docs updated to new makeTransferTransaction format
This commit is contained in:
manolodewiner
tim
parent
9f385c440d
commit
6031868245
|
|
@ -14,7 +14,7 @@ First, we create an asset registering the bicycle:
|
|||
const txCreateAliceSimple = driver.Transaction.makeCreateTransaction(
|
||||
{'asset': 'bicycle'},
|
||||
{'purchase_price': '€240'},
|
||||
[
|
||||
[
|
||||
driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(alice.publicKey))
|
||||
],
|
||||
alice.publicKey
|
||||
|
|
@ -29,10 +29,10 @@ So, Alice needs a crypto conditions that defines that she or her daughter can si
|
|||
We need to define a threshold as well. This defines how many persons have to sign the transaction to ``TRANSFER`` it.
|
||||
In this case, we define two subconditions with the public keys from Alice and Carly. Next, we set the threshold to **one**.
|
||||
This means that just one of the subconditions has to sign the transaction to transfer it.
|
||||
This can be the mother Alice, or Carly herself.
|
||||
This can be the mother Alice, or Carly herself.
|
||||
|
||||
.. code-block:: js
|
||||
|
||||
|
||||
// Create condition for Alice and Carly
|
||||
let subConditionFrom = driver.Transaction.makeEd25519Condition(alice.publicKey, false)
|
||||
let subConditionTo = driver.Transaction.makeEd25519Condition(carly.publicKey, false)
|
||||
|
|
@ -47,11 +47,10 @@ This can be the mother Alice, or Carly herself.
|
|||
output.public_keys = [carly.publicKey]
|
||||
|
||||
let transaction = driver.Transaction.makeTransferTransaction(
|
||||
txCreateAliceSimpleSigned,
|
||||
{'meta': 'Transfer to new user with conditions'},
|
||||
[output],
|
||||
0
|
||||
);
|
||||
[{ tx: txCreateAliceSimpleSigned, output_index: 0 }],
|
||||
[output],
|
||||
{'meta': 'Transfer to new user with conditions'}
|
||||
);
|
||||
|
||||
// Add alice as previous owner
|
||||
transaction.inputs[0].owners_before = [alice.publicKey]
|
||||
|
|
|
|||
|
|
@ -36,11 +36,11 @@ A simple connection with BigchainDB can be established like this.
|
|||
const conn = new driver.Connection(API_PATH)
|
||||
|
||||
It is also possible to connect to a BigchainDB node of the IPDB test net.
|
||||
To do so, you need to pass the **app_id and app_key**.
|
||||
To do so, you need to pass the **app_id and app_key**.
|
||||
|
||||
.. code-block:: js
|
||||
.. code-block:: js
|
||||
|
||||
let bdb = new driver.Connection('https://test.ipdb.io/api/v1/', {
|
||||
let bdb = new driver.Connection('https://test.ipdb.io/api/v1/', {
|
||||
app_id: 'dgi829l9',
|
||||
app_key: 'u008ik1bf83b43ce3a95uu0727e66fb9'
|
||||
})
|
||||
|
|
@ -71,10 +71,10 @@ that represents a bicycle:
|
|||
}
|
||||
}
|
||||
|
||||
We'll suppose that the bike belongs to Alice, and that it eventually will be
|
||||
We'll suppose that the bike belongs to Alice, and that it eventually will be
|
||||
transferred to Bob.
|
||||
|
||||
In general, you are free to define any JSON object you which to store for the
|
||||
In general, you are free to define any JSON object you which to store for the
|
||||
``'data'`` property (assetdata).
|
||||
|
||||
Metadata Definition (*optional*)
|
||||
|
|
@ -91,11 +91,11 @@ For example, the bicycle will be transferred on earth which is metadata:
|
|||
Asset Creation
|
||||
--------------
|
||||
|
||||
We're now ready to create the digital asset. First, let's make a 'CREATE'
|
||||
We're now ready to create the digital asset. First, let's make a 'CREATE'
|
||||
transaction:
|
||||
|
||||
.. code-block:: js
|
||||
|
||||
|
||||
const txCreateAliceSimple = driver.Transaction.makeCreateTransaction(
|
||||
assetdata,
|
||||
metadata,
|
||||
|
|
@ -113,10 +113,10 @@ For `CREATE` Transactions, this should usually just be a list of
|
|||
Outputs wrapping Ed25519 Conditions generated from the issuers' public
|
||||
keys (so that the issuers are the recipients of the created asset).
|
||||
|
||||
``alice.publicKey`` can be considered as the Input for the transaction.
|
||||
Each input spends/transfers a previous output by satisfying/fulfilling
|
||||
the crypto-conditions on that output. A CREATE transaction should have
|
||||
exactly one input. A TRANSFER transaction should have at least one input (i.e. ≥1).
|
||||
``alice.publicKey`` can be considered as the Input for the transaction.
|
||||
Each input spends/transfers a previous output by satisfying/fulfilling
|
||||
the crypto-conditions on that output. A CREATE transaction should have
|
||||
exactly one input. A TRANSFER transaction should have at least one input (i.e. ≥1).
|
||||
|
||||
Sign the transaction with private key of Alice to fulfill it:
|
||||
|
||||
|
|
@ -142,7 +142,7 @@ To check the status of the transaction:
|
|||
|
||||
conn.getStatus(txCreateAliceSimpleSigned.id)
|
||||
|
||||
It is also possible to check the status every 0.5 seconds
|
||||
It is also possible to check the status every 0.5 seconds
|
||||
with use of the transaction ``id``:
|
||||
|
||||
.. code-block:: js
|
||||
|
|
@ -168,29 +168,28 @@ Alice could retrieve the transaction:
|
|||
|
||||
conn.getTransaction(txCreateAliceSimpleSigned.id)
|
||||
|
||||
First, let's prepare the transaction to be transferred.
|
||||
First, let's prepare the transaction to be transferred.
|
||||
|
||||
.. code-block:: js
|
||||
|
||||
const txTransferBob = driver.Transaction.makeTransferTransaction(
|
||||
// signedTx to transfer
|
||||
txCreateAliceSimpleSigned,
|
||||
// signedTx to transfer and output index
|
||||
[{ tx: txCreateAliceSimpleSigned, output_index: 0 }],
|
||||
|
||||
[driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(bob.publicKey))],
|
||||
|
||||
// metadata
|
||||
{price: '100 euro'},
|
||||
|
||||
[driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(bob.publicKey))],
|
||||
0
|
||||
{price: '100 euro'}
|
||||
);
|
||||
|
||||
The function ``makeTransferTransaction()`` needs following parameters:
|
||||
|
||||
- Unspent transaction: Previous transaction you have control over (i.e. can fulfill its Output Condition)
|
||||
- Metadata for transaction (e.g. price of sold bike)
|
||||
- Unspent outputs: Array of `unspent transactions outputs`. Each item contains `Transaction` itself and index of `unspent output` for that `Transaction`.
|
||||
- Array of output objects to add to the transaction: Think of these as the recipients of the asset after the transaction. For `TRANSFER` transactions, this should usually just be a list of outputs wrapping Ed25519 conditions generated from the public keys of the recipients.
|
||||
- Indices of the outputs in `unspent transaction` that this transaction fulfills.
|
||||
- Metadata for transaction (e.g. price of sold bike)
|
||||
|
||||
Fulfill transaction by signing it with Alice's private key.
|
||||
|
||||
Fulfill transaction by signing it with Alice's private key.
|
||||
|
||||
.. code-block:: js
|
||||
|
||||
|
|
@ -245,9 +244,9 @@ Let’s perform a text search for all assets that contain the word 'Bicycle Inc.
|
|||
conn.searchAssets('Bicycle Inc.')
|
||||
.then(assets => console.log('Found assets with serial number Bicycle Inc.:', assets))
|
||||
|
||||
Which leads to following result:
|
||||
Which leads to following result:
|
||||
|
||||
.. code-block:: js
|
||||
.. code-block:: js
|
||||
|
||||
[
|
||||
{
|
||||
|
|
@ -331,13 +330,13 @@ Recap: Asset Creation & Transfer
|
|||
// Transfer bicycle to Bob
|
||||
.then(() => {
|
||||
const txTransferBob = driver.Transaction.makeTransferTransaction(
|
||||
// signedTx to transfer
|
||||
txCreateAliceSimpleSigned,
|
||||
// signedTx to transfer and output index
|
||||
[{ tx: txCreateAliceSimpleSigned, output_index: 0 }],
|
||||
[driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(bob.publicKey))],
|
||||
// metadata
|
||||
{price: '100 euro'},
|
||||
[driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(bob.publicKey))],
|
||||
0)
|
||||
|
||||
{price: '100 euro'}
|
||||
)
|
||||
|
||||
// Sign with alice's private key
|
||||
let txTransferBobSigned = driver.Transaction.signTransaction(txTransferBob, alice.privateKey)
|
||||
console.log('Posting signed transaction: ', txTransferBobSigned)
|
||||
|
|
@ -356,13 +355,13 @@ Recap: Asset Creation & Transfer
|
|||
// Search for asset based on the serial number of the bicycle
|
||||
.then(() => conn.searchAssets('Bicycle Inc.'))
|
||||
.then(assets => console.log('Found assets with serial number Bicycle Inc.:', assets))
|
||||
|
||||
|
||||
Ed25519Keypair Seed Functionality
|
||||
|
||||
Ed25519Keypair Seed Functionality
|
||||
---------------------------------
|
||||
|
||||
BigchainDB JavaScript driver allows you to create a keypair based on a seed.
|
||||
The constructor accepts a 32 byte seed. One of the ways to create a seed from
|
||||
BigchainDB JavaScript driver allows you to create a keypair based on a seed.
|
||||
The constructor accepts a 32 byte seed. One of the ways to create a seed from
|
||||
a string (e.g. a passphrase) is the one used by ``bip39``, specifically the function ``mnemonicToSeed``.
|
||||
|
||||
Install bip39 with npm: ``npm install bip39``
|
||||
|
|
@ -490,7 +489,7 @@ Below piece of code can be opened in your web browser. It will connect to your w
|
|||
</div>
|
||||
|
||||
|
||||
Besides that, a NodeJs version has been created to display the validated transactions.
|
||||
Besides that, a NodeJs version has been created to display the validated transactions.
|
||||
All transactions are printed to the console. To use this piece of code, you will need the ``ws`` (WebSocket package) through npm: ``npm install --save ws``.
|
||||
|
||||
.. code-block:: js
|
||||
|
|
@ -514,13 +513,13 @@ All transactions are printed to the console. To use this piece of code, you will
|
|||
Difference unspent and spent output
|
||||
-----------------------------------
|
||||
An unspent output is simply an output of a transaction which isn't yet an input of another transaction.
|
||||
So, if we transfer an asset, the output becomes spent, because it becomes the input of the transfer transaction.
|
||||
So, if we transfer an asset, the output becomes spent, because it becomes the input of the transfer transaction.
|
||||
The transfer transactions its output becomes unspent now until he transfers the asset again to somebody else.
|
||||
|
||||
We will demonstrate this with a piece of code where we transfer a bicycle from Alice to Bob,
|
||||
We will demonstrate this with a piece of code where we transfer a bicycle from Alice to Bob,
|
||||
and further we transfer it from Bob to Chris. Expectations:
|
||||
|
||||
* Output for Alice is spent
|
||||
* Output for Alice is spent
|
||||
* Output for Bob is spent
|
||||
* Output for Chris is unspent (he is the last person in transaction chain)
|
||||
|
||||
|
|
@ -528,8 +527,8 @@ and further we transfer it from Bob to Chris. Expectations:
|
|||
|
||||
const driver = require('bigchaindb-driver')
|
||||
const API_PATH = 'http://localhost:9984/api/v1/'
|
||||
const conn = new driver.Connection(API_PATH)
|
||||
|
||||
const conn = new driver.Connection(API_PATH)
|
||||
|
||||
const alice = new driver.Ed25519Keypair()
|
||||
const bob = new driver.Ed25519Keypair()
|
||||
const chris = new driver.Ed25519Keypair()
|
||||
|
|
@ -571,11 +570,11 @@ and further we transfer it from Bob to Chris. Expectations:
|
|||
// Transfer bicycle from Alice to Bob
|
||||
.then(() => {
|
||||
const txTransferBob = driver.Transaction.makeTransferTransaction(
|
||||
txCreateAliceSimpleSigned,
|
||||
{'newOwner': 'Bob'},
|
||||
[driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(bob.publicKey))],
|
||||
0)
|
||||
|
||||
[{ tx: txCreateAliceSimpleSigned, output_index: 0 }],
|
||||
[driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(bob.publicKey))],
|
||||
{'newOwner': 'Bob'}
|
||||
)
|
||||
|
||||
// Sign with alice's private key
|
||||
txTransferBobSigned = driver.Transaction.signTransaction(txTransferBob, alice.privateKey)
|
||||
console.log('\n\nPosting signed transaction to Bob:\n', txTransferBobSigned)
|
||||
|
|
@ -588,11 +587,11 @@ and further we transfer it from Bob to Chris. Expectations:
|
|||
// Second transfer of bicycle from Bob to Chris
|
||||
.then(tx => {
|
||||
const txTransferChris = driver.Transaction.makeTransferTransaction(
|
||||
txTransferBobSigned,
|
||||
{'newOwner': 'Chris'},
|
||||
[driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(chris.publicKey))],
|
||||
0)
|
||||
|
||||
[{ tx: txTransferBobSigned, output_index: 0 }],
|
||||
[driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(chris.publicKey))],
|
||||
{'newOwner': 'Chris'}
|
||||
)
|
||||
|
||||
// Sign with bob's private key
|
||||
let txTransferChrisSigned = driver.Transaction.signTransaction(txTransferChris, bob.privateKey)
|
||||
console.log('\n\nPosting signed transaction to Chris:\n', txTransferChrisSigned)
|
||||
|
|
@ -627,7 +626,7 @@ and further we transfer it from Bob to Chris. Expectations:
|
|||
})
|
||||
.catch(res => {console.log(res)})
|
||||
|
||||
Output of above code looks like this. As you can see, Chris has no spent output, but one unspent output.
|
||||
Output of above code looks like this. As you can see, Chris has no spent output, but one unspent output.
|
||||
|
||||
.. code-block:: js
|
||||
|
||||
|
|
@ -654,7 +653,7 @@ Let's assume we have created a token to pay each other for small transactions li
|
|||
}
|
||||
|
||||
Let's create the asset. Note that we give an extra parameter to the ``makeOutput()`` function.
|
||||
We give it the parameter ``'4'`` to indicate that we want to create 4 tokens.
|
||||
We give it the parameter ``'4'`` to indicate that we want to create 4 tokens.
|
||||
**Pay attention to give the function a String instead of a plain Number.**
|
||||
|
||||
.. code-block:: js
|
||||
|
|
@ -676,35 +675,36 @@ This gives us 4 tokens to transfer.
|
|||
.. code-block:: js
|
||||
|
||||
const txTransferDivisible = driver.Transaction.makeTransferTransaction(
|
||||
txCreateAliceDivisibleSigned,
|
||||
{
|
||||
metaDataMessage: 'I am specific to this transfer transaction'
|
||||
},
|
||||
[{ tx: txCreateAliceDivisibleSigned, output_index: 0 }],
|
||||
[
|
||||
driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(carly.publicKey), '2'),
|
||||
driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(bob.publicKey), '1'),
|
||||
driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(alice.publicKey), '1')
|
||||
], 0);
|
||||
],
|
||||
{
|
||||
metaDataMessage: 'I am specific to this transfer transaction'
|
||||
}
|
||||
);
|
||||
|
||||
To make the use of the last parameter of ``makeTransferTransaction()`` function more clear, we will do another transfer.
|
||||
We will fulfill the first and second output of the create transaction (0, 1) because Carly and Bob decide to redistribute some money.
|
||||
|
||||
* Output 0 represents 2 tokens for Carly
|
||||
* Output 1 represents 1 token for Bob
|
||||
* Output 1 represents 1 token for Bob
|
||||
|
||||
This gives us 3 tokens to redistribute. I want to give 1 token to Carly and 2 tokens Alice.
|
||||
|
||||
.. code-block:: js
|
||||
|
||||
const txTransferDivisibleInputs = driver.Transaction.makeTransferTransaction(
|
||||
txTransferDivisibleSigned,
|
||||
{
|
||||
metaDataMessage: 'I am specific to this transfer transaction'
|
||||
},
|
||||
[{ tx: txTransferDivisibleSigned, output_index: 0 }, { tx: txTransferDivisibleSigned, output_index: 1 }],
|
||||
[
|
||||
driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(carly.publicKey), '1'),
|
||||
driver.Transaction.makeOutput(driver.Transaction.makeEd25519Condition(alice.publicKey), '2')
|
||||
], 0, 1)
|
||||
],
|
||||
{
|
||||
metaDataMessage: 'I am specific to this transfer transaction'
|
||||
}
|
||||
);
|
||||
|
||||
Because we want to fulfill two outputs (Carly and Bob), we have to sign the transfer transaction in the same order:
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue