fix: vm.WithUNSAFECallerAddressProxying under DELEGATECALL
#50
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Why this should be merged
Correct backwards compatibility for
ava-labs/corethNativeAssetCall(NAC).How this works
NACalways acted as if it were its actual caller, not its effective caller under EVM rules. AsDelegateCallmodifies both the effective self and caller addresses, theWithUNSAFECallerAddressProxying()option now properly selects the actual caller to use when making outgoing calls.In addition to proxying its actual-caller address on outbound calls,
NACcharged the actual caller of the precompile. To discern this, theCallTypeis made available viaPrecompileEnvironment. See the example code for how to determine the actual caller.How this was tested
Additional test cases for
TestPrecompileMakeCallas this asserts the addresses as seen by the contract called by the precompile.