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This feature introduces a maker–checker workflow (“Four Eyes Principle”) to on-chain transfers, ensuring that any transfer initiated by one User must be explicitly approved by another authorized User before it is executed.
This release applies only to on-chain stablecoin transfers (wallet transfers, batch transfers, and bridging).

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How Transfer Approvals work

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Approvals on Dashboard

  • Members can initiate wallet transfers (onramp/offramp restricted to Admins)
  • Member transfers require Admin approval before execution
  • Email notifications sent for approvals/rejections
  • Admin transfers execute without approval

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Approvals on API

A new parameter requireApproval can be included when creating transfers. If set to true, the transfer will enter the approval workflow until it is approved or rejected.

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Create Transfer with Approval

curl --request POST \
     --url https://production.hifibridge.com/v2/wallets/transfers \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '{
  "currency": "usdc",
  "amount": 100,
  "chain": "POLYGON",
  "source": {
    "userId": "user-id"
  },
  "destination": {
    "userId": "user-id"
  },
  "requireApproval": true
}'
The parameter defaults to false, so existing integrations are unaffected. This gives you the flexibility to define your own rules for when Admin approval is required.

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Endpoints

  • POST /wallets/transfers – stablecoin to stablecoin
  • POST /wallets/transfers/batches – stablecoin batch
  • POST /wallets/bridges – stablecoin bridging
Because bridging is quote based, quotes are only generated after approval. This ensures that they do not expire while waiting for review.

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Notifications

  • Admins receive email notifications when a transfer is pending approval.
  • Members receive email notifications when their transfer request is approved or rejected.

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Webhooks

If your organization has enabled webhooks, you can also listen for transfer approval events:
  • TRANSFER.APPROVAL.PENDING - Request for approval
  • TRANSFER.APPROVAL.APPROVED - Transfer was approved
  • TRANSFER.APPROVAL.REJECTED - Transfer was rejected
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