element-x-ada/docs/build-logs/polish-result.md

Element X ADA Polish Tasks - Completed

Date: 2026-03-29

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Task 1: isDM Detection — Fixed

Problem: The wallet button was using overly broad logic:

isDmRoom = roomInfo.isDm || roomInfo.activeMembersCount == 2L

This would show the wallet button in ANY 2-person room, including private rooms that aren't DMs.

Solution: Simplified to use only the proper isDm property:

isDmRoom = roomInfo.isDm

The RoomInfo.isDm extension property already implements the correct logic:

val RoomInfo.isDm get() = isDm(isDirect, activeMembersCount.toInt())

fun isDm(isDirect: Boolean, activeMembersCount: Int): Boolean {
    return isDirect && activeMembersCount <= 2
}

This ensures the wallet button only appears in genuine 1:1 DM rooms where:

• isDirect is true (Matrix spec DM flag)
• At most 2 active members

Commit: faa6f768f6 - fix(wallet): use proper isDm check for wallet button visibility

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Task 2: Payment Card UI — Polished

Added: Truncated recipient/sender address display

The payment card now shows:

• Header: Cardano icon + "Sent" or "Received" label + testnet badge
• Amount: Large bold text (e.g., "10 ADA")
• Address: "To: addr_tes...ytjqp" for sent / "From: addr_tes...pd0hq" for received
• Status: Chip with spinner (pending), checkmark (confirmed), or X (failed)
• Tx hash: Truncated (first 8...last 8), tappable to open CardanoScan
• Explorer link: "View on CardanoScan →" for confirmed transactions

Changes:

1. TimelineItemPaymentContent.kt:

   • Added truncatedToAddress and truncatedFromAddress computed properties
   • Added truncateAddress() helper (first 8 + last 6 chars)

2. TimelineItemPaymentView.kt:

   • Added address row showing "To:" or "From:" with truncated address

3. TimelineItemPaymentContentWrapper.kt:

   • Exposed new truncated address properties

Commit: 699807e1bd - feat(wallet): add recipient address to payment card UI

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APK Available

Fresh arm64 build served at:

http://192.168.0.5:8888/app-fdroid-arm64-v8a-debug.apk

Size: ~210 MB

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Code Quality Notes

• Used existing RoomInfo.isDm extension rather than reinventing logic
• Address truncation follows same pattern as tx hash (first N...last M)
• Payment card remains clean and intentional — not a debug dump
• All changes respect 160 char ktlint limit
• No new dependencies added

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Task 3: Cardano Address in Matrix Account Data — Implemented

Publishing (Write Side)

After wallet creation, import, or SSSS restore, the user's Cardano address is automatically published to Matrix account data:

• Key: com.sulkta.cardano.address
• Content: { "address": "addr1..." }
• Public/unencrypted — this is a discovery mechanism, not a secret

Where it's called:

• WalletSetupPresenter → after all wallet setup completion paths
• Fire-and-forget — wallet setup doesn't fail if publish fails

Lookup (Read Side)

When entering a Matrix user ID in the /pay payment form:

1. System looks up their com.sulkta.cardano.address account data
2. If found → auto-fills recipient, shows "Address loaded from @user's profile ✓"
3. If not found → shows "@user hasn't linked a wallet", allows manual entry

New UI States:

• RecipientResolutionState.Resolving — spinner while looking up
• RecipientResolutionState.Found — green card with checkmark and truncated address
• RecipientResolutionState.NeedsManualEntry — red card prompting manual entry

New Files

• CardanoAddressService.kt (wallet:api) — interface
• DefaultCardanoAddressService.kt (wallet:impl) — implementation using OkHttp + SessionStore

Modified Files

• WalletSetupPresenter.kt — calls publishAddressToMatrix() after wallet setup
• PaymentEntryPresenter.kt — looks up recipient address on Matrix user input
• PaymentEntryState.kt — added Resolving and Found states
• PaymentEntryView.kt — added lookup progress and result cards

Commit: c35289a3bd

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Final APK

Fresh arm64 build with all three tasks:

http://192.168.0.5:8888/app-fdroid-arm64-v8a-debug.apk

All Commits

1. faa6f768f6 — fix(wallet): use proper isDm check for wallet button visibility
2. 699807e1bd — feat(wallet): add recipient address to payment card UI
3. c35289a3bd — feat(wallet): store Cardano address in Matrix account data for discovery