initial attempt at a raffle contract

.github/workflows/integration-tests.yml

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+name: Integration Tests
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+
+jobs:
+  tests:
+    name: Flow CLI Tests
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        submodules: "true"
+    - name: Set up Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.18
+    - name: Install Flow CLI
+      run: bash -ci "$(curl -fsSL https://raw.githubusercontent.com/onflow/flow-cli/master/install.sh)" -- v1.8.0
+    - name: Run tests
+      run: sh ./run-tests.sh

.gitignore

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+coverage.json
+coverage.lcov
+.idea
+*.pkey
+*.private
+*.pem
+
+node_modules

contracts/Raffles.cdc

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+import "MetadataViews"
+
+pub contract Raffles {
+    pub let ManagerStoragePath: StoragePath
+    pub let ManagerPublicPath: PublicPath
+
+    pub event RaffleCreated(address: Address, raffleID: UInt64, sourceType: Type)
+    pub event RaffleDrawn(address: Address, raffleID: UInt64, sourceType: Type, index: Int, value: String)
+
+    pub struct Details {
+        pub let start: UInt64?
+        pub let end: UInt64?
+        pub let display: MetadataViews.Display
+
+        init(
+            _ start: UInt64?,
+            _ end: UInt64,
+            _ display: MetadataViews.Display
+
+        ) {
+            self.start = start
+            self.end = end
+            self.display = display
+        }
+    }
+
+    pub resource interface RafflePublic {
+        pub fun getEntryAt(index: Int): AnyStruct
+    }
+
+    pub resource Raffle: RafflePublic, MetadataViews.Resolver {
+        pub let source: @{RaffleSource}
+        pub let details: Details
+
+        pub fun draw(): Int {
+            return self.source.draw()
+        }
+
+        pub fun getEntryAt(index: Int): AnyStruct {
+            return self.source.getEntryAt(index: index)
+        }
+
+        pub fun getViews(): [Type] {
+            return [
+                Type<MetadataViews.Display>()
+            ]
+        }
+
+        pub fun resolveView(_ type: Type): AnyStruct? {
+            switch type {
+                case Type<MetadataViews.Display>():
+                    return self.details.display
+            }
+
+            return nil
+        }
+
+        init(
+            source: @{RaffleSource},
+            details: Details
+        ) {
+            self.source <- source
+            self.details = details
+        }
+
+        destroy() {
+            destroy self.source
+        }
+    }
+
+    pub resource interface RaffleSource {
+        pub fun draw(): Int
+        pub fun getEntryAt(index: Int): AnyStruct
+    }
+
+    pub resource AddressRaffleSource: RaffleSource {
+        pub let addresses: [Address]
+
+        pub fun draw(): Int {
+            let r = revertibleRandom()
+            return Int(UInt64(self.addresses.length) % r)
+        }
+
+        pub fun getEntryAt(index: Int): AnyStruct {
+            return self.addresses[index]
+        }
+
+        init() {
+            self.addresses = []
+        }
+    }
+
+    pub resource interface ManagerPublic {
+        pub fun borrowRafflePublic(id: UInt64): &{RafflePublic}?
+    }
+
+    pub resource Manager: ManagerPublic {
+        access(self) let raffles: @{UInt64: Raffle}
+
+        pub fun borrowRafflePublic(id: UInt64): &{RafflePublic}? {
+            if self.raffles[id] == nil {
+                return nil
+            }
+
+            return &self.raffles[id] as &Raffle?
+        }
+
+        init() {
+            self.raffles <- {}
+        }
+
+        destroy () {
+            destroy self.raffles
+        }
+    }
+
+    access(contract) fun emitDrawing(address: Address, raffleID: UInt64, sourceType: Type, index: Int, value: AnyStruct) {
+        var v = "UNKNOWN"
+        switch value.getType() {
+            case Type<Address>():
+                v = (value as! Address).toString()
+                break
+            case Type<UInt64>():
+                v = (value as! UInt64).toString()
+                break
+        }
+
+        emit RaffleDrawn(address: address, raffleID: raffleID, sourceType: sourceType, index: index, value: v)
+    }
+
+    pub fun createManager(): @Manager {
+        return <- create Manager()
+    }
+
+    pub fun createRaffle(source: @{RaffleSource}, details: Details): @Raffle {
+        return <- create Raffle(source: <- source, details: details)        
+    }
+
+    pub fun createRaffleSource(_ type: Type): @{RaffleSource} {
+        switch type {
+            case Type<@AddressRaffleSource>():
+                return <- create AddressRaffleSource()
+        }
+
+        panic("raffle source type ".concat(type.identifier).concat(" is not valid"))
+    }
+
+    init() {
+        let identifier = "Raffle_".concat(self.account.address.toString())
+        self.ManagerStoragePath = StoragePath(identifier: identifier)!
+        self.ManagerPublicPath = PublicPath(identifier: identifier)!
+    }
+}

flow.json

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+{
+  "networks": {
+    "emulator": "127.0.0.1:3569",
+    "mainnet": "access.mainnet.nodes.onflow.org:9000",
+    "testing": "127.0.0.1:3569",
+    "testnet": "access.devnet.nodes.onflow.org:9000"
+  },
+  "accounts": {
+    "emulator-account": {
+      "address": "0xf8d6e0586b0a20c7",
+      "key": "f2e846bd4c1fbf17839ae59e111c6b1c98579eda7a841412f102d6621ec671cb"
+    },
+    "emulator-ft": {
+      "address": "ee82856bf20e2aa6",
+      "key": "f2e846bd4c1fbf17839ae59e111c6b1c98579eda7a841412f102d6621ec671cb"
+    },
+    "emulator-flowtoken": {
+      "address": "0ae53cb6e3f42a79",
+      "key": "f2e846bd4c1fbf17839ae59e111c6b1c98579eda7a841412f102d6621ec671cb"
+    }
+  },
+  "contracts": {
+    "Raffles": {
+      "source": "./contracts/Raffles.cdc",
+      "aliases": {
+        "testing": "0x0000000000000007"
+      }
+    },
+    "FungibleToken": {
+      "source": "./node_modules/@flowtyio/flow-contracts/contracts/FungibleToken.cdc",
+      "aliases": {
+        "emulator": "0xee82856bf20e2aa6",
+        "testnet": "0x9a0766d93b6608b7",
+        "mainnet": "0xf233dcee88fe0abe"
+      }
+    },
+    "MetadataViews": {
+      "source": "./node_modules/@flowtyio/flow-contracts/contracts/MetadataViews.cdc",
+      "aliases": {
+        "emulator": "0xf8d6e0586b0a20c7",
+        "testnet": "0x631e88ae7f1d7c20",
+        "mainnet": "0x1d7e57aa55817448"
+      }
+    },
+    "FungibleTokenMetadataViews": {
+      "source": "./node_modules/@flowtyio/flow-contracts/contracts/FungibleTokenMetadataViews.cdc",
+      "aliases": {
+        "emulator": "0xee82856bf20e2aa6",
+        "testnet": "0x9a0766d93b6608b7",
+        "mainnet": "0xf233dcee88fe0abe"
+      }
+    },
+    "ViewResolver": {
+      "source": "./node_modules/@flowtyio/flow-contracts/contracts/ViewResolver.cdc",
+      "aliases": {
+        "emulator": "0xf8d6e0586b0a20c7",
+        "testnet": "0x631e88ae7f1d7c20",
+        "mainnet": "0x1d7e57aa55817448"
+      }
+    },
+    "NonFungibleToken": {
+      "source": "./node_modules/@flowtyio/flow-contracts/contracts/NonFungibleToken.cdc",
+      "aliases": {
+        "emulator": "0xf8d6e0586b0a20c7",
+        "testnet": "0x631e88ae7f1d7c20",
+        "mainnet": "0x1d7e57aa55817448"
+      }
+    },
+    "FlowToken": {
+      "source": "./node_modules/@flowtyio/flow-contracts/contracts/FlowToken.cdc",
+      "aliases": {
+        "emulator": "0x0ae53cb6e3f42a79",
+        "testnet": "0x7e60df042a9c0868",
+        "mainnet": "0x1654653399040a61"
+      }
+    },
+    "FindViews": {
+      "source": "./node_modules/@flowtyio/flow-contracts/contracts/find/FindViews.cdc",
+      "aliases": {
+        "emulator": "0xf8d6e0586b0a20c7",
+        "mainnet": "0x097bafa4e0b48eef",
+        "testnet": "0x35717efbbce11c74",
+        "testing": "0x0000000000000005"
+      }
+    },
+    "FLOAT": {
+      "source": "./node_modules/@flowtyio/flow-contracts/contracts/emerald-city/FLOAT.cdc",
+      "aliases": {
+        "emulator": "0xf8d6e0586b0a20c7",
+        "mainnet": "0x2d4c3caffbeab845",
+        "testnet": "0x4d47bf3ce5e4393f",
+        "testing": "0x0000000000000005"
+      }
+    }
+  },
+  "deployments": {
+    "emulator": {
+      "emulator-account": [
+        "MetadataViews",
+        "ViewResolver",
+        "NonFungibleToken",
+        "Raffles"
+      ],
+      "emulator-ft": [
+        "FungibleToken",
+        "FungibleTokenMetadataViews"
+      ],
+      "emulator-flowtoken": [
+        "FlowToken"
+      ]
+    }
+  }
+}

package.json

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+{
+  "dependencies": {
+    "@flowtyio/flow-contracts": "^0.0.18"
+  }
+}

run-tests.sh

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+#!/bin/bash
+
+set -e
+
+flow test --cover --covercode="contracts" --coverprofile="coverage.lcov" test/*_tests.cdc

scripts/borrow_manager.cdc

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+import "Raffles"
+
+pub fun main(addr: Address) {
+    getAccount(addr).getCapability<&Raffles.Manager{Raffles.ManagerPublic}>(Raffles.ManagerPublicPath).borrow()
+        ?? panic("unable to borrow manager")
+}

test/Raffles_tests.cdc

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+import Test
+import "test_helpers.cdc"
+
+import "Raffles"
+
+
+pub fun setup() {
+    let err = Test.deployContract(name: "Raffles", path: "../contracts/Raffles.cdc", arguments: [])
+    Test.expect(err, Test.beNil())
+}
+
+pub fun setupManager() {
+    let acct = Test.createAccount()
+    txExecutor("setup_manager", [acct], [], nil)
+    scriptExecutor("borrow_manager.cdc", [acct.address])
+}