Using this library you can easily create and sign transactions for Waves blockchain. It also allows you to multi-sign existing transactions.
Check full documentation on GitHub Pages.
Transaction creation is really simple:
const seed = '19875c31fa594035bd9a2473c2c33d3ff468c0f4befd4beeb981b8c1ea6def4a'
const signedTranserTx = transfer(seed, { amount: 1, recipient: '3P6fVra21KmTfWHBdib45iYV6aFduh4WwC2' })
In return you have signed transfer transaction:
{
id: '8NrUwgKRCMFbUbqXKQAHkGnspmWHEjKUSi5opEC6Havq',
type: 4,
version: 2,
recipient: '3P6fVra21KmTfWHBdib45iYV6aFduh4WwC2',
attachment: undefined,
feeAssetId: undefined,
assetId: undefined,
amount: 1,
fee: 100000,
senderPublicKey: '6nR7CXVV7Zmt9ew11BsNzSvVmuyM5PF6VPbWHW9BHgPq',
timestamp: 1536917842558,
proofs: [
'25kyX6HGjS3rkPTJRj5NVH6LLuZe6SzCzFtoJ8GDkojY9U5oPfVrnwBgrCHXZicfsmLthPUjTrfT9TQL2ciYrPGE'
]
}
Now you are able to POST it to Waves API or store for future purpose or you can add another signature from other party:
const otherPartySeed = '18f6edd4c8d647b4ba5ed366093ef5b8d0c4d8b3a6154a2b876f54773a678781'
const transferSidnedWithTwoParties = transfer(seed, signedTranserTx /*Tx from first example*/)
So now there are two proofs:
{
id: '8NrUwgKRCMFbUbqXKQAHkGnspmWHEjKUSi5opEC6Havq',
type: 4,
version: 2,
recipient: '3P6fVra21KmTfWHBdib45iYV6aFduh4WwC2',
attachment: undefined,
feeAssetId: undefined,
assetId: undefined,
amount: 1,
fee: 100000,
senderPublicKey: '6nR7CXVV7Zmt9ew11BsNzSvVmuyM5PF6VPbWHW9BHgPq',
timestamp: 1536917842558,
proofs: [
'25kyX6HGjS3rkPTJRj5NVH6LLuZe6SzCzFtoJ8GDkojY9U5oPfVrnwBgrCHXZicfsmLthPUjTrfT9TQL2ciYrPGE',
'CM9emPzpe6Ram7ZxcYax6s7Hkw6698wXCMPSckveFAS2Yh9vqJpy1X9nL7p4RKgU3UEa8c9RGXfUK6mFFq4dL9z'
]
}