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LearnSIP-03 Migration

SIP-03 Migration

Holders of USDC.n must swap or migrate before end of March 2026.

If you hold USDC.n  (USDC via Noble), you need to swap or migrate to native USDC before the SIP-03 upgrade (expected end of March 2026) to avoid losing access to your assets. After the upgrade, Sei will no longer support Cosmos-native assets like USDC.n.

For full details, steps, and timelines, see: Holders of USDC.n Need to Swap or Migrate  and the instructions below.

This page consolidates the most important, practical actions for the SIP-03 migration and links to the official resources.

For the full proposal text, see:

What most users need to do

  • If you use Keplr or Leap (Cosmos-style wallets) and hold assets on the native address (sei1…), you should move assets to an EVM-compatible address (0x…). Use the Asset Transfer tool linked below.
  • If you use Compass or another EVM wallet already, you’re good — continue as normal.

Key tools and resources

1) Asset Transfer (Native ↔ EVM)

When to use this:

  • You used Keplr or Leap before and want assets available via an EVM wallet going forward.
  • You need to access tokens on apps that now expect an EVM (0x) address.

2) Astroport recovery

If you previously provided liquidity or held positions in Astroport pools on Sei, use the Astroport recovery flow to withdraw residual funds.

3) USDC on Sei

Native USDC and Circle’s CCTP V2 are now supported on Sei. USDC from Noble (USDC.n) is deprecated.

How to swap or migrate USDC.n

Swap (smaller amounts):

Migrate (larger amounts):

  • Use the USDC Migration Tool  — this batches and migrates your USDC.n to native USDC via Noble → Polygon → Sei using Circle’s CCTP.
  • Manual migration: Bridge USDC.n via Stargate  to an intermediary chain with CCTP v1 and v2 (e.g., Base), then use CCTP to burn/mint native USDC back to Sei.
  • Other useful bridging frontends: CCTP Exchange 

For DeFi suppliers of USDC.n (Yei, Takara Lend, etc.):

  • Wind down and withdraw your positions before migrating to native USDC. Failure to do so before the SIP-03 upgrade may result in inability to access your supplied assets.

FAQ

I am a Keplr / Leap wallet user; do I need to do anything?

Yes. Use the Asset Transfer tool to ensure your assets are available via an EVM wallet. See Asset Transfer above.

I use Compass wallet; do I need to do anything?

No action needed. Compass ensures your assets are available via EVM. Continue connecting to Sei like any EVM chain.

I previously provided liquidity in Astroport — how do I retrieve my funds?

Use Astroport’s recovery flow to withdraw funds still in pools. See Astroport recovery above.

I stake SEI — do I need to do anything?

It depends on whether your Cosmos (sei1...) and EVM (0x...) addresses are associated (linked). Staking on Sei is handled by the Cosmos staking module. After SIP-03, Cosmos-native transaction interfaces will no longer be available — but the underlying staking state is preserved and accessible via EVM for associated addresses.

If your addresses are associated: No action is needed. After the upgrade, your existing delegations, rewards, and unbonding state will be fully accessible via EVM. You can continue managing your stake through an EVM wallet using the Staking Precompile, the Sei Dashboard , or the Sei Dashboard .

If your addresses are NOT associated: You must act before the upgrade. After SIP-03, you will not be able to associate addresses or manage delegations through a Cosmos wallet.

Your options:

  1. Associate your addresses before the upgrade. You can do this by connecting your Cosmos wallet on the Sei Dashboard  or by using any of the methods described in Accounts. Once associated, your staking state becomes accessible via EVM — no need to unbond.
  2. Unbond your stake and migrate assets to an EVM wallet using the Asset Transfer tool . The unbonding period is 21 days, so you must begin this process at least 21 days before the Cosmos shutdown to ensure your tokens are liquid in time.

To check whether your addresses are linked, see Query Linked Addresses.

Do not confuse address linking with staking migration. Even though sei1... and 0x... addresses point to the same underlying account once associated, the chain can only recognize this link after explicit association. Without association, your staked SEI will not be accessible via EVM after the upgrade, and you will have no way to unbond or claim rewards.

I hold USDC.n (USDC via Noble) — what should I do?

You must swap or migrate your USDC.n to native USDC before the SIP-03 upgrade (expected end of March 2026). After the upgrade, USDC.n may become inaccessible or lose its value on Sei. See the USDC on Sei section above for swap and migration options, or read the full announcement: Holders of USDC.n Need to Swap or Migrate .

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