import { createWalletFromMnemonic } from '@tendermint/sig';

const mnemonic = 'trouble salon husband push melody usage fine ensure blade deal miss twin';

const wallet = createWalletFromMnemonic(mnemonic); // BIP39 mnemonic string
/*
{
    address:    'cosmos1asm039pzjkkg9ghlvj267p5g3whtxd2t4leg5c',
    privateKey: Uint8Array [
        202,  60, 140, 106, 178, 180,  60,   1,
        186,  68, 206, 224, 207, 179,  79,  81,
        119,  98,  98,   1, 207, 170, 209, 161,
          1, 124, 151, 236, 205, 151,   3, 229
    ],
    publicKey:  Uint8Array [
          3, 159,  35,  41, 130,  48,   3, 247,
        139, 242, 113,  41, 200, 176,  73,  27,
        102, 232, 113, 226,  80, 184, 107, 144,
        217,  88, 151,  21,  22, 185,  68,  28,
        211
    ]
}
*/

import { createAddress } from '@tendermint/sig';

const address = createAddress(publicKey); // Buffer or Uint8Array
// 'cosmos1asm039pzjkkg9ghlvj267p5g3whtxd2t4leg5c'

import { signTx } from '@tendermint/sig';

const tx = {
    fee:  {
        amount: [{ amount: '0', denom: '' }],
        gas:    '10000'
    },
    memo: '',
    msg:  [{
        type:  'cosmos-sdk/MsgSend',
        value: {
            from_address: 'cosmos1qperwt9wrnkg5k9e5gzfgjppzpqhyav5j24d66',
            to_address:   'cosmos1yeckxz7tapz34kjwnjxvmxzurerquhtrmxmuxt',
            amount:       [{ amount: '1', denom: 'STAKE' }]
        }
    }]
};

const signMeta = {
    account_number: '1',
    chain_id:       'cosmos',
    sequence:       '0'
};

const stdTx = signTx(tx, signMeta, wallet); // Wallet or privateKey / publicKey pair; see example above
/*
{
    fee:        {
        amount: [{
            amount: '0',
            denom:  ''
        }],
        gas:    '10000'
    },
    memo:       '',
    msg:        [{
        type:  'cosmos-sdk/MsgSend',
        value: {
            from_address: 'cosmos1qperwt9wrnkg5k9e5gzfgjppzpqhyav5j24d66',
            to_address:   'cosmos1yeckxz7tapz34kjwnjxvmxzurerquhtrmxmuxt',
            amount:       [{
                amount: '1',
                denom:  'STAKE'
            }]
        }
    }],
    signatures: [{
        signature: 'GLhQW+t36tjJW83avsBz6e7WUpkJyeAsmkrCJsnk/fkfA4q5nIVVwTF5HPQhFdkhMfAVKPFuvDmigRp+VQCwtg==',
        pub_key:   {
            type:  'tendermint/PubKeySecp256k1',
            value: 'A58jKYIwA/eL8nEpyLBJG2boceJQuGuQ2ViXFRa5RBzT'
        }
    }]
}
*/

import { verifyTx } from '@tendermint/sig';

const valid = verifyTx(stdTx, signMeta); // signed transaction and metadata; see example above
// true