Function Snapshot

protocol/txbuilder/standard/input.go:56–87

Snapshot adds to b the snapshot of a pay-to-multisig-program contract as it appears in the UTXO set.

(b *txvmutil.Builder,
	quorum int,
	pubkeys []ed25519.PublicKey,
	amount int64,
	assetID bc.Hash,
	anchor []byte,
	seed []byte, // PayToMultisigSeed1[:] or PayToMultisigSeed2[:]
)

// Snapshot adds to b the snapshot of a pay-to-multisig-program contract as it appears in the UTXO set.
func Snapshot(b *txvmutil.Builder,
	quorum int,
	pubkeys []ed25519.PublicKey,
	amount int64,
	assetID bc.Hash,
	anchor []byte,
	seed []byte, // PayToMultisigSeed1[:] or PayToMultisigSeed2[:]
) {
	b.Tuple(func(contract *txvmutil.TupleBuilder) {
		contract.PushdataByte(txvm.ContractCode)          // 'C'
		contract.PushdataBytes(seed)                      // <seed>
		contract.PushdataBytes(payToMultisigProgUnlock)   // [<multisig unlock prog>]
		contract.Tuple(func(tup *txvmutil.TupleBuilder) { // {'Z', quorum}
			tup.PushdataByte(txvm.IntCode)
			tup.PushdataInt64(int64(quorum))
		})
		contract.Tuple(func(tup *txvmutil.TupleBuilder) { // {'T', {p1,...,p_n}}
			tup.PushdataByte(txvm.TupleCode)
			tup.Tuple(func(pktup *txvmutil.TupleBuilder) {
				for _, pubkey := range pubkeys {
					pktup.PushdataBytes(pubkey)
				}
			})
		})
		contract.Tuple(func(tup *txvmutil.TupleBuilder) { // {'V', amount, assetID, anchor}
			tup.PushdataByte(txvm.ValueCode)
			tup.PushdataInt64(amount)
			tup.PushdataBytes(assetID.Bytes())
			tup.PushdataBytes(anchor)
		})
	})
}