Replicating Morse to Shannon Migration in Testnet: Requirements & Open Questions

[breezytm]

🟠 Migration Requirements

• Snapshot: Capture fresh snapshots from both Morse Testnet and Mainnet.
• Faucet (MACT): Deploy a faucet to distribute MACT tokens for testing.

❓ Open Question

1. Will the claim transaction during Morse to Shannon migration incur a network fee?
If yes, how is that fee handled, especially given that wallets involved in the claim process only hold MACT tokens and not uPOKT?

[Olshansk]

1. Will the claim transaction during Morse to Shannon migration incur a network fee?

tl;dr No.

---

There are a lot of details but that is what the ante-handler was built for.

// newSigVerificationGasConsumer returns a SignatureVerificationGasConsumer that
// returns zero gas fees for transactions which meet the following criteria:
// - Has EXACTLY one signer
// - Contains AT LEAST one message
// - Contains ONLY morse claim messages (i.e. MsgClaimMorseAccount, MsgClaimMorseApplication, and MsgClaimMorseSupplier)
func newSigVerificationGasConsumer(
	sdkCtx cosmostypes.Context,
	app *App,
	tx cosmostypes.Tx,
) ante.SignatureVerificationGasConsumer {
	// Use the freeSecp256k1SigGasConsumer if:
	// - The waive_morse_claim_gas_fees migration module param is true AND the tx:
	// - Has EXACTLY one signer
	// - Contains at least one message
	// - Contains ONLY Morse claim message(s)
	if shouldWaiveMorseClaimGasFees(sdkCtx, app, tx) {
		return freeSigGasConsumer
	}

	// Use the default signature verification gas consumer if ANY
	// non-morse-claim message type is included in the tx.
	return ante.DefaultSigVerificationGasConsumer
}

[bryanchriswhite]

1. Will the claim transaction during Morse to Shannon migration incur a network fee?

Fee waiving is supported for Txs that contain only Morse claim messages (i.e. MsgclaimMorseAccount, MsgClaimMorseApplication, MsgClaimMorseSupplier), so long as the waive_morse_claim_gas_fees is true, which it is already for testnet, and will be for mainnet once it's caught up on upgrades.