forked from TrueCloudLab/neoneo-go
510 lines
15 KiB
Go
510 lines
15 KiB
Go
package smartcontract
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import (
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"bufio"
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"bytes"
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"context"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/CityOfZion/neo-go/pkg/crypto/hash"
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"github.com/CityOfZion/neo-go/pkg/crypto/keys"
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"github.com/CityOfZion/neo-go/pkg/rpc"
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"github.com/CityOfZion/neo-go/pkg/smartcontract"
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"github.com/CityOfZion/neo-go/pkg/util"
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"github.com/CityOfZion/neo-go/pkg/vm"
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"github.com/CityOfZion/neo-go/pkg/vm/compiler"
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"github.com/go-yaml/yaml"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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)
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var (
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errNoEndpoint = errors.New("no RPC endpoint specified, use option '--endpoint' or '-e'")
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errNoInput = errors.New("no input file was found, specify an input file with the '--in or -i' flag")
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errNoConfFile = errors.New("no config file was found, specify a config file with the '--config' or '-c' flag")
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errNoWIF = errors.New("no WIF parameter found, specify it with the '--wif or -w' flag")
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errNoScriptHash = errors.New("no smart contract hash was provided, specify one as the first argument")
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errNoSmartContractName = errors.New("no name was provided, specify the '--name or -n' flag")
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errFileExist = errors.New("A file with given smart-contract name already exists")
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endpointFlag = cli.StringFlag{
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Name: "endpoint, e",
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Usage: "trusted RPC endpoint address (like 'http://localhost:20331')",
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}
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)
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const (
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// smartContractTmpl is written to a file when used with `init` command.
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// %s is parsed to be the smartContractName
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smartContractTmpl = `package %s
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import "github.com/CityOfZion/neo-go/pkg/interop/runtime"
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func Main(op string, args []interface{}) {
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runtime.Notify("Hello world!")
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}`
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)
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// NewCommands returns 'contract' command.
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func NewCommands() []cli.Command {
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return []cli.Command{{
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Name: "contract",
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Usage: "compile - debug - deploy smart contracts",
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Subcommands: []cli.Command{
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{
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Name: "compile",
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Usage: "compile a smart contract to a .avm file",
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Action: contractCompile,
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "in, i",
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Usage: "Input file for the smart contract to be compiled",
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},
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cli.StringFlag{
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Name: "out, o",
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Usage: "Output of the compiled contract",
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},
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cli.BoolFlag{
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Name: "debug, d",
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Usage: "Debug mode will print out additional information after a compiling",
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},
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},
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},
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{
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Name: "deploy",
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Usage: "deploy a smart contract (.avm with description)",
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Action: contractDeploy,
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "in, i",
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Usage: "Input file for the smart contract (*.avm)",
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},
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cli.StringFlag{
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Name: "config, c",
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Usage: "configuration input file (*.yml)",
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},
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endpointFlag,
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cli.StringFlag{
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Name: "wif, w",
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Usage: "key to sign deployed transaction (in wif format)",
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},
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cli.Float64Flag{
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Name: "gas, g",
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Usage: "gas to pay for contract deployment",
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},
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},
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},
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{
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Name: "testinvoke",
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Usage: "invoke deployed contract on the blockchain (test mode)",
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UsageText: "neo-go contract testinvoke -e endpoint scripthash [arguments...]",
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Description: `Executes given (as a script hash) deployed script with the given arguments.
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It's very similar to the tesinvokefunction command, but differs in the way
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arguments are being passed. This invoker does not accept method parameter
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and it passes all given parameters as plain values to the contract, not
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wrapping them them into array like testinvokefunction does. For arguments
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syntax please refer to the testinvokefunction command help.
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Most of the time (if your contract follows the standard convention of
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method with array of values parameters) you want to use testinvokefunction
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command instead of testinvoke.
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`,
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Action: testInvoke,
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Flags: []cli.Flag{
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endpointFlag,
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},
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},
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{
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Name: "testinvokefunction",
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Usage: "invoke deployed contract on the blockchain (test mode)",
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UsageText: "neo-go contract testinvokefunction -e endpoint scripthash [method] [arguments...]",
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Description: `Executes given (as a script hash) deployed script with the given method and
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arguments. If no method is given "" is passed to the script, if no arguments
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are given, an empty array is passed. All of the given arguments are
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encapsulated into array before invoking the script. The script thus should
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follow the regular convention of smart contract arguments (method string and
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an array of other arguments).
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Arguments always do have regular Neo smart contract parameter types, either
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specified explicitly or being inferred from the value. To specify the type
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manually use "type:value" syntax where the type is one of the following:
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'signature', 'bool', 'int', 'hash160', 'hash256', 'bytes', 'key' or 'string'.
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Array types are not currently supported.
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Given values are type-checked against given types with the following
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restrictions applied:
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* 'signature' type values should be hex-encoded and have a (decoded)
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length of 64 bytes.
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* 'bool' type values are 'true' and 'false'.
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* 'int' values are decimal integers that can be successfully converted
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from the string.
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* 'hash160' values are Neo addresses and hex-encoded 20-bytes long (after
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decoding) strings.
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* 'hash256' type values should be hex-encoded and have a (decoded)
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length of 32 bytes.
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* 'bytes' type values are any hex-encoded things.
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* 'key' type values are hex-encoded marshalled public keys.
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* 'string' type values are any valid UTF-8 strings. In the value's part of
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the string the colon looses it's special meaning as a separator between
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type and value and is taken literally.
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If no type is explicitly specified, it is inferred from the value using the
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following logic:
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- anything that can be interpreted as a decimal integer gets
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an 'int' type
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- 'true' and 'false' strings get 'bool' type
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- valid Neo addresses and 20 bytes long hex-encoded strings get 'hash160'
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type
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- valid hex-encoded public keys get 'key' type
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- 32 bytes long hex-encoded values get 'hash256' type
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- 64 bytes long hex-encoded values get 'signature' type
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- any other valid hex-encoded values get 'bytes' type
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- anything else is a 'string'
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Backslash character is used as an escape character and allows to use colon in
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an implicitly typed string. For any other characters it has no special
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meaning, to get a literal backslash in the string use the '\\' sequence.
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Examples:
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* 'int:42' is an integer with a value of 42
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* '42' is an integer with a value of 42
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* 'bad' is a string with a value of 'bad'
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* 'dead' is a byte array with a value of 'dead'
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* 'string:dead' is a string with a value of 'dead'
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* 'AK2nJJpJr6o664CWJKi1QRXjqeic2zRp8y' is a hash160 with a value
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of '23ba2703c53263e8d6e522dc32203339dcd8eee9'
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* '\4\2' is an integer with a value of 42
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* '\\4\2' is a string with a value of '\42'
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* 'string:string' is a string with a value of 'string'
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* 'string\:string' is a string with a value of 'string:string'
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* '03b209fd4f53a7170ea4444e0cb0a6bb6a53c2bd016926989cf85f9b0fba17a70c' is a
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key with a value of '03b209fd4f53a7170ea4444e0cb0a6bb6a53c2bd016926989cf85f9b0fba17a70c'
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`,
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Action: testInvokeFunction,
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Flags: []cli.Flag{
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endpointFlag,
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},
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},
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{
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Name: "testinvokescript",
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Usage: "Invoke compiled AVM code on the blockchain (test mode, not creating a transaction for it)",
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Action: testInvokeScript,
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Flags: []cli.Flag{
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endpointFlag,
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cli.StringFlag{
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Name: "in, i",
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Usage: "Input location of the avm file that needs to be invoked",
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},
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},
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},
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{
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Name: "init",
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Usage: "initialize a new smart-contract in a directory with boiler plate code",
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Action: initSmartContract,
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "name, n",
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Usage: "name of the smart-contract to be initialized",
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},
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cli.BoolFlag{
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Name: "skip-details, skip",
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Usage: "skip filling in the projects and contract details",
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},
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},
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},
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{
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Name: "inspect",
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Usage: "creates a user readable dump of the program instructions",
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Action: inspect,
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Flags: []cli.Flag{
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cli.BoolFlag{
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Name: "compile, c",
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Usage: "compile input file (it should be go code then)",
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},
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cli.StringFlag{
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Name: "in, i",
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Usage: "input file of the program",
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},
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},
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},
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},
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}}
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}
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// initSmartContract initializes a given directory with some boiler plate code.
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func initSmartContract(ctx *cli.Context) error {
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contractName := ctx.String("name")
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if contractName == "" {
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return cli.NewExitError(errNoSmartContractName, 1)
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}
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// Check if the file already exists, if yes, exit
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if _, err := os.Stat(contractName); err == nil {
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return cli.NewExitError(errFileExist, 1)
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}
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basePath := contractName
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fileName := "main.go"
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// create base directory
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if err := os.Mkdir(basePath, os.ModePerm); err != nil {
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return cli.NewExitError(err, 1)
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}
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// Ask contract information and write a neo-go.yml file unless the -skip-details flag is set.
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// TODO: Fix the missing neo-go.yml file with the `init` command when the package manager is in place.
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if !ctx.Bool("skip-details") {
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details := parseContractDetails()
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details.ReturnType = rpc.ByteArray
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details.Parameters = make([]rpc.StackParamType, 2)
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details.Parameters[0] = rpc.String
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details.Parameters[1] = rpc.Array
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project := &ProjectConfig{Contract: details}
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b, err := yaml.Marshal(project)
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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if err := ioutil.WriteFile(filepath.Join(basePath, "neo-go.yml"), b, 0644); err != nil {
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return cli.NewExitError(err, 1)
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}
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}
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data := []byte(fmt.Sprintf(smartContractTmpl, contractName))
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if err := ioutil.WriteFile(filepath.Join(basePath, fileName), data, 0644); err != nil {
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return cli.NewExitError(err, 1)
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}
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fmt.Printf("Successfully initialized smart contract [%s]\n", contractName)
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return nil
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}
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func contractCompile(ctx *cli.Context) error {
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src := ctx.String("in")
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if len(src) == 0 {
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return cli.NewExitError(errNoInput, 1)
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}
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o := &compiler.Options{
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Outfile: ctx.String("out"),
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Debug: ctx.Bool("debug"),
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}
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if err := compiler.CompileAndSave(src, o); err != nil {
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return cli.NewExitError(err, 1)
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}
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return nil
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}
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func testInvoke(ctx *cli.Context) error {
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return testInvokeInternal(ctx, false)
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}
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func testInvokeFunction(ctx *cli.Context) error {
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return testInvokeInternal(ctx, true)
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}
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func testInvokeInternal(ctx *cli.Context, withMethod bool) error {
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var resp *rpc.InvokeScriptResponse
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var operation string
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var paramsStart = 1
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var params = make([]smartcontract.Parameter, 0)
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endpoint := ctx.String("endpoint")
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if len(endpoint) == 0 {
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return cli.NewExitError(errNoEndpoint, 1)
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}
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args := ctx.Args()
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if !args.Present() {
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return cli.NewExitError(errNoScriptHash, 1)
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}
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script := args[0]
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if withMethod && len(args) > 1 {
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operation = args[1]
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paramsStart++
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}
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if len(args) > paramsStart {
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for k, s := range args[paramsStart:] {
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param, err := smartcontract.NewParameterFromString(s)
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if err != nil {
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return cli.NewExitError(fmt.Errorf("failed to parse argument #%d: %v", k+paramsStart+1, err), 1)
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}
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params = append(params, *param)
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}
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}
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client, err := rpc.NewClient(context.TODO(), endpoint, rpc.ClientOptions{})
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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if withMethod {
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resp, err = client.InvokeFunction(script, operation, params)
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} else {
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resp, err = client.Invoke(script, params)
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}
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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b, err := json.MarshalIndent(resp.Result, "", " ")
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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fmt.Println(string(b))
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return nil
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}
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func testInvokeScript(ctx *cli.Context) error {
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src := ctx.String("in")
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if len(src) == 0 {
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return cli.NewExitError(errNoInput, 1)
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}
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endpoint := ctx.String("endpoint")
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if len(endpoint) == 0 {
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return cli.NewExitError(errNoEndpoint, 1)
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}
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b, err := ioutil.ReadFile(src)
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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client, err := rpc.NewClient(context.TODO(), endpoint, rpc.ClientOptions{})
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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scriptHex := hex.EncodeToString(b)
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resp, err := client.InvokeScript(scriptHex)
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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b, err = json.MarshalIndent(resp.Result, "", " ")
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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fmt.Println(string(b))
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return nil
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}
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// ProjectConfig contains project metadata.
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type ProjectConfig struct {
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Version uint
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Contract rpc.ContractDetails `yaml:"project"`
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}
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func parseContractDetails() rpc.ContractDetails {
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details := rpc.ContractDetails{}
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reader := bufio.NewReader(os.Stdin)
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fmt.Print("Author: ")
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details.Author, _ = reader.ReadString('\n')
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fmt.Print("Email: ")
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details.Email, _ = reader.ReadString('\n')
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fmt.Print("Version: ")
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details.Version, _ = reader.ReadString('\n')
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fmt.Print("Project name: ")
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details.ProjectName, _ = reader.ReadString('\n')
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fmt.Print("Description: ")
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details.Description, _ = reader.ReadString('\n')
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return details
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}
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func inspect(ctx *cli.Context) error {
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in := ctx.String("in")
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compile := ctx.Bool("compile")
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if len(in) == 0 {
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return cli.NewExitError(errNoInput, 1)
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}
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b, err := ioutil.ReadFile(in)
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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if compile {
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b, err = compiler.Compile(bytes.NewReader(b))
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if err != nil {
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return cli.NewExitError(errors.Wrap(err, "failed to compile"), 1)
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}
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}
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v := vm.New()
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v.LoadScript(b)
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v.PrintOps()
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return nil
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}
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// contractDeploy deploys contract.
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func contractDeploy(ctx *cli.Context) error {
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in := ctx.String("in")
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if len(in) == 0 {
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return cli.NewExitError(errNoInput, 1)
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}
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confFile := ctx.String("config")
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if len(confFile) == 0 {
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return cli.NewExitError(errNoConfFile, 1)
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}
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endpoint := ctx.String("endpoint")
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if len(endpoint) == 0 {
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return cli.NewExitError(errNoEndpoint, 1)
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}
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wifStr := ctx.String("wif")
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if len(wifStr) == 0 {
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return cli.NewExitError(errNoWIF, 1)
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}
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gas := util.Fixed8FromFloat(ctx.Float64("gas"))
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wif, err := keys.WIFDecode(wifStr, 0)
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if err != nil {
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return cli.NewExitError(fmt.Errorf("bad wif: %v", err), 1)
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}
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avm, err := ioutil.ReadFile(in)
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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confBytes, err := ioutil.ReadFile(confFile)
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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conf := ProjectConfig{}
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err = yaml.Unmarshal(confBytes, &conf)
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if err != nil {
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return cli.NewExitError(fmt.Errorf("bad config: %v", err), 1)
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}
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client, err := rpc.NewClient(context.TODO(), endpoint, rpc.ClientOptions{})
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if err != nil {
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return cli.NewExitError(err, 1)
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}
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txScript, err := rpc.CreateDeploymentScript(avm, &conf.Contract)
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if err != nil {
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return cli.NewExitError(fmt.Errorf("failed to create deployment script: %v", err), 1)
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}
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txHash, err := client.SignAndPushInvocationTx(txScript, wif, gas)
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if err != nil {
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return cli.NewExitError(fmt.Errorf("failed to push invocation tx: %v", err), 1)
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}
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fmt.Printf("Sent deployment transaction %s for contract %s\n", txHash.ReverseString(), hash.Hash160(avm).ReverseString())
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return nil
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}
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