90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
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package builders
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import (
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"bytes"
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"encoding/binary"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/lotus/chain/actors/aerrors"
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"github.com/multiformats/go-varint"
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)
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// AddressHandle encapsulates both the ID and Robust addresses of an actor.
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type AddressHandle struct {
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ID, Robust address.Address
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}
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// NextActorAddress predicts the address of the next actor created by this address.
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//
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// Code is adapted from vm.Runtime#NewActorAddress()
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func (ah *AddressHandle) NextActorAddress(nonce, numActorsCreated uint64) address.Address {
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var b bytes.Buffer
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if err := ah.Robust.MarshalCBOR(&b); err != nil {
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panic(aerrors.Fatalf("writing caller address into assert buffer: %v", err))
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}
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if err := binary.Write(&b, binary.BigEndian, nonce); err != nil {
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panic(aerrors.Fatalf("writing nonce address into assert buffer: %v", err))
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}
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if err := binary.Write(&b, binary.BigEndian, numActorsCreated); err != nil {
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panic(aerrors.Fatalf("writing callSeqNum address into assert buffer: %v", err))
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}
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addr, err := address.NewActorAddress(b.Bytes())
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if err != nil {
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panic(aerrors.Fatalf("create actor address: %v", err))
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}
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return addr
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}
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// MustNewIDAddr returns an address.Address of kind ID.
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func MustNewIDAddr(id uint64) address.Address {
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addr, err := address.NewIDAddress(id)
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if err != nil {
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panic(err)
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}
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return addr
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}
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// MustNewSECP256K1Addr returns an address.Address of kind secp256k1.
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func MustNewSECP256K1Addr(pubkey string) address.Address {
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// the pubkey of assert secp256k1 address is hashed for consistent length.
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addr, err := address.NewSecp256k1Address([]byte(pubkey))
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if err != nil {
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panic(err)
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}
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return addr
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}
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// MustNewBLSAddr returns an address.Address of kind bls.
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func MustNewBLSAddr(seed int64) address.Address {
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buf := make([]byte, address.BlsPublicKeyBytes)
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binary.PutVarint(buf, seed)
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addr, err := address.NewBLSAddress(buf)
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if err != nil {
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panic(err)
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}
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return addr
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}
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// MustNewActorAddr returns an address.Address of kind actor.
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func MustNewActorAddr(data string) address.Address {
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addr, err := address.NewActorAddress([]byte(data))
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if err != nil {
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panic(err)
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}
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return addr
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}
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// MustIDFromAddress returns the integer ID from an ID address.
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func MustIDFromAddress(a address.Address) uint64 {
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if a.Protocol() != address.ID {
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panic("must be ID protocol address")
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}
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id, _, err := varint.FromUvarint(a.Payload())
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if err != nil {
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panic(err)
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}
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return id
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}
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