SIP-03 Migration Guide

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

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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.

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IBC is disabled

IBC (Inter-Blockchain Communication) is the Cosmos protocol that moved tokens between Sei and other Cosmos-SDK chains such as Noble, Kava, and Cosmos Hub. Assets that arrived this way exist on Sei as vouchers: an ibc/... denom in the bank module, backed by the real asset escrowed on the origin chain, redeemable only by sending the voucher back over the same channel it came in on. Both directions are now closed. Two parameters on Sei’s ibc module control this, and both are false: Each was set by a governance parameter change, which takes effect when the proposal executes. There is no separate upgrade or activation step. Inbound closed on May 12, 2026; outbound closed on July 31, 2026.

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What this means in practice

No longer possible:

• Bridging any asset onto Sei over IBC.
• Bridging any asset off Sei over IBC, including sending a voucher back to its origin chain to redeem the underlying asset.
• IBC-based migration routes, such as sending USDC.n back to Noble to convert it to native USDC, or routing ATOM and WBTC out through Skip:Go.
• The IBC precompile at 0x0000000000000000000000000000000000001009. Its transfer methods cannot succeed and there is no replacement. Do not build against it.

Unaffected:

• Native SEI transfers, staking, delegations, and rewards.
• The Sei EVM, ERC-20 tokens, and native and CW pointer contracts.
• Existing ibc/... balances in the bank module. They remain queryable and transferable between Sei addresses, including through their ERC-20 pointers. Only the redemption path off Sei is gone.
• Already-deployed CosmWasm contracts, which can still be executed and queried. Proposal #115 blocked only uploads and instantiations and is a separate change from the IBC parameters.

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Affected IBC assets

The assets below reached Sei over a bridge that is now closed. None of them has a route back to its origin chain. The Wormhole-bridged assets are not IBC vouchers and were not affected by Proposals #116, #120, or #121. They are listed here because Portal Bridge (legacy) is no longer available as a route off Sei.

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What you can still do

• Transfer within Sei. These balances move normally between Sei addresses and through their ERC-20 pointer contracts.
• Swap on a Sei DEX. Swaps do not use IBC and still execute. These tokens can no longer be redeemed for the underlying asset, so the liquidity available for them is limited and may decline further. Check the quote before you trade.
• Contact support. For anything else, including incomplete transfers and assets not listed above, reach out via Sei Tech Chat or Discord.

The mention of third-party platforms does not constitute an endorsement. Users should do their own research before using any third-party service.

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Key tools and resources

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1) Asset Transfer (Native ↔ EVM)

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

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2) USDC on Sei

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

• QuickStart: USDC on Sei
• Background: USDC & CCTP v2 announcement

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If you still hold USDC.n

The only remaining option on Sei is an on-chain swap, which does not use IBC:

• DragonSwap or Symphony. Slippage depends on whatever liquidity remains for USDC.n.

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

• Wind down and withdraw your positions if you have not already. Supplied USDC.n cannot be redeemed off Sei.

If you are holding a balance you cannot resolve this way, contact Sei Tech Chat or Discord.

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3) Address Association (Seistream)

Seistream’s SIP-03 migration page links your EVM (0x...) and Cosmos (sei1...) addresses for the native SEI token in three guided steps. It is a community-built tool that streamlines the standard association flow. Address association is the one-time, on-chain step that links your 0x... and sei1... addresses so a single key controls both. It must be completed before the SIP-03 upgrade — afterward, Cosmos (sei1...) interfaces stop working and addresses can no longer be associated. See Account Linking for how association works under the hood. What the tool does:

1. Connect wallet — connect any EVM wallet with an injected provider (MetaMask, Keplr, Rabby, Compass, Tangem, Trust Wallet, OKX, and most others).
2. Gas + association — cover the small amount of SEI needed for gas (Seistream provides a mainnet faucet to help), then submit the transaction that associates your 0x... and sei1... addresses on-chain. Any outgoing EVM transaction registers the link automatically.
3. Transfer from Cosmos — send your existing native SEI from the old Cosmos wallet to the linked sei1... address, where it becomes spendable from your EVM wallet.

This is a streamlined alternative to the manual association flow in Migrating a hardware or mnemonic-only wallet.

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Migrating a hardware or mnemonic-only wallet

If your wallet can export a raw private key, the simplest path is to import that key into an EVM wallet. A private key is independent of coin type, so it reproduces the same 0x... and sei1... addresses in any wallet, and no funds need to move. If your wallet cannot export a private key, you can still migrate by moving your funds to a new EVM-native account, as described below.

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When private-key export isn’t an option

A raw private key always works, but two common setups do not provide one:

• Mnemonic-only wallets. Some wallets back up only a recovery phrase, not a raw private key. Sei’s Cosmos (sei1...) accounts use coin type 118 (m/44'/118'/0'/0/0). Importing the same phrase into an EVM wallet such as MetaMask derives it on coin type 60 (m/44'/60'/0'/0/0), producing a different account with no access to the original funds. The underlying private key would import correctly if the wallet exposed it, but a mnemonic-only wallet does not.
• Hardware wallets (such as Ledger). A Ledger does not export the private key or seed under any circumstances. It only allows switching between the Cosmos app (coin type 118) and the Ethereum app (coin type 60), which control separate accounts with different addresses. The Cosmos-app account cannot be used from an EVM wallet.

For background, see HD Paths and Coin Types.

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Migration steps

This works because every account has exactly one EVM (0x...) address and one Cosmos (sei1...) address, both derived from the same key. Funds sent to the new account’s sei1... address are therefore spendable from the EVM wallet that holds its 0x... address.

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Notes and limitations

• Complete this before the SIP-03 upgrade. After the Cosmos interface is deprecated, addresses can no longer be associated and sei1... transfers can no longer be broadcast. Steps 3 and 4 must be completed beforehand.
• This procedure moves liquid balances only. Staked SEI must be unbonded first, and the unbonding period is 21 days. See the staking question in the FAQ.
• Associate before sending. Associating the new account before transferring ensures the funds arrive at the correct, immediately spendable address rather than a temporary holding address.
• Optional verification. To confirm the paired sei1... address independently, call getSeiAddr(0x...) on the addr precompile. See Query Linked Addresses.

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FAQ

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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.

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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.

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My wallet only shows a recovery phrase, or I use a Ledger — how do I migrate?

If you can export a raw private key, import it into an EVM wallet. This always works, because the key reproduces the same addresses in any wallet. If you cannot (a wallet that exports only a recovery phrase, or a Ledger that only switches between apps), create a new account in an EVM wallet you control, fund it with a small amount of SEI, associate it to reveal its paired sei1... address, and send your existing Cosmos funds to that address. Send a 1 SEI test transfer first. See Migrating a hardware or mnemonic-only wallet for the full procedure.

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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 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.

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Can I still bridge assets into or out of Sei over IBC?

No. Inbound IBC was disabled by Proposal #116 and Proposal #120, and outbound IBC was disabled by Proposal #121 on July 31, 2026. Both the InboundEnabled and OutboundEnabled parameters on the ibc module are now false, so no IBC transfer in either direction will be accepted. See IBC is disabled.

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I hold an IBC asset on Sei — is it gone?

The balance is not gone. It still exists in the bank module, is still visible in explorers and wallets, and can still be transferred between Sei addresses and through its ERC-20 pointer. What is gone is the ability to send it back over IBC to redeem the underlying asset on its origin chain. See What you can still do.

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

USDC.n can no longer be redeemed. The migration route (sending it back to Noble over IBC and reissuing native USDC through Circle’s CCTP) required outbound IBC, which Proposal #121 disabled on July 31, 2026. An on-chain swap to native USDC on a Sei DEX does not use IBC and still executes, subject to whatever liquidity remains. See If you still hold USDC.n above, or read the original announcement for background: Holders of USDC.n Need to Swap or Migrate.