mirror of
https://github.com/nspcc-dev/neo-go.git
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141 lines
2.6 KiB
Markdown
141 lines
2.6 KiB
Markdown
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# NEO-GO-VM
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A cross platform virtual machine implementation for `avm` compatible programs.
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# Installation
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## With neo-go
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Install dependencies.
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`neo-go` uses [dep](https://github.com/golang/dep) as its dependency manager. After installing `deps` you can run:
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```
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make deps
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```
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Build the `neo-go` cli:
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```
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make build
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```
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Start the virtual machine:
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```
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./bin/neo-go vm
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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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/_/ |_/_____/\____/ \____/\____/ |___/_/ /_/
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NEO-GO-VM >
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```
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## Standalone
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More information about standalone installation coming soon.
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# Usage
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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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NEO-GO-VM > help
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COMMAND USAGE
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run execute the current loaded script
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exit exit the VM prompt
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estack shows evaluation stack details
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break place a breakpoint (> break 1)
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astack shows alt stack details
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istack show invocation stack details
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load load a script into the VM (> load /path/to/script.avm)
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resume resume the current loaded script
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step step (n) instruction in the program (> step 10)
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help show available commands
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ip show the current instruction
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opcode print the opcodes of the current loaded program
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```
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### Loading in your script
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To load a script into the VM:
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```
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NEO-GO-VM > load ../contract.avm
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READY
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```
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Run the script:
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```
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NEO-GO-VM > run
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[
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{
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"value": 1,
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"type": "BigInteger"
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}
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]
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```
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### Debugging
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The `neo-go-vm` provides a debugger to inspect your program in-depth.
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Step 4 instructions.
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```
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NEO-GO-VM > step 4
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at breakpoint 4 (Opush4)
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```
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Using just `step` will execute 1 instruction at a time.
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```
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NEO-GO-VM > step
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instruction pointer at 5 (Odup)
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```
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To place breakpoints:
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```
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NEO-GO-VM > break 10
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breakpoint added at instruction 10
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NEO-GO-VM > resume
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at breakpoint 10 (Osetitem)
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```
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Inspecting the stack:
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```
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NEO-GO-VM > stack
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[
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{
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"value": [
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null,
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null,
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null,
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null,
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null,
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null,
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null
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],
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"type": "Array"
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},
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{
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"value": 4,
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"type": "BigInteger"
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}
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]
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```
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And a lot more features coming next weeks..
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