SNAPALGO

ALGORAND on MetaMask

SnapAlgo is an Algorand wallet built on metamask developmental snaps feature which allows code to be run in a secure execution enviroment inside the metamask extension itself. Because the feature is so new it is currently only available on Metamask Flask which can be found here
https://metamask.io/flask/

Demo

snapalgo.io

example apps

#### simple wallet
https://snapalgowallet.netlify.app/
#### Simple Swap app
https://algoswap.netlify.app/

Useage

$3

> npx mm-snap build

compiles the src folder into a functional version of the snap

$3

> npx mm-snap serve

Serves index.html on port 3000

$3

It is possible to use an sdk to simplify using snapalgo.
repository
This creates a floating wallet on the dapp for better user experence.
As well as creating an easier developer experence by not requiring the
developer to call raw rpc functions.

$3

Add and Call the below function to connect to the wallet.
If the user does not have the snap installed, but has metamask flask installed this code will automaticly install it for them. This code snippet can be added to any website with 0 depenancies otheer than metamask flask

``javascript
async function connect () {
await window.ethereum.request({
method: 'wallet_enable',
params: [{
wallet_snap: { 'npm:algorand': {} },
}]
})
}
`

$3

Below is an example call to the snap that transacts 1000 microalgos to an entered public address. Again this can be run with 0 dependency other than metamask flask
---
All methods can be called with the param:
testnet: (bool)
if the method does not depend on the testnet it is ignored
if the method can be used with testnet, testnet is then used instead
---
`javascript
const address = prompt("Please enter your recipient Address");
const response = await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'transfer',
params:{
testnet: false,
to: address,
amount: 1000
}
}]
})
`

$3

---

Account functions

These functions handle getting infomation about a users account, assets, balance, and history
---

#### displayBalance
Displays the users current balance in a metamask flask popup

`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params:['npm:algorand',{
method: 'displayBalance',
params:{
testnet: false
}
}]
})
`
#### getBalance
returns the users current balance
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'getBalance',
parms:{
testnet: false
}
}]
})
`
#### getAddress
returns the public address of the wallet
`javascript
let address = await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'getAddress',
}]
})
`

#### transfer
transfers a number of algos to a specified address
`javascript
const address = prompt("Please enter your name");
const response = await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'transfer',
params:{
testnet: false,
to: address,
amount: 1000
?note: "string"
}
}]
})
`
#### displayMnemonic
displays the wallets algorand mnemonic in a secure metamask window
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'displayMnemonic'
}]
})
`
#### getTransactions
returns a list of javascript objects containing transaction data
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'getTransactions',
params:{
testnet: false
}
}]
})
`

$3

returns a list of the current accounts assets
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'getAssets',
params:{
testnet: false
}
}]
})
`

$3

returns an object containing all of the algorand accounts on a users metamask
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'getAccounts',
}]
})
`

$3

returns the users current Account
`javascript
returns the users current Account
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'getCurrentAccount',
}]
})
`

$3

sets the Users Current Account
takes an algorand address as a parameter and throws an error if the address is not contained in the users wallet
returns the users current Account
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'setCurrentAccount',
}]
})
`
*

Arc Complience Functions

these functions are used ARC complient ways to sign arbitray transactions
*

$3

sign an array of WalletTransaction objects
returns an array of signed b64 algorand transactions
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'signTxns'
params:{
txns:[WalletTransaction]
}
}]
})
`

$3

takes an array of b64 signed algorand transactions. Like the output of signTxns and sends them to the algorand blockchain.
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'postTxns'
params:{
stxns: ["b64SignedTxn"]
}
}]
})
`

$3

takes an array of WalletTransaction objects and signs then posts them to the algorand blockchain
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'signAndPostTxns'
params:{
txns: [WalletTransaction]
}
}]
})
`


*

Asset Functions

the functions are used to interact with algorand assets
*

$3

opts into an algorand asset
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'assetOptIn'
params:{
assetIndex: int
}
}]
})
`

$3

opts out of an algorand asset
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'assetOptOut'
params:{
assetIndex: int
}
}]
})
`

$3

sends an algorand asset to another wallet that is opted into the given asset
`javascript
await window.ethereum.request({
method: 'wallet_invokeSnap',
params: ['npm:algorand', {
method: 'assetOptOut'
params:{
assetIndex: int
to: "algorandAddress"
amount: string
}
}]
})
`


*

swapping functions

These functions are used to swap crypto between
Algorand, Etherum, and Binance Smart Chain
The ticker values are
algo | eth | bsc

*

$3

get minimum input amount for a specific swap
`javascript
async function getMin(){
const result = await ethereum.request({
method: 'wallet_invokeSnap',
params: [
'npm:algorand', {
method: 'getMin',
params:{
from: 'eth' | 'bsc' | 'algo',
to: 'eth' | 'bsc' | 'algo',
}
}
]
})
return result;
}
`

$3

Get infomation about a swap without actually swapping
`javascript
async function preSwap(){
const result = await ethereum.request({
method: 'wallet_invokeSnap',
params: [
'npm:algorand', {
method: 'preSwap',
params:{
from: 'eth' | 'bsc' | 'algo',
to: 'eth' | 'bsc' | 'algo',
amount: Number(amount) //done in base units i.e. eth not wei
}
}
]
})
return result
}
`

$3

swap currencies
this will automatically send send the required currency to the exchange and use the selected address to receive the cash
uses changenow
`javascript
async function swap(){
const result = await ethereum.request({
method: 'wallet_invokeSnap',
params: [
'npm:algorand', {
method: 'swap',
params:{
from: 'eth' | 'bsc' | 'algo',
to: 'eth' | 'bsc' | 'algo',
amount: Number(amount) //done in base units i.e. eth not wei
email: String("emailAddress@example.com") //completely optional
}
}
]
})
return result
}

`

$3

the method returns an array of swap objects that give info about a swap performed by a given wallet.
`javascript
async function swapHistory(){
const result = await ethereum.request({
method: 'wallet_invokeSnap',
params: [
'npm:algorand', {
method: 'swapHistory',
}
]
})
return result
}

`

$3

this method returns a status object of swap given the swaps id that can be obtained from swap history
`javascript
async function swapHistory(){
const result = await ethereum.request({
method: 'wallet_invokeSnap',
params: [
'npm:algorand', {
method: 'getSwapStatus',
params:{
id: 'changenowSwapID'
}
}
]
})
return result
}
``

More RPC methods to come