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- ADD_CHAIN138_TO_LEDGER_LIVE: Ledger form done; public code review repo bis-innovations/LedgerLive; init/push commands - CONTRACT_DEPLOYMENT_RUNBOOK: Chain 138 gas price 1 gwei, 36-addr check, TransactionMirror workaround - CONTRACT_*: AddressMapper, MirrorManager deployed 2026-02-12; 36-address on-chain check - NEXT_STEPS_FOR_YOU: Ledger done; steps completable now (no LAN); run-completable-tasks-from-anywhere - MASTER_INDEX, OPERATOR_OPTIONAL, SMART_CONTRACTS_INVENTORY_SIMPLE: updates - LEDGER_BLOCKCHAIN_INTEGRATION_COMPLETE: bis-innovations/LedgerLive reference Co-authored-by: Cursor <cursoragent@cursor.com>
107 lines
3.4 KiB
Markdown
107 lines
3.4 KiB
Markdown
# Fix cUSDT and cUSDC Decimals in MetaMask
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**Last Updated:** 2026-01-31
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**Document Version:** 1.0
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**Status:** Active Documentation
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---
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## Issue
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MetaMask is not displaying decimals correctly for cUSDT and cUSDC tokens (should show 6 decimals).
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## Root Cause
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MetaMask may have cached incorrect token metadata when the tokens were first added. The contracts correctly return 6 decimals, but MetaMask needs to refresh the metadata.
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## Solution
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### Option 1: Remove and Re-add Tokens (Recommended)
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1. **Remove the tokens from MetaMask:**
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- Open MetaMask
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- Go to the token list
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- Find cUSDT and cUSDC
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- Click the three dots (⋮) next to each token
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- Select "Hide token" or "Remove token"
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2. **Re-add the tokens:**
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- Click "Import tokens" in MetaMask
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- For **cUSDT**:
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- Token Contract Address: `0x93E66202A11B1772E55407B32B44e5Cd8eda7f22`
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- Token Symbol: `cUSDT`
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- Decimals of Precision: `6` ⚠️ **Make sure to enter 6 manually**
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- For **cUSDC**:
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- Token Contract Address: `0xf22258f57794CC8E06237084b353Ab30fFfa640b`
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- Token Symbol: `cUSDC`
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- Decimals of Precision: `6` ⚠️ **Make sure to enter 6 manually**
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3. **Click "Add Custom Token"** and confirm
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### Option 2: Use Updated Token List
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1. **Import the token list:**
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- Go to MetaMask Settings → Security & Privacy
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- Scroll to "Token List"
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- Add the token list URL (if hosted) or import the JSON file:
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- File: `docs/04-configuration/metamask/METAMASK_TOKEN_LIST.json`
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- The token list now includes cUSDT and cUSDC with correct decimals (6)
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2. **Refresh MetaMask:**
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- Close and reopen MetaMask
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- The tokens should now display with correct decimals
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### Option 3: Clear MetaMask Cache
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1. **Clear browser cache** (if using browser extension):
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- Chrome: Settings → Privacy → Clear browsing data → Cached images and files
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- Firefox: Settings → Privacy → Clear Data → Cached Web Content
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2. **Reset MetaMask state** (last resort):
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- Settings → Advanced → Reset Account
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- ⚠️ **Warning**: This will clear transaction history but won't affect your funds
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## Verification
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After applying the fix, verify the decimals are correct:
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1. Check token balance in MetaMask
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2. The balance should display as: `20,000,000.000000` (with 6 decimal places)
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3. If it shows as `20,000,000` or `20000000` without decimals, the fix didn't work
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## Token Details
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- **cUSDT**:
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- Address: `0x93E66202A11B1772E55407B32B44e5Cd8eda7f22`
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- Symbol: `cUSDT`
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- Decimals: `6`
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- Name: `Compliant Tether USD`
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- **cUSDC**:
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- Address: `0xf22258f57794CC8E06237084b353Ab30fFfa640b`
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- Symbol: `cUSDC`
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- Decimals: `6`
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- Name: `Compliant USD Coin`
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## On-Chain Verification
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You can verify the decimals are correct on-chain:
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```bash
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# Check cUSDT decimals
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cast call 0x93E66202A11B1772E55407B32B44e5Cd8eda7f22 "decimals()" --rpc-url http://192.168.11.211:8545
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# Check cUSDC decimals
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cast call 0xf22258f57794CC8E06237084b353Ab30fFfa640b "decimals()" --rpc-url http://192.168.11.211:8545
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```
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Both should return `6`.
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## Updated Files
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The following token list files have been updated with cUSDT and cUSDC:
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- `docs/04-configuration/metamask/METAMASK_TOKEN_LIST.json`
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- `docs/04-configuration/metamask/METAMASK_TOKEN_LIST.tokenlist.json`
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- `metamask-integration/docs/METAMASK_TOKEN_LIST.json`
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- `token-lists/lists/dbis-138.tokenlist.json` (already had them)
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All token lists now specify `"decimals": 6` for both tokens.
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