General structure
The general structure of commands and responses is as follows:
Commands
| Field | Type | Content | Note |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | |
| P1 | byte (1) | Parameter 1 | |
| P2 | byte (1) | Parameter 2 | |
| L | byte (1) | Bytes in payload | |
| PAYLOAD | byte (L) | Payload | |
Response
| Field | Type | Content | Note |
|---|
| ANSWER | byte (?) | Answer | depends on the command |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
Return codes
| Return code | Description |
|---|
| 0x6400 | Execution Error |
| 0x6700 | Wrong buffer length |
| 0x6982 | Empty buffer |
| 0x6983 | Output buffer too small |
| 0x6984 | Data is invalid |
| 0x6985 | Conditions not satisfied |
| 0x6986 | Command not allowed |
| 0x6987 | Tx is not initialized |
| 0x6A80 | Bad key handle |
| 0x6B00 | P1/P2 are invalid |
| 0x6D00 | INS not supported |
| 0x6E00 | CLA not supported |
| 0x6F00 | Unknown |
| 0x6F01 | Sign / verify error |
| 0x9000 | Success |
| 0x9001 | Busy |
Command definition
GET_VERSION
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x00 |
| P1 | byte (1) | Parameter 1 | ignored |
| P2 | byte (1) | Parameter 2 | ignored |
| L | byte (1) | Bytes in payload | 0 |
Response
| Field | Type | Content | Note |
|---|
| TEST | byte (1) | Test Mode | 0xFF means test mode is enabled |
| MAJOR | byte (1) | Version Major | |
| MINOR | byte (1) | Version Minor | |
| PATCH | byte (1) | Version Patch | |
| LOCKED | byte (1) | Device is locked | |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_GET_ADDR
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x01 |
| P1 | byte (1) | Request User confirmation | No = 0 |
| P2 | byte (1) | Parameter 2 | ignored |
| L | byte (1) | Bytes in payload | (depends) |
| Path[0] | byte (4) | Derivation Path Data | 0x80000000 |
| Path[1] | byte (4) | Derivation Path Data | 0x80000000 |
| Path[2] | byte (4) | Derivation Path Data | ? |
| Path[3] | byte (4) | Derivation Path Data | ? |
| Path[4] | byte (4) | Derivation Path Data | ? |
Response
| Field | Type | Content | Note |
|---|
| PK | byte (65) | Public Key | |
| ADDR_B_LEN | byte (1) | ADDR_B Length | |
| ADDR_B | byte (??) | Address as Bytes | |
| ADDR_S_LEN | byte (1) | ADDR_S Len | |
| ADDR_S | byte (??) | Address as String | |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_SIGN
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x02 |
| P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
| P2 | byte (1) | ---- | is_stake_tx |
| L | byte (1) | Bytes in payload | (depends) |
The first packet/chunk includes only the derivation path
If the transaction blob is from a Neuron-stake transaction, it expects P2 == 1.
Otherwise P2 needs to be 0.
All other packets/chunks contain data chunks that are described below
First Packet
| Field | Type | Content | Expected |
|---|
| Path[0] | byte (4) | Derivation Path Data | 44 |
| Path[1] | byte (4) | Derivation Path Data | 461 |
| Path[2] | byte (4) | Derivation Path Data | ? |
| Path[3] | byte (4) | Derivation Path Data | ? |
| Path[4] | byte (4) | Derivation Path Data | ? |
Other Chunks/Packets
| Field | Type | Content | Expected |
|---|
| Data | bytes... | Message | |
Data is defined as:
| Field | Type | Content | Expected |
|---|
| Message | bytes.. | CBOR data to sign | |
Response
| Field | Type | Content | Note |
|---|
| secp256k1 R | byte (32) | Signature | |
| secp256k1 S | byte (32) | Signature | |
| secp256k1 V | byte (1) | Signature | |
| SIG | byte (variable) | Signature | DER format |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_SIGN_COMBINED
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x03 |
| P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
| P2 | byte (1) | ---- | is_stake_tx |
| L | byte (1) | Bytes in payload | (depends) |
The first packet/chunk includes only the derivation path
If the transaction blob is from a Neuron-stake transaction, it expects P2 == 1.
Otherwise P2 needs to be 0.
All other packets/chunks contain data chunks that are described below
First Packet
| Field | Type | Content | Expected |
|---|
| Path[0] | byte (4) | Derivation Path Data | 44 |
| Path[1] | byte (4) | Derivation Path Data | 461 |
| Path[2] | byte (4) | Derivation Path Data | ? |
| Path[3] | byte (4) | Derivation Path Data | ? |
| Path[4] | byte (4) | Derivation Path Data | ? |
Other Chunks/Packets
| Field | Type | Content | Expected |
|---|
| Data | bytes... | Combined Message | |
Data is defined as:
| Field | Type | Content | Expected |
|---|
| State Read Length | byte (4) | Length of state read data | |
| State Read Data | bytes.. | State read CBOR data | |
| Request Length | byte (4) | Length of request data | |
| Request Data | bytes.. | Request CBOR data | |
Response
| Field | Type | Content | Note |
|---|
| Request Hash | byte (32) | Hash of request data | |
| Request Signature | byte (64) | Signature request hash | |
| State Read Hash | byte (32) | Hash of state read data | |
| State Read Signature | byte (64) | Signature state read | |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_CONSENT_REQUEST
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x04 |
| P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
| P2 | byte (1) | ---- | ignored |
| L | byte (1) | Bytes in payload | (depends) |
The first packet/chunk includes only the derivation path
First Packet
| Field | Type | Content | Expected |
|---|
| Path[0] | byte (4) | Derivation Path Data | 44 |
| Path[1] | byte (4) | Derivation Path Data | 461 |
| Path[2] | byte (4) | Derivation Path Data | ? |
| Path[3] | byte (4) | Derivation Path Data | ? |
| Path[4] | byte (4) | Derivation Path Data | ? |
Other Chunks/Packets
| Field | Type | Content | Expected |
|---|
| Data | bytes... | Consent Request | |
Response
| Field | Type | Content | Note |
|---|
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_CANISTER_CALL_TX
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x05 |
| P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
| P2 | byte (1) | ---- | ignored |
| L | byte (1) | Bytes in payload | (depends) |
The first packet/chunk includes only the derivation path
First Packet
| Field | Type | Content | Expected |
|---|
| Path[0] | byte (4) | Derivation Path Data | 44 |
| Path[1] | byte (4) | Derivation Path Data | 461 |
| Path[2] | byte (4) | Derivation Path Data | ? |
| Path[3] | byte (4) | Derivation Path Data | ? |
| Path[4] | byte (4) | Derivation Path Data | ? |
Other Chunks/Packets
| Field | Type | Content | Expected |
|---|
| Data | bytes... | Canister Call | |
Response
| Field | Type | Content | Note |
|---|
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_CERTIFICATE_AND_SIGN
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x06 |
| P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
| P2 | byte (1) | ---- | ignored |
| L | byte (1) | Bytes in payload | (depends) |
The first packet/chunk includes only the derivation path
First Packet
| Field | Type | Content | Expected |
|---|
| Path[0] | byte (4) | Derivation Path Data | 44 |
| Path[1] | byte (4) | Derivation Path Data | 461 |
| Path[2] | byte (4) | Derivation Path Data | ? |
| Path[3] | byte (4) | Derivation Path Data | ? |
| Path[4] | byte (4) | Derivation Path Data | ? |
Other Chunks/Packets
| Field | Type | Content | Expected |
|---|
| Data | bytes... | Certificate Data | |
Response
| Field | Type | Content | Note |
|---|
| secp256k1 R | byte (32) | Signature | |
| secp256k1 S | byte (32) | Signature | |
| secp256k1 V | byte (1) | Signature | |
| SIG | byte (variable) | Signature | DER format |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_SUPPORTED_TOKENS_LEN
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x07 |
| P1 | byte (1) | Parameter 1 | ignored |
| P2 | byte (1) | Parameter 2 | ignored |
| L | byte (1) | Bytes in payload | 0 |
Response
| Field | Type | Content | Note |
|---|
| LEN | byte (1) | Number of tokens | Number of supported tokens in registry |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_TOKEN_AT_IDX
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0x11 |
| INS | byte (1) | Instruction ID | 0x08 |
| P1 | byte (1) | Token Index | 0-255 |
| P2 | byte (1) | Parameter 2 | ignored |
| L | byte (1) | Bytes in payload | 0 |
Response
| Field | Type | Content | Note |
|---|
| TOKEN_INFO | byte (?) | Token Information | See TokenInfo structure |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
TokenInfo Structure
The token information is returned as an array of the following structure:
| Field | Type | Content |
|---|
| TOKEN_SYMBOL | byte (?) | Token symbol string |
| TOKEN_NAME | byte (?) | Token name string |
| DECIMALS | byte (1) | Number of decimals |
The array length is determined by the number of supported tokens, which can be obtained using the INS_SUPPORTED_TOKENS_LEN command.
