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PinnieToken - Full Contract
pub contract PinnieToken {
pub var totalSupply: UFix64
pub var tokenName: String
pub resource interface Provider {
pub fun withdraw(amount: UFix64): @Vault {
post {
result.balance == UFix64(amount):
"Withdrawal amount must be the same as the balance of the withdrawn Vault"
}
}
}
pub resource interface Receiver {
pub fun deposit(from: @Vault)
}
pub resource interface Balance {
pub var balance: UFix64
}
pub resource Vault: Provider, Receiver, Balance {
pub var balance: UFix64
init(balance: UFix64) {
self.balance = balance
}
pub fun withdraw(amount: UFix64): @Vault {
self.balance = self.balance - amount
return <-create Vault(balance: amount)
}
pub fun deposit(from: @Vault) {
self.balance = self.balance + from.balance
destroy from
}
}
pub fun createEmptyVault(): @Vault {
return <-create Vault(balance: 0.0)
}
pub resource VaultMinter {
pub fun mintTokens(amount: UFix64, recipient: Capability<&AnyResource{Receiver}>) {
let recipientRef = recipient.borrow()
?? panic("Could not borrow a receiver reference to the vault")
PinnieToken.totalSupply = PinnieToken.totalSupply + UFix64(amount)
recipientRef.deposit(from: <-create Vault(balance: amount))
}
}
init() {
self.totalSupply = 30.0
self.tokenName = "Pinnie"
let vault <- create Vault(balance: self.totalSupply)
self.account.save(<-vault, to: /storage/MainVault)
self.account.save(<-create VaultMinter(), to: /storage/MainMinter)
self.account.link<&VaultMinter>(/private/Minter, target: /storage/MainMinter)
}
}
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