trezor-firmware/core/src/apps/stellar/consts.py

from micropython import const

from trezor.enums import MessageType

TX_TYPE = bytearray("\x00\x00\x00\x02")

# source: https://github.com/stellar/go/blob/3d2c1defe73dbfed00146ebe0e8d7e07ce4bb1b6/xdr/Stellar-transaction.x#L16
# Inflation not supported see https://github.com/trezor/trezor-core/issues/202#issuecomment-393342089
op_codes = {
    MessageType.StellarAccountMergeOp: 8,
    MessageType.StellarAllowTrustOp: 7,
    MessageType.StellarBumpSequenceOp: 11,
    MessageType.StellarChangeTrustOp: 6,
    MessageType.StellarCreateAccountOp: 0,
    MessageType.StellarCreatePassiveOfferOp: 4,
    MessageType.StellarManageDataOp: 10,
    MessageType.StellarManageOfferOp: 3,
    MessageType.StellarPathPaymentOp: 2,
    MessageType.StellarPaymentOp: 1,
    MessageType.StellarSetOptionsOp: 5,
}

op_wire_types = [
    MessageType.StellarAccountMergeOp,
    MessageType.StellarAllowTrustOp,
    MessageType.StellarBumpSequenceOp,
    MessageType.StellarChangeTrustOp,
    MessageType.StellarCreateAccountOp,
    MessageType.StellarCreatePassiveOfferOp,
    MessageType.StellarManageDataOp,
    MessageType.StellarManageOfferOp,
    MessageType.StellarPathPaymentOp,
    MessageType.StellarPaymentOp,
    MessageType.StellarSetOptionsOp,
]

# https://github.com/stellar/go/blob/e0ffe19f58879d3c31e2976b97a5bf10e13a337b/xdr/xdr_generated.go#L584
ASSET_TYPE_NATIVE = const(0)
ASSET_TYPE_ALPHANUM4 = const(1)
ASSET_TYPE_ALPHANUM12 = const(2)

# https://www.stellar.org/developers/guides/concepts/accounts.html#balance
# https://github.com/stellar/go/blob/3d2c1defe73dbfed00146ebe0e8d7e07ce4bb1b6/amount/main.go#L23
AMOUNT_DECIMALS = const(7)

# https://github.com/stellar/go/blob/master/network/main.go
NETWORK_PASSPHRASE_PUBLIC = "Public Global Stellar Network ; September 2015"
NETWORK_PASSPHRASE_TESTNET = "Test SDF Network ; September 2015"

# https://www.stellar.org/developers/guides/concepts/accounts.html#flags
FLAG_AUTH_REQUIRED = const(1)
FLAG_AUTH_REVOCABLE = const(2)
FLAG_AUTH_IMMUTABLE = const(4)
FLAGS_MAX_SIZE = const(7)

# https://github.com/stellar/go/blob/e0ffe19f58879d3c31e2976b97a5bf10e13a337b/xdr/Stellar-transaction.x#L275
MEMO_TYPE_NONE = const(0)
MEMO_TYPE_TEXT = const(1)
MEMO_TYPE_ID = const(2)
MEMO_TYPE_HASH = const(3)
MEMO_TYPE_RETURN = const(4)

# https://github.com/stellar/go/blob/3d2c1defe73dbfed00146ebe0e8d7e07ce4bb1b6/xdr/xdr_generated.go#L156
SIGN_TYPE_ACCOUNT = const(0)
SIGN_TYPE_PRE_AUTH = const(1)
SIGN_TYPE_HASH = const(2)

SIGN_TYPES = (SIGN_TYPE_ACCOUNT, SIGN_TYPE_HASH, SIGN_TYPE_PRE_AUTH)


def get_op_code(msg) -> int:
    wire = msg.MESSAGE_WIRE_TYPE
    if wire not in op_codes:
        raise ValueError("Stellar: op code unknown")
    return op_codes[wire]