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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-3 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)

  • Use the official Sei App to move assets between native (Keplr/Leap/Fin) and EVM (MetaMask/Compass etc.) addresses: Sei App Transfer  or the Bridge tab at Sei App Bridge .

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-3 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?

If you are already using an EVM-compatible wallet, nothing changes. If you previously staked using Keplr or Leap, you must unbond your stake and then migrate assets to an EVM wallet using the Asset Transfer tool.

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-3 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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