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token-launch 80 char rule

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This commit is contained in:
manolodewiner 2017-12-18 11:25:40 +01:00
parent d219c0d04a
commit 6e452aae79
1 changed files with 24 additions and 14 deletions
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38
_src/_guides/tutorial-token-launch.md
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@ -46,14 +46,16 @@ function tokenLaunch() {
datetime: new Date().toString() datetime: new Date().toString()
}, },
// Output. Divisible asset, include nTokens as parameter // Output. Divisible asset, include nTokens as parameter
[BigchainDB.Transaction.makeOutput(BigchainDB.Transaction.makeEd25519Condition(tokenCreator.publicKey), nTokens.toString())], [BigchainDB.Transaction.makeOutput(BigchainDB.Transaction
.makeEd25519Condition(tokenCreator.publicKey), nTokens.toString())],
tokenCreator.publicKey tokenCreator.publicKey
) )
// Sign the transaction with private key of the creator. Will be the owner of the asset // Sign the transaction with the private key of the token creator
const txSigned = BigchainDB.Transaction.signTransaction(tx, tokenCreator.privateKey) const txSigned = BigchainDB.Transaction
.signTransaction(tx, tokenCreator.privateKey)
// Send the transaction to BigchainDB // Send the transaction off to BigchainDB
conn.postTransaction(txSigned) conn.postTransaction(txSigned)
.then(() => conn.pollStatusAndFetchTransaction(txSigned.id)) .then(() => conn.pollStatusAndFetchTransaction(txSigned.id))
.then(res => { .then(res => {
@ -77,44 +79,52 @@ Tokens can be transferred to an unlimited number of participants. In this exampl
const amountToSend = 200 const amountToSend = 200
function transferTokens() { function transferTokens() {
// Receiver of some tokens // User who will receive of part of the tokens
const newUser = new BigchainDB.Ed25519Keypair() const newUser = new BigchainDB.Ed25519Keypair()
// Get outputs of the transactions belonging the token creator. false argument to retrieve not spent outputs // Get outputs of the transactions belonging the token creator.
// false argument to retrieve not spent outputs
conn.listOutputs(tokenCreator.publicKey, 'false') conn.listOutputs(tokenCreator.publicKey, 'false')
.then((txs) => { .then((txs) => {
// Just one transaction with outputs not being spent by tokenCreator.
// So txs[0]
return conn.getTransaction(txs[0].transaction_id) return conn.getTransaction(txs[0].transaction_id)
}) })
// Just one transaction with outputs not being spent by tokenCreator. So txs[0]
.then((tx) => { .then((tx) => {
// Create transfer transaction // Create transfer transaction
const createTranfer = BigchainDB.Transaction.makeTransferTransaction( const createTranfer = BigchainDB.Transaction.makeTransferTransaction
(
tx, tx,
// Metadata (optional) // Metadata (optional)
{ {
tranferTo: 'john', tranferTo: 'john',
tokensLeft: tokensLeft tokensLeft: tokensLeft
}, },
// Output. Two outputs // Output. Two outputs. The hole input must be spent
[BigchainDB.Transaction.makeOutput( [BigchainDB.Transaction.makeOutput(
BigchainDB.Transaction.makeEd25519Condition(tokenCreator.publicKey), (tokensLeft - amountToSend).toString()), BigchainDB.Transaction
.makeEd25519Condition(tokenCreator.publicKey),
(tokensLeft - amountToSend).toString()),
BigchainDB.Transaction.makeOutput( BigchainDB.Transaction.makeOutput(
BigchainDB.Transaction.makeEd25519Condition(newUser.publicKey), amountToSend) BigchainDB.Transaction
.makeEd25519Condition(newUser.publicKey), amountToSend)
], ],
// Index of the input being spent // Index of the input being spent
0 0
) )
// Sign the transaction with the tokenCreator key // Sign the transaction with the tokenCreator key
const signedTransfer = BigchainDB.Transaction.signTransaction(createTranfer, tokenCreator.privateKey) const signedTransfer = BigchainDB.Transaction
.signTransaction(createTranfer, tokenCreator.privateKey)
return conn.postTransaction(signedTransfer) return conn.postTransaction(signedTransfer)
}) })
.then((signedTransfer) => conn.pollStatusAndFetchTransaction(signedTransfer.id)) .then((signedTransfer) => conn
.pollStatusAndFetchTransaction(signedTransfer.id))
.then(res => { .then(res => {
// Update tokensLeft // Update tokensLeft
tokensLeft -= amountToSend tokensLeft -= amountToSend
document.body.innerHTML += '<h3>Transfer transaction created</h3>'; document.body.innerHTML += '<h3>Transfer transaction created</h3>'
document.body.innerHTML += res.id document.body.innerHTML += res.id
}) })