examples/intro/4-ipfs-code-execution/aqua/src/process.aqua

import "@fluencelabs/aqua-lib/builtin.aqua"
import "@fluencelabs/aqua-ipfs/ipfs.aqua"
import "process_files.aqua"

alias PeerId : string
alias CID : string
alias Multiaddr : string
alias Hash : string
alias ServiceID : string

service NewDist("dist"):
    default_module_config(name: string) -> ModuleConfig
    add_module_from_vault(path: string, config: ModuleConfig) -> Hash

service NewOp("op"):
    concat_strings(a: string, b: string) -> string
    array(s: string) -> []string

-- Add module to node
func add_module(name: string, path: string) -> Hash:
    config <- NewDist.default_module_config(name)
    module_hash <- NewDist.add_module_from_vault(path, config)
    <- module_hash

-- Add service blueprint to node
func add_blueprint(module_hash: Hash) -> string:
    prefixed_hash <- NewOp.concat_strings("hash:", module_hash)
    dependencies <- NewOp.array(prefixed_hash)
    blueprint <- Dist.make_blueprint("process_files", dependencies)
    blueprint_id <- Dist.add_blueprint(blueprint)
    <- blueprint_id

-- Download single .wasm module from IPFS and create a service from it
func deploy_service(relay: PeerId, cid: CID, ipfs: Multiaddr, error: string, string -> ()) -> ?ServiceID:
    service_id: *ServiceID
    on relay:
        -- Download .wasm from IPFS to node
        get_result <- Ipfs.get_from(cid, ipfs)        
        if get_result.success:
            module_hash <- add_module("process_files", get_result.path)
            blueprint_id <- add_blueprint(module_hash)
            service_id <- Srv.create(blueprint_id)
        else:
            co error("Ipfs.get_from failed", get_result.error)
    
    <- service_id

-- Download file from IPFS, and write it's size to file in IPFS
func put_file_size(
    relay: PeerId, 
    cid: CID, 
    ipfs: Multiaddr, 
    service_id: ServiceID, 
    logSize: u32 -> (),
    error: string, string -> ()
) -> ?IpfsPutResult:
    result: *IpfsPutResult
    ProcessFiles service_id
    on relay:
        get <- Ipfs.get_from(cid, ipfs)
        if get.success:
            size <- ProcessFiles.file_size(get.path)
            if size.success:
                -- report file size in background
                co logSize(size.size)
                -- write file size to disk
                write <- ProcessFiles.write_file_size(size.size)
                if write.success:
                    -- upload file to ipfs
                    result <- Ipfs.put(write.path)
                else:
                    co error("ProcessFiles.write_file_size failed", write.error)
            else:
                co error("ProcessFiles.file_size failed", size.error)
        else:
            co error("Ipfs.get_from failed", get.error)
    <- result

func remove_service(relay: PeerId, service_id: ServiceID) -> bool:
    on relay:
        Srv.remove(service_id)
    <- true