lotus/chain/types/message.go

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package types
import (
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"bytes"
"fmt"
block "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
"github.com/multiformats/go-multihash"
"github.com/filecoin-project/lotus/chain/address"
)
type Message struct {
To address.Address
From address.Address
Nonce uint64
Value BigInt
GasPrice BigInt
GasLimit BigInt
Method uint64
Params []byte
}
func DecodeMessage(b []byte) (*Message, error) {
var msg Message
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if err := msg.UnmarshalCBOR(bytes.NewReader(b)); err != nil {
return nil, err
}
return &msg, nil
}
func (m *Message) Serialize() ([]byte, error) {
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buf := new(bytes.Buffer)
if err := m.MarshalCBOR(buf); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
func (m *Message) ToStorageBlock() (block.Block, error) {
data, err := m.Serialize()
if err != nil {
return nil, err
}
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pref := cid.NewPrefixV1(cid.DagCBOR, multihash.BLAKE2B_MIN+31)
c, err := pref.Sum(data)
if err != nil {
return nil, err
}
return block.NewBlockWithCid(data, c)
}
func (m *Message) Cid() cid.Cid {
b, err := m.ToStorageBlock()
if err != nil {
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panic(fmt.Sprintf("failed to marshal message: %s", err)) // I think this is maybe sketchy, what happens if we try to serialize a message with an undefined address in it?
}
return b.Cid()
}
func (m *Message) RequiredFunds() BigInt {
return BigAdd(
m.Value,
BigMul(m.GasPrice, m.GasLimit),
)
}
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func (m *Message) VMMessage() *Message {
return m
}