
     • Token name alphabetically.
     • Chain name alphabetically.

2. Estimated receipt

   • Shows estimated amount to receive.
   • Updates automatically when source amount changes.
   • Refreshes every minute with latest rates.
   • Includes all applicable fees.

Transaction details

Estimated Time

• Shows expected completion time for the bridge transaction.

Transaction Fees

Displays total fees including:

• Source chain gas fees.
• Destination chain gas fees (if applicable).
• Cobo processing fees.

Amount to Receive

Two possible fee structures:

1. Prepay: Fees deducted from bridged amount.
   • Shown in estimated receipt amount.
2. Postpay: Fees charged in current billing period.
   • Full amount shown in estimated receipt.
   • UI indicates fees will be charged separately.

Receive Amount

• Displays final amount after all fees (if Prepay).
• Shows full amount before fees (if Postpay).

Actions

• Preview: Proceed to Token Bridge Preview page.
• Cancel: Close the form.
• X (Close): Close the form.

Token limits

USDT

• Networks: TRX, BNB, ETH
• Daily Limits per Organization: 10,000 - 5,000,000 USDT
• Platform Daily Limit: 50,000,000 USDT
• Fee: 0.1% (Postpay)

BTC

• Networks: BTC mainnet, ETH
• Minimum: 10 BTC per transaction
• Fees (Prepay):
  • Mint (BTC->WBTC):
    • 0-100: 0.35%
    • 100-300: 0.30%
    • 300-500: 0.26%
    • 500-1500: 0.23%
    • 1500+: 0.20%
  • Burn (WBTC->BTC):
    • 0-100: 0.50%
    • 100-300: 0.30%
    • 300-500: 0.23%
    • 500-1500: 0.19%
    • 1500+: 0.15%

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