Grin Full Node Backup - MAINNET
Created       : 2026-02-19 23:15:57 UTC
Network       : MAINNET
Node type     : FULL
P2P Port : 3414 (mainnet default)
Next refresh  : 2026-02-23 at 00:00 UTC (Monday)

Download original Grin node binary from:
https://github.com/mimblewimble/grin/releases

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DOWNLOAD INSTRUCTIONS
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A. For Linux

1. Download the backup file and checksum
   File:     grin_full_mainnet_20260219.tar.gz  (or .part* files if split)
   Checksum: grin_full_mainnet_20260219.sha256

2. Verify integrity before extracting
   sha256sum -c grin_full_mainnet_20260219.sha256

3. Extract
   tar -xzf grin_full_mainnet_20260219.tar.gz

4. Replace your chain_data
   - Stop your Grin node first
   - Remove old:  rm -rf /path/to/grin/chain_data
   - Move new:    mv chain_data /path/to/grin/

5. Configure grin-server.toml
   - If missing, generate it: grin server config
   - Set the following values:
     archive_mode = true
   chain_type = "Mainnet"

6. Start your Grin node

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B. For Windows 10/11 (PowerShell - tar is built-in, no 7-Zip needed)

1. Download all files to a folder (e.g., C:\Downloads\grin)

2. Open PowerShell in that folder
   Shift + Right-click the folder → "Open PowerShell window here"

3. Verify integrity before extracting
   Get-FileHash -Algorithm SHA256 grin_full_mainnet_20260219.tar.gz
   Compare the hash shown with the value inside grin_full_mainnet_20260219.sha256

4. Extract
   tar -xzf grin_full_mainnet_20260219.tar.gz

5. Replace your chain_data
   - Stop Grin node first
   - Backup old (optional): Rename C:\Users\<user>\.grin\main\chain_data to chain_data.old
   - Copy new chain_data to: C:\Users\<user>\.grin\main
6. Configure grin-server.toml
   Location: C:\Users\<user>\.grin\main\grin-server.toml
   Set the following values:
     archive_mode = true
   chain_type = "Mainnet"

7. Start your Grin node

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C. For Grim Wallet (https://gri.mw)

Grim wallet uses the same Grin node backend. Only chain_data is replaced -
your wallet and transaction history are not affected.

1. Download and verify the backup (see section A or B above)

2. Extract to get the chain_data folder

3. Stop Grim wallet if running

4. Locate your Grim data directory:
   Windows : C:\Users\<user>\.grim\main   Linux   : ~/.grim/main/
   macOS   : ~/Library/Application Support/grim/main/

5. Replace chain_data
   - Optional: rename existing chain_data to chain_data.old as backup
   - Delete or rename: .grim\main\chain_data
   - Move extracted chain_data to: .grim\main
6. Configure grin-server.toml
   Location: .grim\main\grin-server.toml
   Set the following values:
     archive_mode = true
   chain_type = "Mainnet"
   (If the file does not exist, Grim will create it on first run)

7. Start Grim wallet
   - Grim will use the new chain_data
   - First start may take a few minutes to verify the chain

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General Notes:
- archive_mode = true  → full node (complete history)
- archive_mode = false → pruned node (recent data only)
- chain_type = "Mainnet" uses port 3414
- chain_type = "Testnet" uses port 13414
- Disk space required:
    Full node   : ~30 GB extraction, 50 GB+ for stable operation
    Pruned node : ~10 GB extraction, 20 GB+ for stable operation
- chain_data location depends on db_root in grin-server.toml

Support: https://forum.grin.mw/