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+# APDU Documentation
+
+  - [GET](#get)
+    - [GET APP CONFIGURATION](#get-app-configuration)
+    - [GET ETH PUBLIC ADDRESS](#get-eth-public-address)
+    - [GET ETH2 PUBLIC KEY](#get-eth2-public-key)
+  - [SIGN](#sign)
+    - [SIGN ETH TRANSACTION](#sign-eth-transaction)
+    - [SIGN ETH PERSONAL MESSAGE](#sign-eth-personal-message)
+    - [SIGN ETH EIP 712](#sign-eth-eip-712)
+  - [SET](#set)
+    - [SET EXTERNAL PLUGIN](#set-external-plugin)
+    - [SET PLUGIN](#set-plugin)
+    - [SET ETH2 WITHDRAWAL INDEX](#set-eth2-withdrawal-index)
+  - [Provide](#provide)
+    - [PROVIDE ERC 20 TOKEN INFORMATION](#provide-erc-20-token-information)
+    - [PROVIDE NFT INFORMATION](#provide-nft-information)
+
+<br/>
+<br/>
+<br/>
+
+## Global Instruction
+
+|Name|INS|
+|----|---|
+|[GET PUBLIC ADDRESS](#get-eth-public-address)|0x02|
+|[SIGN](#sign-eth-transaction)|0x04|
+|[GET APP CONFIGURATION](#get-app-configuration)|0x06|
+|[SIGN PERSONAL MESSAGE](#sign-eth-personal-message)|0x08|
+|[PROVIDE ERC 20 TOKEN INFORMATION](#provide-erc-20-token-information)|0x0A|
+|[SIGN EIP 712 MESSAGE](#sign-eth-eip-712)|0x0C|
+|[GET ETH2 PUBLIC KEY](#get-eth2-public-key)|0x0E|
+|[SET ETH2 WITHDRAWAL INDEX](#set-eth2-withdrawal-index)|0x10|
+|[SET EXTERNAL PLUGIN](#set-external-plugin)|0x12|
+|[PROVIDE NFT INFORMATION](#provide-nft-information)|0x14|
+|[SET PLUGIN](#set-plugin)|0x16|
+
+<br/>
+<br/>
+
+## GET
+
+### GET APP CONFIGURATION
+<details>
+
+<summary>Description </summary>
+
+This command returns specific application configuration
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|06|00|00|00|04|
+
+:inbox_tray: input data
+
+None
+
+:outbox_tray: output data
+
+|Description|Length|
+|-----------|------|
+|0x01 : arbitrary data signature enabled by user<br/>0x02 : ERC 20 Token information needs to be provided externally|1|
+|Application major version|1|
+|Application minor version|1|
+|Application patch version|1|
+</details>
+
+<br/>
+
+### GET ETH PUBLIC ADDRESS
+
+<details>
+
+<summary>Description </summary>
+
+This command returns the public key and Ethereum address for the given BIP 32 path.  
+The address can be optionally checked on the device before being returned.  
+
+Usefull link:
+- [HD Wallet by ledger](https://www.ledger.com/academy/crypto/what-are-hierarchical-deterministic-hd-wallets)
+- [BIP-044](https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki)
+
+|CLA|INS|P1                                               |P2                              |Lc        |Le        |
+|---|---|-------------------------------------------------|--------------------------------|----------|----------|
+|E0 |02 |00 : return address                              |00: do not return the chain code| variable | variable |
+|   |   |01 : display address and confirm before returning|01 : return the chain code|     |          |          |
+
+:inbox_tray: input data
+
+|Description|Length|
+|-----------|------|
+|Number of BIP 32 derivations to perform (max 10)| 1|
+|First derivation index (big endian)| 4|
+| ... | 4|
+| Last derivation index (big endian) | 4|
+
+:outbox_tray: output data
+
+|Description|Length|
+|-----------|------|
+|Public Key length|1|
+|Uncompressed address length|var|
+|Ethereum address length|1|
+|Ethereum address|var|
+|Chain code if requested|32|
+
+Exemple:  
+With path `"44'/60'/1'/0/0"`  
+
+CLA: E0  
+INS: 02  
+P1  : 00  
+P2  : 00  
+Lc  : 11  (17 in hex)  
+Le  :
+  - 04  (number BIP 32 derivations)
+  - 80 00 00 2c
+  - 80 00 00 3C
+  - 00 00 00 00
+  - 00 00 00 00  
+
+|CLA|INS|P1|P2|Lc|Le - BIP number|First derivation|Second derivation|Third derivation|Fourth derivation|
+|-|-|-|-|-|-|-|-|-|-|
+|  |  |  |  |  |  |`44'`   |`60'`   |`0`     |`0`     |
+|E0|02|00|00|11|04|8000002C|8000003C|00000000|00000000|
+
+-> E0 02 00 00 11 04 8000002C 8000003C 00000000 00000000
+
+</details>
+
+<br/>
+
+### GET ETH2 PUBLIC KEY
+
+<details>
+
+<summary>Description </summary>
+
+This command returns an Ethereum 2 BLS12-381 public key derived following EIP 2333 specification (https://eips.ethereum.org/EIPS/eip-2333)
+
+This command has been supported since firmware version 1.6.0
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|0E|00 : return public key|00|variable|variable|
+|||01 : display public key and confirm before returning||||
+|||||||
+
+:inbox_tray: input data
+
+|Description|Length|
+|-----------|------|
+|Number of BIP 32 derivations to perform (max 10)|1|
+|First derivation index (big endian)|4|
+|...|4|
+|Last derivation index (big endian)|4|
+
+:outbox_tray: output data
+
+|Description|Length|
+|-----------|------|
+|Public key|48|
+</details>
+
+
+<br/>
+<br/>
+<br/>
+
+## SIGN
+
+### SIGN ETH TRANSACTION
+
+<details>
+
+<summary>Description </summary>
+
+This command signs an Ethereum transaction after having the user validate the following parameters
+
+  - Gas price 
+  - Gas limit
+  - Recipient address
+  - Value
+
+The input data is the RLP encoded transaction, without v/r/s present, streamed to the device in 255 bytes maximum data chunks.
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|04|00 : first transaction data block|00|variable|variable|
+|||80 : subsequent transaction data block||||
+|||||||
+
+:inbox_tray: input data (first transaction data block)
+
+|Description|Length|
+|-----------|------|
+|Number of BIP 32 derivations to perform (max 10)|1|
+|First derivation index (big endian)|4|
+|...|4|
+|Last derivation index (big endian)|4|
+|RLP transaction chunk|variable|
+
+:inbox_tray: input data  (other transaction data block)
+
+|Description|Length|
+|-----------|------|
+|RLP transaction chunk|variable|
+
+:outbox_tray: output data
+
+|Description|Length|
+|-----------|------|
+|v|1|
+|r|32|
+|s|32|
+
+</details>
+
+<br/>
+
+### SIGN ETH PERSONAL MESSAGE
+
+<details>
+
+<summary>Description </summary>
+
+This command signs an Ethereum message following the personal_sign specification (https://github.com/ethereum/go-ethereum/pull/2940) after having the user validate the SHA-256 hash of the message being signed. 
+
+This command has been supported since firmware version 1.0.8
+
+The input data is the message to sign, streamed to the device in 255 bytes maximum data chunks
+
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|08|00 : first message data block|00|variable|variable|
+|||80 : subsequent message data block||||
+|||||||
+
+:inbox_tray: input data (first message data block)
+
+|Description|Length|
+|-----------|------|
+|Number of BIP 32 derivations to perform (max 10)|1|
+|First derivation index (big endian)|4|
+|...|4|
+|Last derivation index (big endian)|4|
+|Message length|4|
+|Message chunk|variable|
+
+:inbox_tray: input data (other transaction data block)
+
+|Description|Length|
+|-----------|------|
+|Message chunk|variable|
+
+:outbox_tray: output data
+
+|Description|Length|
+|-----------|------|
+|v|1|
+|r|32|
+|s|32|
+
+</details>
+
+<br/>
+
+### SIGN ETH EIP 712
+
+<details>
+
+<summary>Description </summary>
+
+This command signs an Ethereum message following the EIP 712 specification (https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md)
+
+For implementation version 0, the domain hash and message hash are provided to the device, which displays them and returns the signature
+
+This command has been supported since firmware version 1.5.0
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|0C|00|implementation version: 00|variable|variable|
+
+:inbox_tray: input data
+
+|Description|Length|
+|-----------|------|
+|Number of BIP 32 derivations to perform (max 10)|1|
+|First derivation index (big endian)|4|
+|...|4|
+|Last derivation index (big endian)|4|
+|Domain hash|32|
+|Message hash|32|
+
+:outbox_tray: output data
+
+|Description|Length|
+|-----------|------|
+|v|1|
+|r|32|
+|s|32|
+
+</details>
+
+<br/>
+<br/>
+<br/>
+
+## SET
+
+### SET EXTERNAL PLUGIN
+
+<details>
+
+<summary>Description </summary>
+
+This commands provides the name of a trusted binding of a plugin with a contract address and a supported method selector. This plugin will be called to interpret contract data in the following transaction signing command.
+
+It shall be run immediately before performing a transaction involving a contract supported by this plugin to display the proper information to the user if necessary.
+
+The function returns an error sw (0x6984) if the plugin requested is not installed on the device, 0x9000 otherwise.
+
+The signature is computed on
+
+len(pluginName) || pluginName || contractAddress || methodSelector
+
+signed by the following secp256k1 public key 0482bbf2f34f367b2e5bc21847b6566f21f0976b22d3388a9a5e446ac62d25cf725b62a2555b2dd464a4da0ab2f4d506820543af1d242470b1b1a969a27578f353
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|12|00|00|variable|00|
+
+:inbox_tray: input data
+
+|Description|Length|
+|-----------|------|
+|Length of plugin name|1|
+|plugin name|variable|
+|contract address|20|
+|method selector|4|
+|signature|variable|
+
+:outbox_tray: output data
+
+None
+
+</details>
+
+<br/>
+
+### SET PLUGIN
+
+<details>
+
+<summary>Description </summary>
+
+This commands provides the name of a trusted binding of a plugin with a contract address and a supported method selector. This plugin will be called to interpret contract data in the following transaction signing command.
+
+It can be used to set both internal and external plugins.
+
+It shall be run immediately before performing a transaction involving a contract supported by this plugin to display the proper information to the user if necessary.
+
+The function returns an error sw (0x6984) if the plugin requested is not installed on the device, 0x9000 otherwise.
+
+The plugin names `ERC20`, `ERC721` and `ERC1155` are reserved. Additional plugin names might be added to this list in the future.
+
+The signature is computed on
+
+type || version || len(pluginName) || pluginName || address || selector || chainId || keyId || algorithmId || len(signature) || signature
+
+
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|16|00|00|variable|00|
+
+:inbox_tray: input data
+
+|Description|Length|
+|-----------|------|
+|Type|1|
+|Version|1|
+|Plugin Name Length|1|
+|Plugin Name|variable|
+|Address|20|
+|Selector|4|
+|Chain ID|8|
+|KeyID|1|
+|Algorithm|1|
+|Signature Length|1|
+|Signature|variable|
+
+:outbox_tray: output data
+
+None
+
+</details>
+
+<br/>
+
+### SET ETH2 WITHDRAWAL INDEX
+
+<details>
+
+<summary>Description </summary>
+
+This command sets the index of the Withdrawal key used as withdrawal credentials in an ETH2 deposit contract call signature. The path of the Withdrawal key is defined as m/12381/3600/index/0 according to EIP 2334 (https://eips.ethereum.org/EIPS/eip-2334)
+
+The default index used is 0 if this method isn’t called before the deposit contract transaction is sent to the device to be signed
+
+This command has been supported since firmware version 1.5.0
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|10|00|00|variable|variable|
+
+:inbox_tray: input data
+
+|Description|Length|
+|-----------|------|
+|Withdrawal key index (big endian)|4|
+
+:outbox_tray: output data
+
+None
+
+</details>
+
+<br/>
+<br/>
+<br/>
+
+## Provide
+
+### PROVIDE ERC 20 TOKEN INFORMATION
+
+<details>
+
+<summary>Description </summary>
+
+This commands provides a trusted description of an ERC 20 token to associate a contract address with a ticker and number of decimals.
+
+It shall be run immediately before performing a transaction involving a contract calling this contract address to display the proper token information to the user if necessary, as marked in GET APP CONFIGURATION flags.
+
+The signature is computed on
+
+ticker || address || number of decimals (uint4be) || chainId (uint4be)
+
+signed by the following secp256k1 public key 0482bbf2f34f367b2e5bc21847b6566f21f0976b22d3388a9a5e446ac62d25cf725b62a2555b2dd4This command returns an Ethereum 2 BLS12-381 public key derived following EIP 2333 specification (https://eips.ethereum.org/EIPS/eip-2333)
+
+This command has been supported since firmware version 1.6.064a4da0ab2f4d506820543af1d242470b1b1a969a27578f353
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|0A|00|00|variable|00|
+
+:inbox_tray: input data
+
+|Description|Length|
+|-----------|------|
+|Length of ERC 20 ticker|1|
+|ERC 20 ticker|variable|
+|ERC 20 contract address|20|
+|Number of decimals (big endian encoded)|4|
+|Chain ID (big endian encoded)|4|
+|Token information signature|variable|
+
+:outbox_tray: output data
+
+none
+
+</details>
+
+<br/>
+
+### PROVIDE NFT INFORMATION
+
+<details>
+
+<summary>Description </summary>
+
+This commands provides a trusted description of an NFT to associate a contract address with a collectionName.
+
+It shall be run immediately before performing a transaction involving a contract calling this contract address to display the proper nft information to the user if necessary, as marked in GET APP CONFIGURATION flags.
+
+The signature is computed on:
+
+type || version || len(collectionName) || collectionName || address || chainId || keyId || algorithmId
+
+|CLA|INS|P1|P2|Lc|Le|
+|---|---|--|--|--|--|
+|E0|14|00|00|variable|00|
+
+:inbox_tray: input data
+
+|Description|Length|
+|-----------|------|
+|Type|1|
+|Version|1|
+|Collection Name Length|1|
+|Collection Name|variable|
+|Address|20|
+|Chain ID|8|
+|KeyID|1|
+|Algorithm ID|1|
+|Signature Length|1|
+|Signature|variable|
+
+:outbox_tray: output data
+
+None
+
+</details>
+
+<br/>
+<br/>
+<br/>
+
+[//]: # (## Command name)
+[//]: # ()
+[//]: # (<details>)
+[//]: # ()
+[//]: # (<summary>Description </summary>)
+[//]: # ()
+[//]: # ()
+[//]: # (|CLA|INS|P1|P2|Lc|Le|)
+[//]: # (|---|---|--|--|--|--|)
+[//]: # (|||||||)
+[//]: # (|||||||)
+[//]: # (|||||||)
+[//]: # ()
+[//]: # (:inbox_tray: input data)
+[//]: # ()
+[//]: # (|Description|Length|)
+[//]: # (|-----------|------|)
+[//]: # (|||)
+[//]: # (|||)
+[//]: # (|||)
+[//]: # ()
+[//]: # (:outbox_tray: output data)
+[//]: # ()
+[//]: # (|Description|Length|)
+[//]: # (|-----------|------|)
+[//]: # (|||)
+[//]: # (|||)
+[//]: # (|||)
+[//]: # ()
+[//]: # (</details>)
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