Muxed accounts should now be enabled by default.

[Shaptic]

Muxed accounts (introduced into the protocol in CAP-27 and defined in its string form in SEP-23) should now be supported by default. Previously, we asked that they be hidden behind an opt-in feature flag; now, they should always be supported.

The following fields are muxed accounts and can thus be either a standard G... or a muxed M... address:

• FeeBumpTransaction.feeSource
• Transaction.sourceAccount
• Operation.sourceAccount
• Payment.destination
• PathPaymentStrictReceive.destination
• PathPaymentStrictSend.destination
• AccountMerge.destination
• Clawback.from

While the list above should be comprehensive, you can always refer to the XDR for an authoritative source of truth.

Refer to the following releases for reference implementations:

• Go: horizonclient@v9.0.0
• JavaScript: stellar-base@v7.0.0 and stellar-sdk@v10.0.0
• Java: java-stellar-sdk@v0.31.0
• Python: py-stellar-base@v7.0.0

Additional documentation is available in the glossary.

[elucidsoft]

PR #351

This is working, we are going to add missing unit tests for each operation to ensure nothing was missed. Once all those are passing we will publish.